{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMCJ45A","brand":"Diotec Semiconductor","brandSlug":"diotec-semiconductor","productSlug":"1.5SMCJ45A","canonicalUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ45A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMCJ45A","rawCanonicalId":null},"summary":{"shortDescription":"Diotec Semiconductor unidirectional TVS diode, 1.5SMCJ45A, 45V standoff, 72.7V clamping @ 20.6A, 1.5kW peak pulse, DO-214AB SMC, surface mount, -50°C to 150°C TJ.","salesMarkdown":"## What the 45V standoff rating means for your rail The 1.5SMCJ45A: The 45V reverse standoff (typ) is the maximum voltage the TVS sees in normal circuit operation — the downstream IC or rail being protected must sit below this at all times, including at the top of its tolerance band. When a surge exceeds the 50V minimum breakdown threshold, the device transitions to conduction and clamps the voltage at 72.7V maximum regardless of how high the incident surge current climbs — up to the 20.6A peak pulse rating. A faster 8/20 µs surge (first-stroke lightning) delivers the same energy in less time, so the clamping level at a given current can be lower — but the part's survival hinges on not exceeding the 20.6 A Ipp ceiling at the stated 10/1000 µs shape. The unidirectional topology means it clamps only one polarity — for AC rails or bidirectional protection you need a separate TVS or a bidirectional device. The power-line-protection flag confirms this is a board-level transient suppressor, not a mains-side protector. ## DO-214AB SMC footprint and thermal margins The SMC (DO-214AB) package is the mid-size surface-mount TVS footprint — larger than the SMA (DO-214AC) and smaller than the SMB — which places it between the SMB's higher peak-pulse rating and the SMA's lower cost. Pad layout follows the standard SMC land pattern; the cathode bar marks polarity on the reel. Junction temperature is rated -50°C to 150°C. At the upper end, clamping voltage increases and peak-pulse capability decreases per the temperature-derating curve — for a TVS protecting a 24V rail in a confined enclosure, confirm the worst-case ambient plus self-heating keeps the TJ below 150°C under the longest expected surge. ## Sourcing — active production from Diotec Available to order through independent distribution; pricing and lead time confirmed at RFQ.","metaTitle":"Diotec 1.5SMCJ45A TVS Diode, 45V Standoff, DO-214AB","metaDescription":"Diotec 1.5SMCJ45A unidirectional TVS diode, 45V standoff, 72.7V clamping at 20.6A, 1.5kW peak pulse, DO-214AB SMC. Active production. Available 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)":"50V","Voltage - Clamping (Max) @ Ipp":"72.7V","Voltage - Reverse Standoff (Typ)":"45V","Current - Peak Pulse (10/1000µs)":"20.6A"}},"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":"How do I order 1.5SMCJ45A or check current stock?","answer":"Submit an RFQ and the sourcing desk will confirm real-time pricing and lead time from available channels. No stock count is published on this listing — availability is quoted against the specific order quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diotec-semiconductor/1.5SMCJ45A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diotec-semiconductor/1.5SMCJ45A 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}}