{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ12A","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ12A","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ12A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ12A","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor Zener TVS diode, 1.5SMCJ12A, 12V reverse standoff, 13.3V min breakdown, 19.9V clamping, 1500W peak pulse, 75.4A peak pulse current, DO-214AB SMC surface mount.","salesMarkdown":"## TVS diode selection — what the 1.5SMCJ12A ratings mean The 1.5SMCJ12A is a unidirectional Zener-type TVS diode — it clamps transients in one direction only, which means it sits across a signal line or power rail where the protected node never sees reverse polarity beyond the standoff rating. 12 V reverse standoff is the working voltage the diode presents to the circuit when idle — the part is off and drawing only leakage current until the transient pushes the node above breakdown. 13.3 V minimum breakdown marks the onset of conduction — the clamping action starts here, and the diode conducts the surge current away from the protected node. 1.5 kW peak pulse rating means the diode survives the thermal spike of a single 10/1000 µs event at rated current without leaving the SOA — the clamping voltage of 19.9 V at 75.4 A multiplies to roughly 1.5 MW peak, but the 1.5 kW rating is the normalized 10/1000 µs test condition from which the spec is derived. ## DO-214AB package — surface-mount footprint for board integration The DO-214AB (SMC) package is the standard surface-mount outline for 1.5–3 kW TVS diodes — the cathode bar spans the full package width and must sit on a copper pad sized for the transient thermal impedance, not just for mechanical retention. The supplier device package field lists SMC/DO-214AB — confirm the land pattern matches IPC-7351B medium density, and budget a minimum 3 mm creepage clearance between the cathode and anode pads if the board coating is not applied. ## Where a unidirectional TVS fits — and where it does not This part is classified for general-purpose applications and explicitly carries no power-line protection rating — it is not the right fit for AC mains clamping or 220 V bus protection, but it is well-suited for protecting downstream IC inputs, communication bus lines, and low-voltage DC rails against ESD and surge transients. The unidirectional polarity means it does not protect against reverse-polarity overvoltage on the rail it is guarding — a bidirectional TVS (dual-polarity variant) is needed if the protected node sees both polarities in normal operation.","metaTitle":"Diotec 1.5SMCJ12A TVS Diode, 12V standoff, DO-214AB","metaDescription":"1.5SMCJ12A unidirectional TVS diode, 12V standoff / 13.3V breakdown / 19.9V clamping, 1500W peak pulse, DO-214AB SMC. Active production — 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":"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)":"13.3V","Voltage - Clamping (Max) @ Ipp":"19.9V","Voltage - Reverse Standoff (Typ)":"12V","Current - Peak Pulse (10/1000µs)":"75.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMCJ12A/alternatives.json"},"ai":{"faq":[{"question":"Is 1.5SMCJ12A available via RFQ confirmation and what is the lead time?","answer":"Availability and lead time are confirmed against your BOM quantity at quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ12A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ12A 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}}