{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE43A/B","brand":"YAGEO","brandSlug":"yageo","productSlug":"1.5KE43A-B","canonicalUrl":"https://icboms.com/yageo/1.5KE43A-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE43A%2FB","rawCanonicalId":null},"summary":{"shortDescription":"YAGEO 1.5KE series Zener TVS diode, unidirectional, 1.5KE43A/B, 1500W peak pulse power, 36.8V standoff, DO-201AA axial through-hole.","salesMarkdown":"## Clamping voltage and peak pulse current — the real protection ceiling The 1.5KE43A/B: At that power level the clamping voltage reaches 59.3V at a peak pulse current of 25.6A, which sets the maximum transient the protected line sees before the diode conducts. The reverse standoff voltage is 36.8V, so the diode stays high-impedance on a nominal 36V rail. Breakdown occurs between 40.9V and the clamping limit — the device starts conducting just above the rail voltage and holds the clamp below 60V across the full surge current. ## Package, mounting, and board-fit note Supplied in a DO-201AA (DO-27) axial leaded package, through-hole mount. The DO-201 body is the same footprint used across the 1.5KE family, so a single board layout serves multiple voltage variants. The axial leads require a hole diameter of roughly 1.0 mm to 1.2 mm on the PCB — standard for a 1500W TVS. The 1.5KE series is widely second-sourced, but no official cross-reference is recorded here — verify the clamping voltage and standoff match your rail before substituting.","metaTitle":"YAGEO 1.5KE43A/B Zener TVS, 1500W, DO-201","metaDescription":"YAGEO 1.5KE43A/B unidirectional Zener TVS diode, 1500W peak pulse power, 36.8V standoff, DO-201 package. Active lifecycle, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"YAGEO","Type":"Zener","Series":"1.5KE","Package":"Box","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 ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","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)":"25.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1226","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7e7401a50e18f12b75b7097fbc4378a1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5KE43A/B in this Circuit Protection family?","answer":"Any unidirectional TVS in the 1.5KE series with the same DO-201 package is pin-compatible, but the clamping voltage and standoff must match your rail. The 1.5KE43A/B is the 43V variant (36.8V standoff); a 1.5KE39A (33.3V standoff) or 1.5KE47A (40.2V standoff) would fit the same footprint but clamp at different thresholds. No official second-source part number is recorded here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/yageo/1.5KE43A-B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/yageo/1.5KE43A-B 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}}