{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMBJ40A","brand":"Bourns Inc.","brandSlug":"bourns-inc","productSlug":"1.5SMBJ40A","canonicalUrl":"https://icboms.com/bourns-inc/1.5SMBJ40A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMBJ40A","rawCanonicalId":null},"summary":{"shortDescription":"Bourns Inc. 1.5SMBJ Automotive series Zener TVS diode, 1.5SMBJ40A, 40V reverse standoff, 64.5V clamp, 1500W peak pulse, DO-214AA (SMB), AEC-Q101, Tape & Reel.","salesMarkdown":"## Automotive-grade transient suppression — what the ratings mean for the BOM The 1.5SMBJ40A is a 1500W peak-pulse-power Zener TVS diode from Bourns' Automotive 1.5SMBJ series, qualified to AEC-Q101 — the automotive IC stress and reliability standard. The 40V reverse standoff voltage is the DC rail it protects — a 24V or 36V bus with transients up to 64.5V clamp stays within the downstream IC's abs-max rating. The 23.3A peak pulse current at the 10/1000µs waveform is the surge it can shunt without failing; that waveform is the industry-standard telecom surge, so the rating is directly comparable across TVS datasheets. ## Package and board-fit — DO-214AA (SMB) footprint The DO-214AA (SMB) package is a standard surface-mount footprint shared across many TVS diodes and Schottky rectifiers. The copper pad area under the cathode tab sets the thermal resistance — a 1 oz copper pour of at least 25 mm² per tab keeps the junction temperature rise within the 150°C limit during repetitive surges. Supplied on Tape & Reel, the part is compatible with standard pick-and-place and reflow profiles. The 1500W rating is derated above 25°C per the datasheet curve — at 125°C ambient the peak pulse power drops to roughly 60% of the 25°C value, so a 1500W-rated part at high temperature still delivers ~900W, which covers most automotive load-dump and inductive-kick transients. ## Sourcing posture — active, qualified, single-source The part is single-sourced from Bourns, so the procurement hedge is to confirm lead time at RFQ and maintain a safety stock if the build rate is high.","metaTitle":"Bourns 1.5SMBJ40A TVS Diode, 1500W, AEC-Q101, DO-214AA","metaDescription":"Bourns 1.5SMBJ40A Zener TVS, 40V standoff, 64.5V clamp, 1500W peak pulse, AEC-Q101 qualified. Active production — sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Bourns Inc.","Type":"Zener","Series":"Automotive, AEC-Q101, 1.5SMBJ","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMBJ","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMB (DO-214AA)","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":"$0.2565","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ee1fb175d38950cd5a23672129674f6e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5SMBJ40A?","answer":"The part is single-sourced from Bourns."},{"question":"What compliance documentation does Bourns provide for 1.5SMBJ40A?","answer":"Bourns provides RoHS and REACH compliance documentation for the 1.5SMBJ series. The AEC-Q101 qualification is the automotive-grade certification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/bourns-inc/1.5SMBJ40A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/bourns-inc/1.5SMBJ40A 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}}