{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6109US","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6109US","canonicalUrl":"https://icboms.com/microchip/1N6109US","factsUrl":"https://icboms.com/api/mcp/products/1N6109US","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6109US, Zener TVS diode, 500 W peak pulse power, 9.9 V reverse standoff, 19.11 V clamping, bidirectional, SQ-MELF surface-mount package.","salesMarkdown":"## 500 W Zener TVS in SQ-MELF — transient protection for general-purpose rails The 1N6109US: The 9.9 V reverse standoff voltage protects a 12 V rail, clamping transients at 19.11 V max while handling 26.13 A peak pulse current. The SQ-MELF (B, DO-213AB) package is a hermetic glass body suited for surface-mount assembly — the metalized end caps reflow directly to the PCB pad, no leads to bend. ## Clamp voltage and peak current — the surge budget At 26.13 A peak pulse current the diode clamps at 19.11 V max. For a 12 V nominal rail, that clamp margin (~7 V above standoff) means downstream components need a 20 V minimum breakdown rating to stay inside the safe operating area. The 500 W rating is the product of clamp voltage and peak current — derate above 25 °C per the datasheet curve. ## Active production — no LTB pressure Microchip lists the 1N6109US as Active. The SQ-MELF package is a standard Microchip TVS platform — same footprint as the 1N61xxUS family, so a BOM change to a different voltage variant (e.g., 1N6108US, 1N6110US) requires only a reel swap, not a board respin. ## SQ-MELF footprint — layout checklist The SQ-MELF (B, DO-213AB) is a two-terminal end-cap package. PCB land pattern: rectangular pads matching the metallized band width — typically 0.060″ × 0.100″ per end with a 0.100″ gap. Reflow profile follows standard SnAgCu solder; the hermetic glass body handles 175 °C junction temperature without moisture sensitivity concerns. No MSL classification — the glass seal is impervious to humidity.","metaTitle":"1N6109US Zener TVS Diode - Microchip, 500W, SQ-MELF","metaDescription":"Microchip 1N6109US Zener TVS diode, 500W peak pulse power, 9.9V standoff, 19.11V clamp, bidirectional, SQ-MELF surface mount. Active production.","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":"1N6109","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)":"11.73V","Voltage - Clamping (Max) @ Ipp":"19.11V","Voltage - Reverse Standoff (Typ)":"9.9V","Current - Peak Pulse (10/1000µs)":"26.13A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.2400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5dbd5050221203b922ebce5a7a6e86e6.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6109US","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6109US 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}}