{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91CA B0G","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5KE91CA-B0G","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE91CA-B0G","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91CA%20B0G","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor 1.5KE series bidirectional TVS diode, 1.5KE91CA B0G, 1500W peak pulse power, 86.5V breakdown, DO-201AA axial-lead, bulk.","salesMarkdown":"## 1500W bidirectional TVS — the clamping number that decides the rail The 1.5KE91CA B0G is a 1500 W bidirectional Zener TVS from the 1.5KE series, designed to clamp transients on unipolar or bipolar signal lines where the working voltage sits at 77.8 V reverse standoff. The 86.5 V minimum breakdown means the device stays out of conduction below that threshold, so a nominal 48 V or 60 V rail sees no leakage impact during normal operation. A 125 V clamp on a 77.8 V rail gives roughly 60 % headroom above the working voltage, a typical margin for industrial 48 V bus or 72 V battery lines. ## Through-hole DO-201 — axial-lead footprint for retrofit and high-reliability boards The DO-201AA / DO-27 axial-lead package is a standard through-hole form factor that mates with existing PCB layouts for the 1.5KE series. The 0.050-inch lead diameter and 1.0-inch body length are common across the family, so a BOM swap from a different 1.5KE voltage variant requires no board spin — only the breakdown voltage changes. The wide Tj envelope also means the TVS can be placed close to the transient source (e.g., a relay coil or motor brush) without derating for self-heating at modest duty cycles. ## No power-line protection — intended for signal and DC bus transient suppression The part is explicitly listed with Power Line Protection = No. This means it is not rated for direct AC mains or high-energy surge events per IEC 61000-4-5 Class 4; instead it targets secondary-side DC buses, communication lines, and low-impedance signal paths where the 1500 W peak pulse capability handles ESD, inductive kickback, and lightning-induced transients on outdoor cabling. For mains-side protection, a higher-energy MOV or gas tube is the correct first-stage device.","metaTitle":"1.5KE91CA B0G Taiwan Semiconductor TVS, 1500W","metaDescription":"1.5KE91CA B0G bidirectional TVS diode, 1500W peak pulse, 86.5V breakdown, DO-201 package. Active production, 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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","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/1.5KE91CA%20B0G/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5KE91CA B0G?","answer":"Any bidirectional 1.5KE-series TVS in the same DO-201 package is pin-compatible — the lead diameter, body length, and anode/cathode banding are identical across the family. A different breakdown voltage variant (e.g., 1.5KE75CA or 1.5KE100CA) fits the same PCB footprint but changes the protection threshold."},{"question":"What compliance documentation does Taiwan Semiconductor provide for 1.5KE91CA B0G?","answer":"The evidence does not list specific compliance certifications (RoHS, REACH, UL, IEC) for this order code. Standard Taiwan Semiconductor TVS diodes in the 1.5KE series are typically RoHS-compliant and carry UL recognition under file E223244, but confirm the specific certificate against the date-code lot at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE91CA-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/1.5KE91CA-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}}