{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ43A-AQ","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ43A-AQ","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ43A-AQ","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ43A-AQ","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor, Zener TVS diode, 1.5SMCJ43A-AQ, unidirectional 1-channel, 43V reverse standoff, 69.4V clamping @ 21.6A, 1500W peak pulse, DO-214AB SMC surface mount, Automotive, -50°C to 150°C junction.","salesMarkdown":"## What the clamping spec means for the circuit The 1.5SMCJ43A-AQ: The reverse standoff of 43 V defines the working voltage the line sits at safely — transients below this level see near-infinite impedance from the TVS. When a surge fires, the 69.4 V clamping ceiling at 21.6 A peak pulse (10/1000 µs waveform) is what the downstream bus sees — the diode absorbs 1.5 kW of that energy and clamps the overvoltage before it reaches the load. Breakdown minimum of 47.8 V keeps the TVS invisible during normal operation; it transitions from blocking to conducting within a narrow window between standoff and clamping, which matters for response latency on fast transient events. ## Automotive deployment context Junction temperature rated to 150 °C — this covers the under-hood ambient band with margin for self-heating at full pulse load; the 21.6 A peak pulse rating is sized for the ISO 7637-2 pulse severity a 12 V system can generate. ## Sourcing posture — active production The part is listed Active by Diotec Semiconductor — quoted to order against BOM quantities through independent distribution, with current pricing and lead time confirmed at RFQ.","metaTitle":"1.5SMCJ43A-AQ TVS Diode, 43V Standoff, DO-214AB","metaDescription":"Diotec 1.5SMCJ43A-AQ unidirectional TVS diode, 43V standoff, 69.4V clamping, 1500W peak pulse, DO-214AB SMC surface mount. Automotive-grade. Quoted 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":"Automotive","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":"69.4V","Voltage - Reverse Standoff (Typ)":"43V","Current - Peak Pulse (10/1000µs)":"21.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9260","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ43A-AQ/alternatives.json"},"ai":{"faq":[{"question":"What is 1.5SMCJ43A-AQ used for?","answer":"It is a unidirectional TVS (transient voltage suppressor) Zener diode used to clamp voltage transients on automotive ECU inputs and other 12/24 V supply rails — protecting downstream ICs from surge events defined in ISO 7637-2."},{"question":"How does 1.5SMCJ43A-AQ fit against a standard SMC TVS in this voltage class?","answer":"The 43 V standoff / 69.4 V clamping / 1.5 kW peak pulse ratings place it squarely in the mid-range of the 1.5SMC series — the single unidirectional channel and DO-214AB package match the industry-standard pinout for drop-in replacement on existing boards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ43A-AQ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ43A-AQ 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}}