{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ43","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ43","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ43","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ43","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor Zener TVS diode, 1.5 kW peak pulse, 43 V standoff, 76.7 V clamping max, 19.6 A peak pulse, unidirectional, DO-214AB SMC surface mount, -50°C to 150°C junction.","salesMarkdown":"## What the clamping voltage means for your downstream circuit The 1.5SMCJ43: The diode breaks down conductively at 47.8 V minimum, so a 48 V bus that spikes will see the TVS transition from leakage to conduction within that window; the 43 V typ reverse standoff gives you the design margin between nominal operating voltage and the onset of protection. Rated 1500 W at a 10/1000 µs surge waveform — this is a standard telecom and industrial protection spec, not an automotive 8/20 µs pulse, so the peak current of 19.6 A is tied to that specific double-exponential shape; if your loaddump or inductive kick waveform has a different energy content, derate accordingly using the datasheet curves. The 150°C maximum junction temperature means the PCB pad under the SMC body must be kept cool enough that the device stays below that limit during clamped events — on a poorly thermal-managed board the clamping voltage rises and protection performance degrades. ## DO-214AB footprint and unidirectional protection topology The DO-214AB (SMC) package is the standard 2-pin unidirectional TVS footprint — pin 1 is the cathode (protected line), pin 2 is the anode (ground); the single-channel unidirectional configuration protects the line against positive transients relative to ground but does not clamp negative events the way a bidirectional device does. Classified as general-purpose, not a safety-rated or automotive-qualified device — the absence of a power-line-protection flag means it is not UL-recognized or IEC 62368 tested for equipment-side overvoltage protection in mains-adjacent circuits.","metaTitle":"1.5SMCJ43 TVS Diode, 43V standoff, 76.7V clamp","metaDescription":"Diotec 1.5SMCJ43 unidirectional TVS, 1500W peak pulse, 43V standoff, clamping 76.7V max at 19.6A. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diotec Semiconductor","Type":"Zener","Series":"-","Package":"Strip","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Operating Temperature":"-50°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC/DO-214AB","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"47.8V","Voltage - Clamping (Max) @ Ipp":"76.7V","Voltage - Reverse Standoff (Typ)":"43V","Current - Peak Pulse (10/1000µs)":"19.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ43","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ43 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}}