{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91A B0G","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5KE91A-B0G","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE91A-B0G","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91A%20B0G","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor 1.5KE Series, Type Zener, 1.5KE91A B0G, 1500W (1.5kW) peak pulse power, 77.8V reverse standoff, 125V clamping, DO-201AA/DO-27 axial, Bulk.","salesMarkdown":"## 1500 W clamping margin in a DO-201 axial package The 1.5KE91A B0G is a unidirectional Zener-type TVS from Taiwan Semiconductor's 1.5KE series, rated for 1500 W (1.5 kW) peak pulse power across a 10/1000 µs waveform. It clamps transients at 125 V maximum when hit with a 12.6 A peak pulse current, starting from a 77.8 V reverse standoff level. The breakdown voltage window runs 86.5 V minimum, so for a nominal 78 V rail you have margin above the operating voltage before the diode begins conducting. ## What the clamping and standoff numbers mean for your rail Reverse standoff of 77.8 V means the diode stays effectively off on a 75 V or 78 V nominal bus, leaking only until the transient pushes past the breakdown threshold at 86.5 V minimum. The 125 V clamping voltage is the worst-case peak the protected circuit sees — anything downstream must survive at least 125 V for the pulse duration. At 12.6 A peak pulse current (10/1000 µs), the 1500 W rating is derived as Vclamp × Ipp, so the actual energy the diode absorbs depends on the surge impedance. Power line protection is listed as No — this is a signal-line or DC-bus TVS, not designed for continuous AC mains clamping. For a 48 V telecom bus or a 72 V industrial DC rail it provides a single-direction clamp; the unidirectional configuration (one channel) means you get one diode per package, so bipolar rails require two parts back-to-back.","metaTitle":"1.5KE91A B0G TVS Diode, 1500W, 77.8V Standoff, DO-201","metaDescription":"Taiwan Semiconductor 1.5KE91A B0G unidirectional TVS: 1500W peak pulse, 77.8V standoff, 125V clamp, DO-201 axial. Active, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Taiwan Semiconductor Corporation","Type":"Zener","Series":"1.5KE","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE91","Operating Temperature":"-55°C ~ 175°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a688563676897fea683fa9d5a5542f4e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE91A%20B0G/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 1.5KE91A B0G and get a price?","answer":"This part is available to order through independent and authorized distribution. Submit an RFQ with your target quantity and we will confirm current pricing and availability from our supply network."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE91A-B0G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/taiwan-semiconductor-corporation/1.5KE91A-B0G when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}