{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6111US","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6111US","canonicalUrl":"https://icboms.com/microchip/1N6111US","factsUrl":"https://icboms.com/api/mcp/products/1N6111US","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6111US, Zener TVS diode, bidirectional, 500W peak pulse power, 12.2V reverse standoff, 14.44V min breakdown, SQ-MELF surface mount, -55°C to 175°C.","salesMarkdown":"## Transient protection for harsh environments The 1N6111US is a bidirectional Zener TVS diode from Microchip Technology, designed to clamp transients on signal or power lines in general-purpose circuit protection. Its 500 W peak pulse power rating (10/1000 µs waveform) and 12.2 V reverse standoff voltage make it a fit for 12 V nominal rails where a surge event must be shunted before the downstream circuitry sees overvoltage. The device is rated for continuous operation from -55°C to 175°C junction temperature, covering the full military temperature envelope. That range suits avionics, downhole instrumentation, and outdoor telecom where the ambient can swing well beyond commercial limits. ## Clamping voltage and breakdown margin Breakdown voltage is guaranteed at 14.44 V minimum, with a maximum clamping voltage of 23.42 V at the peak pulse current of 21.28 A. The 8.98 V spread between breakdown and clamp means the designer must verify that the protected load's absolute maximum rating stays above the clamp ceiling under worst-case surge. Because it is bidirectional, a single device protects AC-coupled lines or bipolar signal pairs without needing two series diodes. No power line protection is claimed, so this part is intended for signal or low-power auxiliary rails, not mains-side suppression. ## Active production – no obsolescence risk Microchip lists the 1N6111US as Active. For a BOM line that must remain stable across a multi-year production run, this part does not carry a looming LTB deadline. The SQ-MELF package is a surface-mount ceramic barrel with solderable end caps. It is compatible with standard reflow profiles but the ceramic body has a higher thermal mass than plastic SMD packages – the rework lab should preheat the board to 150°C before hot-air removal to avoid thermal shock cracking the MELF body.","metaTitle":"1N6111US Zener TVS – 500W, 12.2V Standoff, SQ-MELF","metaDescription":"1N6111US bidirectional Zener TVS diode from Microchip Technology. 500W peak pulse power, 14.44V min breakdown, 12.2V reverse standoff.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Microchip Technology","Type":"Zener","Series":"-","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, B","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"500W","Base Product Number":"1N6111","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"B, SQ-MELF","Voltage - Breakdown (Min)":"14.44V","Voltage - Clamping (Max) @ Ipp":"23.42V","Voltage - Reverse Standoff (Typ)":"12.2V","Current - Peak Pulse (10/1000µs)":"21.28A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.2400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5dbd5050221203b922ebce5a7a6e86e6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the 1N6111US bidirectional or unidirectional?","answer":"It is a single bidirectional channel. The same device clamps both positive and negative transients, which is useful for AC signal lines or bipolar supplies where polarity is not fixed."},{"question":"What package does the 1N6111US come in?","answer":"The package is rated for the full -55°C to 175°C temperature range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6111US","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6111US when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}