{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ40","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ40","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ40","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ40","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor 1.5SMCJ40 unidirectional Zener TVS diode, 40V standoff, 44.4V min breakdown, 71.4V clamping, 1.5 kW peak pulse, 21A, -50°C to +150°C junction, DO-214AB SMC surface mount.","salesMarkdown":"The 1.5SMCJ40: The 1.5 kW peak pulse rating at 10/1000 µs defines this as a mid-range TVS class — above the 500 W consumer-grade devices, below the 3 kW industrial types that push the SMC package thermally. Rated for unidirectional protection on a single channel: the cathode connects to the line to be protected, the anode grounds. Maximum clamping voltage is 71.4 V at the 21 A peak pulse current — the protected load sees no more than that during a surge event. ## Voltage window and junction temperature The 40 V standoff / 44.4 V breakdown / 71.4 V clamping sequence defines the protection window. A 24 V rail with typical transients sits comfortably below standoff — the TVS adds no load. A genuine surge that exceeds 44.4 V on the line activates the clamp and diverts current to ground. Operating junction temperature runs from -50°C to +150°C, so the part survives the thermal excursion of a large clamp event without derating issues in most enclosed panels. DO-214AB (SMC) is a surface-mount package — the cathode tab provides the thermal pad to the board. Follow the manufacturer's solder profile for the strip packaging orientation during reflow.","metaTitle":"1.5SMCJ40 Zener TVS Diode, 40V Standoff, 1.5 kW Peak Pulse","metaDescription":"Diotec 1.5SMCJ40 unidirectional Zener TVS diode, 40V standoff, 71.4V clamping, 1.5 kW peak pulse, 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":"71.4V","Voltage - Reverse Standoff (Typ)":"40V","Current - Peak Pulse (10/1000µs)":"21A"}},"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/1.5SMCJ40","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ40 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}}