{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ18A-AQ","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ18A-AQ","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ18A-AQ","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ18A-AQ","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor Zener TVS diode, 1.5SMCJ18A-AQ, 1500W peak pulse, 18V reverse standoff, 29.2V clamping @ 51.4A, DO-214AB SMC surface-mount, automotive.","salesMarkdown":"## What the 18V standoff and 29.2V clamping rating mean for your circuit The 1.5SMCJ18A-AQ clamps the line at 29.2V maximum when a 51.4A surge (10/1000 µs waveform) strikes — any downstream semiconductor seeing a rail spike must survive 29.2V at its pins before the TVS commits. The 18V reverse standoff is the working voltage the diode blocks in normal operation; the 20V breakdown minimum marks where it starts conducting during a transient event. For a 12V automotive rail, 18V standoff gives comfortable headroom above the nominal battery voltage, and the clamping ceiling stays below what a typical MOSFET gate or ECU input can tolerate. ## Automotive temperature grade and what the 1500W rating means Using it as a continuous clamp across a power rail would exceed its thermal limits. ## DO-214AB SMC package — what the footprint means for the layout Surface-mount SMC (DO-214AB) package — the cathode bar is the thermally active side and must connect to a copper pad sized for the transient thermal impedance. On a two-layer board the pad under the cathode tab carries the heat away; on a four-layer board the thermal vias under the pad drop junction-to-ambient resistance significantly. The unidirectional single-channel topology means the cathode faces the protected line and the anode ties to ground — orientation matters, and the SMC package has no polarity-ambiguity markings beyond the bar.","metaTitle":"Diotec 1.5SMCJ18A-AQ TVS Diode, 18V standoff, 29.2V clamp","metaDescription":"1.5SMCJ18A-AQ is an automotive Zener TVS diode, 1500W peak pulse, 18V standoff, 29.2V clamping. Active production — quoted to order via RFQ.","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)":"20V","Voltage - Clamping (Max) @ Ipp":"29.2V","Voltage - Reverse Standoff (Typ)":"18V","Current - Peak Pulse (10/1000µs)":"51.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9260","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the 1.5SMCJ18A-AQ's listed type?","answer":"The part is classified as a Zener-type transient voltage suppressor in the Circuit Protection category. It is unidirectional — it clamps positive transients in one polarity and does not protect AC or bidirectional signal lines."},{"question":"What compliance documentation does Diotec provide for the 1.5SMCJ18A-AQ?","answer":"The AEC-Q suffix signals automotive qualification scope — the specific test reports, REACH/RoHS declarations, and PPAP level are issued by Diotec Semiconductor directly and confirmed at order entry. Request the compliance package through the RFQ channel when quoting BOM volume."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ18A-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/1.5SMCJ18A-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}}