{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE43A-E3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE43A-E3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43A-E3-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE43A-E3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® TVS diode, Type Zener, 1.5KE43A-/54, 1500W peak pulse, 36.8V reverse standoff, DO-201AA axial, Through Hole.","salesMarkdown":"## Protection envelope and trigger thresholds The 1.5KE43A-E3/54: The 1.5KE43A-/54 is a 1500 W peak-pulse-power TransZorb TVS diode from Vishay, rated for a 36.8 V reverse standoff voltage and a 40.9 V minimum breakdown voltage. When a transient exceeds the breakdown threshold, the diode clamps at 59.3 V maximum while shunting 25.3 A of peak pulse current (10/1000 µs waveform). That clamping ceiling tells you the downstream rail sees no more than 59.3 V during the event — critical for sizing the DC bus capacitors and the downstream converter's input rating. The 36.8 V standoff is the maximum continuous DC voltage the diode blocks without conducting leakage — a 36 V nominal rail sits comfortably below this, but a 48 V telecom bus would exceed it and cause the diode to conduct during normal operation. The 40.9 V minimum breakdown ensures the avalanche triggers before the rail sees damage, with margin for temperature and manufacturing tolerance. ## Temperature range and package for harsh environments The DO-201AA axial-lead package (DO-27 equivalent) is a through-hole form factor that survives high-vibration environments better than a surface-mount SOD-123 — the leads absorb mechanical stress before it reaches the die. The single unidirectional channel protects one rail per device. For bidirectional or AC-line protection, two devices back-to-back or a dedicated bidirectional variant is needed. ## Active production and sourcing posture No pin-compatible second source is documented, but the TransZorb series covers a wide voltage range, so a parametric cross-reference to a different standoff voltage would require a board-level review of the clamped voltage margin.","metaTitle":"1.5KE43A-E3/54 Vishay TVS, 1.5kW, 36.8V Standoff","metaDescription":"Vishay 1.5KE43A-E3/54 TransZorb TVS diode, 1500W peak pulse, 36.8V reverse standoff, DO-201AA axial. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE43","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"40.9V","Voltage - Clamping (Max) @ Ipp":"59.3V","Voltage - Reverse Standoff (Typ)":"36.8V","Current - Peak Pulse (10/1000µs)":"25.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3246","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 1.5KE43A-/54 and check stock?","answer":"The 1.5KE43A-/54 is sourced to order against your BOM quantity. Submit an RFQ for a real-time stock check and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43A-E3-54","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43A-E3-54 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}}