{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6291A","brand":"onsemi","brandSlug":"onsemi","productSlug":"1N6291A","canonicalUrl":"https://icboms.com/onsemi/1N6291A","factsUrl":"https://icboms.com/api/mcp/products/1N6291A","rawCanonicalId":null},"summary":{"shortDescription":"onsemi Mosorb™ series, Zener TVS diode, 1N6291A, 1500W peak pulse power, 58.1V reverse standoff, 92V clamping, DO-201AD axial, through-hole, -65°C~175°C junction temperature.","salesMarkdown":"## 1N6291A — 1500W Zener TVS in DO-201AD The 1N6291A is an onsemi Mosorb™ Zener transient-voltage-suppression diode rated for 1500W peak pulse power at 10/1000 µs waveform. That 1.5 kW rating means it can absorb a substantial surge without failing — the key metric for protecting a DC rail or signal line against lightning-induced transients or inductive load dumps. Three voltages define the protection window: reverse standoff is 58.1V — this is the maximum DC voltage the diode will not conduct at. Breakdown minimum is 64.6V (the avalanche threshold). Clamping maximum at rated Ipp is 92V — the peak voltage the protected circuit sees during a surge. For a 48V nominal bus with transients, this diode clamps hard before the downstream silicon fails. Single unidirectional channel in a DO-201AD axial package with through-hole mounting. Junction temperature range -65°C to 175°C suits military, avionics, and industrial environments where the ambient can swing wide. ## Obsolete — sourcing through independent channels onsemi lists the 1N6291A as Obsolete. The only supply path is the independent market: surplus stock, decommissioned inventory, or broker-sourced material. We can source and quote against your BOM quantity; availability and pricing confirmed at RFQ time. The wide junction temperature range (-65°C to 175°C) and 1500W pulse rating mean this part was often used in high-reliability designs. If you are filling a legacy BOM, the obsolete status is the main risk — confirm the quantity needed and we will search our network for verified stock. ## Package and mounting — DO-201AD axial DO-201AD (also known as R-6) is a through-hole axial package — the body is about 9.1 mm long with 1.3 mm diameter leads. Hand-solder or wave-solder; the leads must be formed for through-hole PCB mounting or point-to-point wiring. No surface-mount variant exists in this series. The through-hole form factor makes it straightforward to replace in a retrofit or repair scenario — no reflow profile needed, just a soldering iron and a desoldering tool.","metaTitle":"1N6291A onsemi Mosorb™ Zener TVS Diode 1500W DO-201AD","metaDescription":"onsemi 1N6291A Mosorb™ Zener TVS, 1500W peak pulse power, 58.1V standoff, 92V clamping, DO-201AD axial. Obsolete — source via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"Mosorb™","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6291","Operating Temperature":"-65°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"64.6V","Voltage - Clamping (Max) @ Ipp":"92V","Voltage - Reverse Standoff (Typ)":"58.1V","Current - Peak Pulse (10/1000µs)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1ce676890a04bce4da4e0ab60f37b157.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the 1N6291A or check stock?","answer":"The 1N6291A is obsolete per onsemi. We do not hold stock on the shelf, but we can source it from the independent market and quote against your BOM quantity. Submit an RFQ with your target volume and we will confirm availability and pricing."},{"question":"What is the difference between 1N6291 and 1N6291A?","answer":"The 'A' suffix on the 1N6291A indicates a tighter tolerance on the breakdown voltage. The 1N6291 (non-A) has a broader breakdown range; the 1N6291A guarantees the breakdown minimum at 64.6V. Both share the same 1500W pulse rating and DO-201AD package."},{"question":"What package does the 1N6291A come in?","answer":"DO-201AD axial, through-hole. The supplier device package is also listed as Axial."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/1N6291A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/1N6291A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:22:05.650Z","lastPublished":"2026-07-17T20:22:05.650Z","indexable":true}}