{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6279AG","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1N6279AG","canonicalUrl":"https://icboms.com/littelfuse-inc/1N6279AG","factsUrl":"https://icboms.com/api/mcp/products/1N6279AG","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. Mosorb™ Zener TVS diode, 1N6279AG, unidirectional, 18.8V standoff, 20.9V breakdown min, 30.6V clamping max @ 1.5kW peak pulse, -65°C to 175°C junction, DO-201AD axial through-hole, bulk.","salesMarkdown":"## What the voltage ratings mean for circuit protection The 1N6279AG is a unidirectional Zener-type transient voltage suppressor — it clamps the line when the input exceeds the breakdown threshold, shunting the surge energy to ground and protecting downstream circuitry. That 30.6 V ceiling is what the downstream circuit must survive — it defines the clamping stress the protected load sees during a surge event. ## Peak pulse power and temperature margin Note that Power Line Protection is listed as No — this part is intended for general-purpose signal or component-level protection, not for direct AC mains protection. For line-frequency power rail clamping, a dedicated TVS with higher energy rating and appropriate safety certifications would be required. ## Axial DO-201AD package and through-hole assembly The DO-201AD axial package mounts vertically through the PCB and is hand-soldered or wave-soldered in production. Lead bending is straightforward, but the body is glass-bodied — avoid prolonged direct contact with the hot-air nozzle above 260 °C to prevent cracking the glass seal. The axial leads are spaced at the standard 10.16 mm (0.400-inch) lead pitch typical of this package family, so the PCB pad footprint follows the DO-201AD land pattern — verify pad size against the land pattern drawing before committing to a new layout, especially on reflow-only assembly where solder fillet formation differs from wave. ## Lifecycle status and sourcing posture The 1N6279AG carries an Obsolete product status. Independent distribution channels maintain lot-specific surplus inventory; availability and current pricing are confirmed against an RFQ. Board-rework shops sourcing this part for repair or legacy service should verify lead/tin status and any applicable RoHS exemptions for the target application.","metaTitle":"Littelfuse 1N6279AG Zener TVS, 18.8V Standoff, DO-201AD","metaDescription":"1N6279AG is an obsolete Littelfuse Mosorb unidirectional Zener TVS diode, 1500W peak pulse, 18.8V standoff, 30.6V clamping, DO-201AD axial.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"Mosorb™","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6279A","Operating Temperature":"-65°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"20.9V","Voltage - Clamping (Max) @ Ipp":"30.6V","Voltage - Reverse Standoff (Typ)":"18.8V","Current - Peak Pulse (10/1000µs)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b2bad05ac2a782d44789dbfb00c46ecc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6279AG/alternatives.json"},"ai":{"faq":[{"question":"What series does the 1N6279AG belong to?","answer":"It is part of the Littelfuse Mosorb series — a family of unidirectional Zener TVS diodes in axial packages rated for general-purpose transient protection. The Mosorb designation indicates a glass-passivated junction for long-term stability."},{"question":"Can I get current pricing and availability for 1N6279AG?","answer":"Pricing and availability are confirmed at RFQ through independent distribution channels holding surplus or remaining-stock lots. Lot traceability and date codes vary — confirm requirements at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1N6279AG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1N6279AG when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T16:48:13.243Z","lastPublished":"2026-07-22T16:48:13.243Z","indexable":true}}