{"id":419,"date":"2026-04-22T05:19:44","date_gmt":"2026-04-22T05:19:44","guid":{"rendered":"https:\/\/blog.proactivepcb.com\/uncategorized\/ul-rating-requirements-pcb-assemblies\/"},"modified":"2026-07-27T05:22:59","modified_gmt":"2026-07-27T05:22:59","slug":"ul-rating-requirements-pcb-assemblies","status":"publish","type":"post","link":"https:\/\/proactivepcb.com\/articles\/pcb-compliance-certification\/ul-rating-requirements-pcb-assemblies\/","title":{"rendered":"UL Rating Requirements for PCB Assemblies"},"content":{"rendered":"<p><em>Last updated: July 24, 2026<\/em><\/p>\n<h2>Key takeaways for UL-compliant PCB assemblies<\/h2>\n<ul>\n<li>\n<p>UL 796 provides component-level recognition for bare PCBs. Assembled products require separate evaluation under end-product standards such as UL 62368-1, UL 508A or UL 60601-1.<\/p>\n<\/li>\n<li>\n<p>UL 94 V-0 flammability rating is the standard expectation for FR-4 materials in regulated applications. The rating appears on board markings alongside the UL file number.<\/p>\n<\/li>\n<li>\n<p>Creepage, clearance, MOT, RTI and CTI requirements come from the applicable end-product standard. Design teams must address them during layout, not during certification.<\/p>\n<\/li>\n<li>\n<p>Integrated manufacturing workflows reduce compliance gaps by consolidating design, fabrication, assembly and documentation under one accountable partner with controlled BOMs and traceability.<\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/proactivepcb.com\/quote\/\">Request a quote<\/a> to review how Pro-Active Engineering\u2019s integrated workflow supports UL compliance from design through final assembly.<\/p>\n<\/li>\n<\/ul>\n<h2>UL 796: core standard for bare printed circuit boards<\/h2>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/dxcircuit.com\/blog-pcb-certifications-export-ul-ce-rcm.html\">UL 796 is the primary safety standard for printed wiring boards<\/a>. It covers bare substrates across all layer counts and substrate types. It functions as a component-level recognition program, not an end-product listing. Recognition confirms that the PCB substrate material and construction meet flammability and electrical safety criteria.<\/p>\n<p>UL recognition testing under UL 796 evaluates base materials for safety properties. After approval, manufacturers submit periodic reports tracking production changes. UL also conducts unannounced audits to maintain recognition status.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/queenems.com\/blog\/pcb-fabrication-certifications-guide\">Verification requires obtaining the supplier&#8217;s UL file number, typically beginning with &#8220;E,&#8221; and confirming it in the official UL Product iQ database<\/a>. This step confirms that recognition is active, site-specific and covers the precise construction being supplied.<\/p>\n<h2>End-product standards that govern PCB assemblies<\/h2>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/dxcircuit.com\/blog-pcb-certifications-export-ul-ce-rcm.html\">A UL-recognized bare board can be used inside a UL-listed product, but the final assembled product still receives its own UL evaluation and listing.<\/a> Assembly-level compliance is evaluated under the end-product standard that governs the equipment category.<\/p>\n<p>Common standards for regulated PCBA applications in the U.S. market include:<\/p>\n<ul>\n<li>\n<p><strong>UL 62368-1<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/infinitalab.com\/blog\/electrical-testing-laboratories-guide\">covers IT and electronic products at the equipment level and requires hipot, insulation resistance and leakage current testing for safety certification<\/a><\/p>\n<\/li>\n<li>\n<p><strong>UL 508A<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/ctb.co.at\/en\/knowledge\/ul-508a-sccr-explained\">is a standalone U.S. standard for industrial control panels that maps requirements onto the assembled panel and often functions as a prerequisite for insurance, OSHA acceptance and commissioning with U.S. customers<\/a><\/p>\n<\/li>\n<li>\n<p><strong>UL 60601-1<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/infinitalab.com\/blog\/electrical-testing-laboratories-guide\">is mandatory for medical electrical equipment and required for FDA 510(k) submissions and CE marking of medical devices<\/a><\/p>\n<\/li>\n<\/ul>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/pcbandassembly.com\/pcb-manufacturing\/medical-pcb\">Medical PCB assembly compliance is evaluated at the finished-device and assembly level, supported by IPC-A-610 Class 3, IPC-A-600, J-STD-001 and FDA 21 CFR Part 820 requirements alongside UL and IEC standards.<\/a><\/p>\n<h2>When UL listing becomes a practical requirement<\/h2>\n<p>The UL Recognized Component Mark applies to components and subassemblies intended for incorporation into a larger UL-listed end product, not as standalone finished-product approval. The UL Listed mark applies to complete products that have undergone full end-product evaluation.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/dxcircuit.com\/blog-north-america-pcb-import-guide.html\">UL recognition for bare boards is not legally required by U.S. Customs for import clearance but is de facto mandatory for end-product UL listing, retailer acceptance and OEM approved vendor lists.<\/a> In regulated industries such as aerospace, defense, medical and industrial control, the absence of UL recognition on a bare board creates a traceability and liability gap that can block supply chain qualification.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/epnp.de\/en\/ul-recognized-manufacturing\">UL Recognized Component (&#8220;UR&#8221;) marking applies to components and assemblies, including PCBAs, that are incorporated into UL-listed end products for the U.S. and Canadian markets, as distinct from UL Listed certification for finished products.<\/a> As noted earlier, recognition for components supports but does not replace listing for complete devices.<\/p>\n<h2>UL 94 flammability expectations for PCB materials<\/h2>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/eurocircuits.com\/what-about-ul\">UL 796 is the primary standard for printed circuit boards, while UL 94 covers flammability testing of plastics used in board construction<\/a>. The flammability classification assigned to the base material determines whether the board suits a given application category.<\/p>\n<p>Common UL 94 ratings and their general application context include:<\/p>\n<ul>\n<li>\n<p><strong>UL 94 V-0<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/eurocircuits.com\/what-about-ul\">self-extinguishes within a defined short interval after flame removal and does not drip flaming particles<\/a>. It is required for FR-4 materials in many regulated applications and is the standard expectation for UL-recognized boards in most commercial, industrial and medical contexts.<\/p>\n<\/li>\n<li>\n<p><strong>UL 94 V-1<\/strong> self-extinguishes within a longer defined interval. It is less stringent than V-0 and generally not accepted for high-reliability or regulated applications.<\/p>\n<\/li>\n<li>\n<p><strong>UL 94 V-2<\/strong> permits flaming drips. It is the least stringent vertical-burn classification and is rarely specified for professional electronics.<\/p>\n<\/li>\n<li>\n<p><strong>UL 94 5VA<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/dxcircuit.com\/blog-north-america-pcb-import-guide.html\">often appears in high-reliability applications<\/a> and represents the most stringent classification in the UL 94 series.<\/p>\n<\/li>\n<\/ul>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/epnp.de\/en\/ul-recognized-manufacturing\">UL 94 V-0 flammability classification is commonly specified for FR-4 base materials in regulated PCBA applications such as medical technology<\/a>. The flammability rating appears on the board marking alongside the UL file number to support traceability.<\/p>\n<h2>Thermal ratings: MOT and RTI for PCB materials<\/h2>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/ul.com\/services\/maintaining-momentum-when-preferred-materials-are-unavailable\">UL 746B, the Standard for Polymeric Materials, defines long-term thermal endurance testing that produces Relative Thermal Index (RTI) values used in UL recognition programs for polymeric materials in electrical equipment.<\/a><\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/ul.com\/services\/maintaining-momentum-when-preferred-materials-are-unavailable\">UL Yellow Cards provide verified public performance credentials for polymeric materials that include RTI values, flammability ratings and electrical, mechanical and environmental performance data for certification-aligned material selection.<\/a><\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/we-online.com\/en\/products\/printed-circuit-boards\/capabilities\/ul-certification\">Developers and manufacturers analyze the application and relevant standards, then define required properties such as flammability class, MOT and CTI before selecting the appropriate UL type for a printed circuit board.<\/a> The Maximum Operating Temperature (MOT) defines the upper continuous-use temperature limit for the board material. The RTI reflects long-term retention of electrical, mechanical or impact properties under thermal aging. Both values must align with the thermal environment of the end product.<\/p>\n<h2>Creepage, clearance and pollution degree for safe spacing<\/h2>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/electronicsdesign.au\/questions\/pcb-creepage-and-clearance-distances\">Clearance is the shortest distance through air between two conductors at different potentials, and creepage is the shortest distance between two conductors measured along the surface of the insulating material.<\/a> Both protect against arcing and surface tracking under operating conditions.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/electronicsdesign.au\/questions\/pcb-creepage-and-clearance-distances\">Creepage distance requirements depend on working voltage, pollution degree and the insulating material&#8217;s Comparative Tracking Index (CTI) material group per IEC 60112, with Material Group I (CTI \u2265 600) allowing the shortest distances and Material Group IIIb requiring the longest.<\/a><\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/electronicsdesign.au\/questions\/pcb-creepage-and-clearance-distances\">Standard FR-4 PCB laminate often falls in material groups that require increased creepage distances compared to higher-CTI materials.<\/a> Designers using FR-4 in high-voltage or high-pollution-degree environments must account for this when laying out spacing between conductors.<\/p>\n<p>Key pollution degree definitions that govern spacing requirements include:<\/p>\n<ul>\n<li>\n<p><strong>Pollution Degree 2<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/electronicsdesign.au\/questions\/pcb-creepage-and-clearance-distances\">covers normal indoor environments with occasional temporary condensation and serves as the default assumption for most consumer and commercial electronics in a housing<\/a><\/p>\n<\/li>\n<li>\n<p><strong>Pollution Degree 3<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/electronicsdesign.au\/questions\/pcb-creepage-and-clearance-distances\">applies to unsealed industrial or outdoor equipment where conductive pollution or condensation is expected<\/a><\/p>\n<\/li>\n<\/ul>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/electronicsdesign.au\/questions\/pcb-creepage-and-clearance-distances\">IEC 60664-1 tables for insulation coordination are structured around working voltage, pollution degree, material group and overvoltage category and are referenced by most product safety standards including IEC 62368-1 and IEC 60601-1.<\/a> Design teams should follow the applicable product safety standard&#8217;s referenced insulation-coordination requirements rather than relying on IPC-2221 tables alone.<\/p>\n<h2>Checklist: typical UL evaluation items for PCB assemblies<\/h2>\n<p>A UL evaluation of a PCB assembly addresses multiple interdependent criteria. The following checklist highlights primary evaluation items that engineers and compliance managers address before certification.<\/p>\n<ol>\n<li>\n<p><strong>Flammability classification<\/strong> confirm that base material carries the appropriate flammability rating, typically V-0 for regulated applications discussed earlier<\/p>\n<\/li>\n<li>\n<p><strong>Thermal performance verification<\/strong> confirm that material thermal ratings, including MOT and RTI, align with the operating environment defined in the end-product standard<\/p>\n<\/li>\n<li>\n<p><strong>Insulation coordination<\/strong> verify that conductor spacing meets IEC 60664-1 requirements for the applicable voltage, pollution degree and material group, then document the base material&#8217;s CTI classification to confirm that it supports the required creepage distances<\/p>\n<\/li>\n<li>\n<p><strong>UL file number traceability<\/strong> ensure that the UL Recognized Component mark, file number and control plan identifier appear on each board and tie back to the supplier&#8217;s active UL file<\/p>\n<\/li>\n<li>\n<p><strong>Board marking legibility<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/wevolver.com\/article\/ipc-a-610-acceptability-of-electronic-assemblies\">confirm that silkscreen markings, reference designators and revision identifiers remain legible and durable after assembly and cleaning, and that markings are readable through conformal coating for Class 3 applications<\/a><\/p>\n<\/li>\n<li>\n<p><strong>BOM and AML control<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/epnp.de\/en\/ul-recognized-manufacturing\">maintain controlled bills of materials, approved manufacturer lists and formal engineering change management with risk assessment for changes to UL-critical components<\/a><\/p>\n<\/li>\n<li>\n<p><strong>Hipot and isolation testing<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/infinitalab.com\/blog\/electrical-testing-laboratories-guide\">perform board-level electrical continuity and isolation testing, Surface Insulation Resistance testing per IPC TM-650 2.6.3 and solder joint resistance measurements to demonstrate the assembly&#8217;s role in product-level insulation and dielectric withstand performance<\/a><\/p>\n<\/li>\n<li>\n<p><strong>IPC-A-610 workmanship class<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/sunshineadapter.com\/quality-manufacturing\">apply IPC-A-610 Class 3 acceptability criteria for medical, aerospace and defense assemblies, which impose tighter solder joint, component placement and defect thresholds than the Class 2 default<\/a><\/p>\n<\/li>\n<li>\n<p><strong>Documentation package<\/strong> compile test reports, material certifications, UL file references and process approvals into a traceable record set that supports audit and end-product submission<\/p>\n<\/li>\n<\/ol>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/proactivepcb.com\/quote\/\"><strong>Request a quote<\/strong><\/a> to review how Pro-Active Engineering&#8217;s integrated workflow supports each evaluation item from design through final assembly.<\/p>\n<h2>Industry-specific mapping of UL and related standards<\/h2>\n<p>The applicable end-product standard and associated PCBA requirements vary by industry. The following summary outlines primary standard mapping for sectors served by Pro-Active Engineering.<\/p>\n<p><strong>Aerospace and defense<\/strong> Assemblies are evaluated under the end-product standard governing the equipment category. UL recognition for PCBs aligns with IPC-6012E qualification specifications for rigid printed boards and IPC-A-600K acceptability criteria, bridging voluntary standards with mandatory safety requirements. Class 3 workmanship applies. ITAR registration and full lot traceability are required for defense programs.<\/p>\n<p><strong>Medical devices<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/pcbandassembly.com\/pcb-manufacturing\/medical-pcb\">UL 60601-1 certification confirms that PCBs and electrical components used in medical devices meet defined safety and performance standards<\/a>. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/infinitalab.com\/blog\/electrical-testing-laboratories-guide\">IEC 60601-1 safety testing, including hipot and insulation verification, is mandatory for medical electrical equipment and required for FDA 510(k) submissions and CE marking<\/a>. ISO 13485 quality management requirements apply alongside the Class 3 workmanship requirements discussed earlier.<\/p>\n<p><strong>Industrial control<\/strong> <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/ctb.co.at\/en\/knowledge\/ul-508a-sccr-explained\">UL 508A maps requirements onto the assembled panel rather than the individual PCBAs inside it and often functions as a prerequisite for insurance, OSHA acceptance and commissioning with U.S. customers<\/a>. IPC-A-610 Class 2 is the typical workmanship baseline, while Class 3 is specified for safety-critical control functions.<\/p>\n<h2>Integrated manufacturing as a compliance strategy<\/h2>\n<p>Fragmented supply chains introduce compliance risk at every handoff. When design, fabrication, assembly, coating and testing are managed by separate vendors, documentation gaps accumulate and traceability weakens before the end-product submission package is assembled.<\/p>\n<p>Pro-Active Engineering consolidates design, prototyping, PCB assembly, conformal coating, testing and box build into a single workflow. Design for manufacturability is integrated from the earliest design phase, so spacing, material selection and marking requirements are addressed before fabrication begins rather than during certification review.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/epnp.de\/en\/ul-recognized-manufacturing\">Serial and lot traceability from incoming inspection through finished assembly, documenting machine setup records, soldering results, test reports and process approvals, supports audit-level traceability<\/a> throughout the product lifecycle. Pro-Active&#8217;s quality management system is certified to ISO 9001:2015 and AS9100, accredited by Nadcap and registered under ITAR, with JCP certification and alignment to NIST 800-171 for programs that require controlled data handling.<\/p>\n<p>For aerospace and defense customers, ITAR registration keeps technical data and controlled hardware within a secure, domestic manufacturing environment. Documentation control, approved manufacturer lists and engineering change management remain within a single accountable workflow rather than distributed across multiple vendors.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/proactivepcb.com\/quote\/\"><strong>Request a quote<\/strong><\/a> and connect with Pro-Active Engineering&#8217;s team to review compliance requirements for an upcoming program.<\/p>\n<h2>Frequently asked questions about UL and PCB assemblies<\/h2>\n<h3>What is the difference between a UL Recognized Component and a UL Listed product?<\/h3>\n<p>The UL Recognized Component Mark applies to components and subassemblies, including bare PCBs and PCBAs, that are intended for incorporation into a larger end product. Recognition confirms that the component meets defined safety criteria under standards such as UL 796 but does not approve the finished product. UL Listing applies to complete, standalone products that have undergone full end-product evaluation. A PCBA carrying the UL Recognized Component Mark still must be incorporated into a product that achieves its own UL Listing before sale as a finished device in the U.S. market.<\/p>\n<h3>What marking appears on a UL-recognized printed circuit board?<\/h3>\n<p>A UL-recognized bare PCB carries the UL Recognized Component Mark, the backward &#8220;UR&#8221; symbol, the manufacturer&#8217;s UL file number in the format E###### and the applicable flammability rating such as &#8220;94V-0.&#8221; These markings are typically applied in the silkscreen or solder mask layer and must remain legible after assembly and cleaning. For Class 3 high-reliability applications, markings must remain readable through any conformal coating applied after assembly. Uncontrolled or handwritten markings do not substitute for properly applied, documented identification.<\/p>\n<h3>How can a buyer verify that a PCB supplier&#8217;s UL recognition is current and valid?<\/h3>\n<p>Verification starts with obtaining the supplier&#8217;s UL file number and searching it in the official UL Product iQ database. The search result should confirm that recognition is active, that the specific factory location is covered and that the construction being supplied, including substrate type, layer count and copper weight, falls within the scope of the file. A recognition that is expired, suspended or mismatched to the actual construction does not satisfy UL requirements. Industry data indicates that a meaningful share of safety certificates presented by overseas brokers are expired, mismatched or fraudulent, which makes direct database verification essential.<\/p>\n<h3>How does an integrated manufacturing workflow reduce UL compliance risk?<\/h3>\n<p>When design, fabrication, assembly and documentation are managed by a single partner, compliance requirements are addressed systematically at each stage rather than late in the program. DFM review catches spacing, material and marking issues before fabrication. Controlled BOMs and approved manufacturer lists remain consistent throughout production. Test reports, material certifications and process records are compiled into a unified documentation package that supports end-product submission. Fragmented vendor chains introduce handoff points where documentation gaps accumulate, traceability breaks down and compliance deficiencies surface only during certification review, which increases cost and schedule impact.<\/p>\n<h3>Does UL 796 recognition cover the assembled PCB or only the bare board?<\/h3>\n<p>UL 796 recognition covers the bare PCB substrate only. It confirms that the board material and construction meet flammability, electrical and mechanical safety requirements at the component level. The assembled PCB, with components soldered, coated and integrated into the end product, is evaluated under the applicable end-product standard such as UL 62368-1 for IT and electronic equipment, UL 508A for industrial control panels or UL 60601-1 for medical electrical equipment. UL 796 recognition supports use of the board inside a UL-listed product but does not replace the end-product evaluation.<\/p>\n<h2>Conclusion: linking bare-board recognition to end-product success<\/h2>\n<p>UL compliance for printed circuit board assemblies depends on a clear boundary between bare-board recognition and end-product evaluation. UL 796 establishes the component-level baseline for bare substrates. UL 94 governs flammability classification of base materials. Creepage, clearance, MOT and RTI requirements flow from the applicable end-product standard, such as UL 62368-1, UL 508A or UL 60601-1, and must be addressed in design before fabrication begins. Traceability, marking and documentation control function as evaluated criteria that influence certification outcomes.<\/p>\n<p>Pro-Active Engineering&#8217;s integrated workflow, spanning design, rapid prototyping, assembly, coating, testing and box build, is structured to address these requirements within a single accountable domestic program. ISO 9001:2015, AS9100, Nadcap accreditation and ITAR registration support the documentation and traceability standards that regulated industries require.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/proactivepcb.com\/quote\/\"><strong>Request a quote<\/strong><\/a> to review program requirements with Pro-Active Engineering&#8217;s engineering and compliance team.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pro-Active Engineering&#8217;s integrated workflow covers UL 796, UL 94 V-0 and end-product standards from design through final assembly. Request a quote.<\/p>\n","protected":false},"author":68,"featured_media":284,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-419","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pcb-compliance-certification"],"_links":{"self":[{"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/posts\/419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/comments?post=419"}],"version-history":[{"count":2,"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/posts\/419\/revisions"}],"predecessor-version":[{"id":1216,"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/posts\/419\/revisions\/1216"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/media\/284"}],"wp:attachment":[{"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/media?parent=419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/categories?post=419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/proactivepcb.com\/articles\/wp-json\/wp\/v2\/tags?post=419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}