{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMCJ40CA-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMCJ40CA-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMCJ40CA-TR","factsUrl":"https://icboms.com/api/mcp/products/SMCJ40CA-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMCJ, TRANSIL™ series, SMCJ40CA-TR, bidirectional Zener TVS diode, 1500W peak pulse power, 40V reverse standoff, 84V clamping, DO-214AB SMC package, surface mount, -55°C to 150°C.","salesMarkdown":"## 1500W peak pulse power — sizing the transient clamp That 1500W rating defines the energy it can absorb from a surge without failing — the design decision is whether the transient energy on your 40V rail stays under that ceiling. The 40V reverse standoff voltage matches the nominal DC rail voltage; the diode remains transparent below that level and only clamps when the line exceeds the breakdown threshold. ## Clamping voltage and peak current — what the protected circuit sees That 84V is the voltage the downstream components must survive — if your 40V bus feeds a converter rated for 60V absolute max, this part leaves no headroom. The breakdown voltage range starts at 44.4V minimum, so the diode begins conducting before the rail reaches damaging levels. The single bidirectional channel handles both positive and negative transients, which simplifies layout for AC-coupled or floating lines. For production BOMs, this means no near-term supply discontinuity. ## Package and temperature range — board-level fit","metaTitle":"STMicroelectronics SMCJ40CA-TR TVS Diode, 1500W","metaDescription":"STMicroelectronics SMCJ40CA-TR bidirectional Zener TVS diode, 1500W peak pulse power, 40V reverse standoff, 84V clamping.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMCJ, TRANSIL™","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"SMCJ40","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"44.4V","Voltage - Clamping (Max) @ Ipp":"84V","Voltage - Reverse Standoff (Typ)":"40V","Current - Peak Pulse (10/1000µs)":"119A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/afa32e66ad58d9d3b67a92acb79ea14b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMCJ40CA-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMCJ40CA-TR suitable for protecting a 24V system?","answer":"Yes, the 40V reverse standoff voltage is well above a 24V nominal rail, so the diode will not conduct during normal operation. The 44.4V minimum breakdown provides margin before clamping begins, and the 84V clamping keeps the transient voltage within the typical 100V rating of downstream 24V-rated components."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMCJ40CA-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMCJ40CA-TR 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}}