{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ40A","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ40A","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ40A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ40A","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor Zener TVS diode, 1.5SMCJ40A, 40V reverse standoff, 64.5V clamping, 23.3A peak pulse, 1.5kW peak power, -50°C to 150°C junction, DO-214AB SMC surface mount.","salesMarkdown":"## Standoff, clamping, and surge handling The 1.5SMCJ40A is a unidirectional TVS diode — a Zener-based clamp that diverts surge current away from a protected load when the line voltage exceeds the standoff threshold. ## Thermal margin in the clamp path For a board running in a sealed enclosure at 85°C ambient, the available thermal delta to the 150°C max is 65°C, which constrains how long and how often the diode can absorb repetitive surges before derating is required. ## DO-214AB SMC — what the package means for the layout The SMC (DO-214AB) package is the mid-size TVS footprint — larger than the SMA (DO-214AC) and smaller than the SMCG — with a typical land pattern of 3.3 mm body width and 1.5 mm standoff height above the board. The strip packaging designation means it ships cut-tape or reel depending on the order quantity; confirm the exact reel option at order time since the two have different tape widths and the pick-and-place feeder requirements differ.","metaTitle":"1.5SMCJ40A TVS Diode, 40V Standoff, 1.5kW Peak","metaDescription":"Diotec 1.5SMCJ40A unidirectional TVS diode, 40V standoff, 64.5V clamping, 1.5 kW peak pulse at 10/1000 µs. DO-214AB SMC surface mount.","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)":"44.4V","Voltage - Clamping (Max) @ Ipp":"64.5V","Voltage - Reverse Standoff (Typ)":"40V","Current - Peak Pulse (10/1000µs)":"23.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9158","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3fb0502b23c3703cafef426b7b2bf7e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What standoff voltage class is the 1.5SMCJ40A, and what does it protect?","answer":"The 40 V reverse standoff voltage puts this in the class suited for 24 V industrial control buses, CAN/LIN node protection, and general-purpose overvoltage clamping on supply rails that see transients above the nominal operating voltage. The unidirectional configuration means it clamps positive surges only — it does not provide bidirectional bipolar protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ40A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ40A 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}}