{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE43CA/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE43CA-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43CA-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE43CA%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® series, TVS Zener, bidirectional, 1500W peak pulse, 36.8V reverse standoff, DO-201AA axial, through hole, tape and reel.","salesMarkdown":"## Clamping specs for a 36.8 V rail The 1.5KE43CA/54: Its 36.8 V reverse standoff voltage means it sits across a nominal 36 V DC bus and stays out of the way until a transient pushes the line above 40.9 V breakdown, then clamps at 59.3 V while shunting 25.3 A peak pulse current. That 59.3 V clamp ceiling is the number to check against the downstream device's abs-max rating — if the protected IC can survive 60 V for the pulse duration, this part fits. The bidirectional construction means a single device guards both polarities, useful on AC-coupled signal lines or floating DC rails where the return isn't grounded. ## Obsolete — sourcing through surplus channels Vishay lists the 1.5KE43CA/54 as obsolete. ## Through-hole axial — hand-solderable and breadboard-friendly The DO-201AA (DO-27) axial leaded package is a through-hole part — easy to hand-solder, fits standard 0.100-inch pitch perfboard, and the leads can be bent to fit existing PCB layouts. No reflow profile needed, no stencil. Power line protection is not listed — this is a signal- or low-power-rail TVS, not a mains surge suppressor.","metaTitle":"1.5KE43CA/54 TVS Diode, 1500W, 36.8V Standoff, DO-201AA","metaDescription":"Vishay 1.5KE43CA/54 TransZorb® bidirectional TVS, 1500W peak pulse, 36.8V reverse standoff, 59.3V clamp. Obsolete — sourced to order. RFQ for availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest alternative to the 1.5KE43CA/54?","answer":"A parametric substitute from the same TransZorb series with the same 36.8 V reverse standoff and DO-201AA package is the closest functional match — confirm the clamp voltage and peak pulse current against your rail's transient requirements before substituting."},{"question":"What does the 1500 W peak pulse rating mean in practice?","answer":"The 1500 W rating is measured with a 10/1000 µs waveform — a standard telecom surge. For shorter pulses (like an 8/20 µs ESD strike), the device can absorb much higher peak power. The 25.3 A peak pulse current at the 59.3 V clamp level gives the actual energy the part can shunt in that waveform."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43CA-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/1.5KE43CA-54 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}