{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6468US","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6468US","canonicalUrl":"https://icboms.com/microchip/1N6468US","factsUrl":"https://icboms.com/api/mcp/products/1N6468US","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6468US Zener diode, 500W peak pulse power, 51.6V reverse standoff, 78.5V clamping, unidirectional, SQ-MELF surface-mount package, -55°C to 175°C junction temperature.","salesMarkdown":"## 500W peak pulse power — the surge capacity that protects the rail That surge capacity is what keeps a 48V or 52V DC bus from exceeding the downstream regulator's absolute maximum input during a load-dump or lightning-coupled transient. ## Clamping voltage and standoff — the two numbers that set the protection window Reverse standoff voltage is 51.6V typical — the part will not conduct appreciable leakage below that rail voltage. When a transient exceeds breakdown (54V min), the diode clamps at 78.5V max. That clamp ceiling is the voltage the protected circuit must survive; a 60V-rated MOSFET on the rail would need a derating check. The junction temperature range spans -55°C to 175°C, covering military, avionics, and downhole environments where the board sees both cold soak and hot-side exhaust. No power line protection — this is a signal or low-power rail clamp, not a mains-side TVS. ## SQ-MELF package — hermetic body for harsh mounting The SQ-MELF (B case) is a surface-mount package with a cylindrical ceramic body and metallised end caps. It is hermetic by design, which matters for high-reliability applications where moisture ingress into a plastic package would be unacceptable. The mounting footprint differs from a standard SOD-123 or SMB — the MELF end-cap solder joint is sensitive to tombstoning if the pad geometry and reflow profile are not matched to the cylindrical shape. ## Active production — no end-of-life watch needed The base product number is 1N6468, and the US suffix indicates the SQ-MELF package variant.","metaTitle":"1N6468US Zener Diode – Microchip, 500W, SQ-MELF","metaDescription":"1N6468US from Microchip Technology: Zener diode, 500W peak pulse power, 51.6V standoff, 78.5V clamp. Active production. SQ-MELF surface mount. Request RFQ.","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":"1N6468","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"B, SQ-MELF","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"54V","Voltage - Clamping (Max) @ Ipp":"78.5V","Voltage - Reverse Standoff (Typ)":"51.6V","Current - Peak Pulse (10/1000µs)":"35A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.4650","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e5a65fed8a348402165405cc04f9ecf4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is 1N6468US a unidirectional zener?","answer":"Yes — it has one unidirectional channel (cathode to ground). The breakdown voltage is 54V min, clamping at 78.5V max. For bidirectional clamping on an AC signal line, you would need two devices back-to-back or a different part."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6468US","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6468US 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}}