{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6128AUS","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6128AUS","canonicalUrl":"https://icboms.com/microchip/1N6128AUS","factsUrl":"https://icboms.com/api/mcp/products/1N6128AUS","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6128AUS, Zener TVS diode, 500W peak pulse power, bidirectional, 62.2V reverse standoff, SQ-MELF B surface-mount package, active production.","salesMarkdown":"## Active Zener TVS in a compact surface-mount package The 1N6128AUS is a Zener-type transient voltage suppressor from Microchip Technology, designed for general-purpose circuit protection. The 77.9V minimum breakdown voltage sets the trigger threshold — the device starts conducting just above that level. A single bidirectional channel means it protects both polarities on a line, useful for AC-coupled signals or data pairs where the transient can swing either way. ## Parametric fit for your protection window The 62.2V standoff voltage is the maximum DC or peak AC voltage the protected line can carry without the TVS conducting — design the rail to stay below this. The 112.8V clamping voltage at 4.4A peak pulse current defines the worst-case voltage the downstream circuitry sees during a surge. The SQ-MELF B package is a surface-mount ceramic body with good solder-joint reliability and a small footprint — no through-hole hole drilling needed. ## Sourcing and supply posture The base product number is 1N6128, and the 'AUS' suffix indicates the surface-mount SQ-MELF variant. The package is Bulk, so orders come in tube or tray quantities rather than tape-and-reel.","metaTitle":"1N6128AUS Zener TVS Diode – 500W, Bidirectional, SQ-MELF","metaDescription":"Active-production 1N6128AUS from Microchip: Zener TVS, 500W peak pulse, 62.2V standoff, bidirectional, SQ-MELF B package. Sourced per 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":"1N6128","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)":"77.9V","Voltage - Clamping (Max) @ Ipp":"112.8V","Voltage - Reverse Standoff (Typ)":"62.2V","Current - Peak Pulse (10/1000µs)":"4.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.0750","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5dbd5050221203b922ebce5a7a6e86e6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the peak pulse power of the 1N6128AUS?","answer":"500W peak pulse power measured with a 10/1000 µs waveform. This rating tells you the energy the device can absorb in a single surge event — enough for typical industrial transient protection on 48V or 60V rails."},{"question":"Is the 1N6128AUS bidirectional?","answer":"Yes, it has a single bidirectional channel. That means it clamps both positive and negative transients on the same line — no need to orient the device or use two unidirectional parts back-to-back."},{"question":"Can the 1N6128AUS replace the 1N6128?","answer":"The 1N6128AUS is the surface-mount SQ-MELF version of the base 1N6128. The electrical specs — breakdown, clamping, standoff — are the same. The difference is the package: the 'AUS' suffix means SQ-MELF for SMD assembly, while the base 1N6128 is typically a through-hole package. If your board is laid out for a surface-mount footprint, the 1N6128AUS is the direct fit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6128AUS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6128AUS 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}}