{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6146AUS","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6146AUS","canonicalUrl":"https://icboms.com/microchip/1N6146AUS","factsUrl":"https://icboms.com/api/mcp/products/1N6146AUS","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6146AUS, Zener TVS diode, 1500W peak pulse power, 11.4V reverse standoff, 21V clamping at 71.4A, SQ-MELF surface mount, -55°C to 175°C, Active","salesMarkdown":"## Surge-rated Zener TVS in a hermetic MELF It clamps at 21V maximum while conducting 71.4A peak pulse current, protecting a 11.4V nominal rail. The ceramic MELF body handles the thermal shock of repetitive surges better than plastic SMD packages — important if this sits on a 12V bus in an avionics or industrial control board. ## Clamping voltage and breakdown margin Minimum breakdown voltage is 14.25V, giving a 2.85V guard band above the 11.4V standoff. That margin keeps the diode out of conduction during normal rail ripple while still firing before the downstream silicon sees damaging overvoltage. The 21V clamp at 71.4A is the worst-case let-through — your downstream capacitor or regulator must survive that peak for the pulse duration. ## Active production — no obsolescence watch needed Microchip lists the 1N6146AUS as Active. The SQ-MELF package is a standard Microchip TVS footprint, so supply continuity is stable. For BOM planning, the base product number is 1N6146 — the 'AUS' suffix denotes the surface-mount variant. ## Hermetic MELF — rework and board-fit notes The SQ-MELF, C package is a ceramic cylinder with wrap-around metallised terminations. It reflows well with standard solder paste — no fine-pitch alignment needed. The ceramic body absorbs less moisture than plastic, so no bake-out before reflow. Pin 1 orientation is marked by a band on the cathode end; the bidirectional version has no polarity, so orientation is irrelevant for the clamping function. The cylindrical shape can roll during pick-and-place if the vacuum nozzle isn't centred — confirm your feeder tape pocket holds it securely.","metaTitle":"1N6146AUS Zener TVS Diode – 1500W, 11.4V Standoff, SQ-MELF","metaDescription":"1N6146AUS from Microchip Technology: Zener TVS diode, 1500W peak pulse power, 11.4V reverse standoff, 21V clamping at 71.4A.","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, C","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6146","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"C, SQ-MELF","Voltage - Breakdown (Min)":"14.25V","Voltage - Clamping (Max) @ Ipp":"21V","Voltage - Reverse Standoff (Typ)":"11.4V","Current - Peak Pulse (10/1000µs)":"71.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$21.6000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://www.microsemi.com/document-portal/doc_download/127854-1n6138us-1n6173aus-tvs-diode-series-datasheet","sourceUrl":null},"ai":{"faq":[{"question":"What package and mounting type does 1N6146AUS use?","answer":"It comes in a surface-mount SQ-MELF, C package. The ceramic body is cylindrical with metallised end caps — no leads, designed for reflow soldering. The supplier device package is also designated C, SQ-MELF."},{"question":"Is 1N6146AUS a bidirectional or unidirectional device?","answer":"It has 1 bidirectional channel. That means it clamps both positive and negative transients symmetrically — useful for AC-coupled signal lines or DC rails where reverse polarity protection is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6146AUS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6146AUS 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}}