{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6123AUS","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6123AUS","canonicalUrl":"https://icboms.com/microchip/1N6123AUS","factsUrl":"https://icboms.com/api/mcp/products/1N6123AUS","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6123AUS, bidirectional Zener TVS diode, SQ-MELF B package, 500W peak pulse power, 38.8V reverse standoff, 70.1V clamping, -55°C to 175°C junction temperature.","salesMarkdown":"## Transient protection for harsh environments The single bidirectional channel means one device handles both positive and negative surges, which simplifies the BOM for AC-coupled or bipolar signal lines. Junction temperature range spans -55°C to 175°C, so this part fits avionics, downhole instrumentation, and outdoor telecom cabinets where the ambient can push past 125°C. The SQ-MELF B package is a surface-mount hermetic-style body — the ceramic-to-metal seal keeps moisture out, which matters for long-life deployments in humid or condensing environments. ## Clamping voltage and breakdown margin Reverse standoff voltage is 38.8V typical; breakdown occurs at a minimum of 48.5V. The clamping voltage at peak pulse current is 70.1V max — that 21.6V window between standoff and clamp gives the designer margin to place the TVS after a fuse or series resistor without nuisance triggering on normal line ripple. Peak pulse current capability is 7.1A for the 10/1000µs waveform. The 500W rating is the product of clamp voltage and peak current — a standard metric for comparing TVS diodes across package families. No power line protection is built in, so this device is intended for signal or low-power rail clamping, not mains-side suppression. ## Active production — no end-of-life pressure The base product number 1N6123 covers multiple voltage variants in the same SQ-MELF footprint, so if a different standoff voltage is needed later, the board layout stays the same. Package is — not tape-and-reel — so plan for manual or tube-fed placement. The SQ-MELF B body is a standard surface-mount footprint; the metal end caps are the anode and cathode terminals. Solder profile follows standard SnPb or Pb-free reflow for ceramic packages.","metaTitle":"1N6123AUS Zener TVS Diode – 500W Bidirectional, SQ-MELF","metaDescription":"1N6123AUS bidirectional Zener TVS diode from Microchip. 500W peak pulse power, 38.8V standoff, 70.1V clamp. Active production, SQ-MELF package.","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":"1N6123","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)":"48.5V","Voltage - Clamping (Max) @ Ipp":"70.1V","Voltage - Reverse Standoff (Typ)":"38.8V","Current - Peak Pulse (10/1000µs)":"7.1A"}},"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":"Does the 1N6123AUS provide bidirectional protection?","answer":"Yes — it is a single bidirectional channel. One device clamps both positive and negative transients, which is useful for AC signal lines, bipolar power rails, or any application where the surge polarity is unknown."},{"question":"What is the peak pulse power of the 1N6123AUS?","answer":"500W peak pulse power measured with a 10/1000µs waveform. The clamping voltage at that current is 70.1V max, and the peak pulse current is 7.1A."},{"question":"What package does the 1N6123AUS come in?","answer":"SQ-MELF, B case — a surface-mount hermetic-style package with metal end caps. The supplier device package is also designated B, SQ-MELF. Supplied in Bulk (not tape-and-reel)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6123AUS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6123AUS 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}}