{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ40E3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMBJ40E3-TR13","canonicalUrl":"https://icboms.com/microchip/SMBJ40E3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMBJ40E3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMBJ40E3/TR13, Zener TVS diode, 600W peak pulse power, unidirectional, 40V reverse standoff, 44.4V min breakdown, 71.4V clamp at 8.4A, DO-214AA SMB package, Tape & Reel, -65°C to 150°C.","salesMarkdown":"## What this TVS protects and where it sits The SMBJ40E3/TR13 is a 600 W peak-pulse Zener TVS diode from Microchip, rated for general-purpose circuit protection on a 40 V nominal rail. Its 44.4 V minimum breakdown voltage means it starts clamping before the protected bus hits 45 V, and the 71.4 V maximum clamp at 8.4 A sets the peak voltage the downstream silicon must survive. Surface-mount in DO-214AA (SMB) — the footprint is standard for 600 W TVS parts, so a layout swap with other SMB-packaged 40 V TVS diodes is a straight pad-for-pad replacement. ## Unidirectional clamp — one polarity only This is a single-direction TVS (one unidirectional channel). It protects against positive overvoltage transients referenced to ground; reverse-polarity events forward-bias the Zener junction and the part conducts like a diode. For AC-coupled signal lines or bidirectional bus protection (e.g., RS-485, CAN), you need a bidirectional variant such as the SMBJ40CA. Microchip lists the SMBJ40E3/TR13 as Active. That covers military avionics, downhole tools, and outdoor telecom cabinets without derating. The DO-214AA body is rated for standard reflow soldering; no special handling beyond MSL 1 (typical for this package class).","metaTitle":"SMBJ40E3/TR13 TVS Diode – 40V Standoff, 71.4V Clamp","metaDescription":"Microchip SMBJ40E3/TR13 Zener TVS, 600W peak pulse, unidirectional, 44.4V min breakdown, 71.4V clamp at 8.4A. Active production, DO-214AA SMB, -65°C to 150°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Microchip Technology","Type":"Zener","Series":"-","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"600W","Base Product Number":"SMBJ40","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMBJ (DO-214AA)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"44.4V","Voltage - Clamping (Max) @ Ipp":"71.4V","Voltage - Reverse Standoff (Typ)":"40V","Current - Peak Pulse (10/1000µs)":"8.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2850","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f566c62ad8bf6be9ecf452f6999d0b7a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SMBJ40E3/TR13 unidirectional or bidirectional?","answer":"Unidirectional — one channel. It clamps positive transients to ground. For bidirectional protection, use a part such as the SMBJ40CA."},{"question":"What is the closest pin-compatible alternative to SMBJ40E3/TR13?","answer":"The SMBJ40CA (bidirectional) shares the same DO-214AA footprint and 40 V standoff rating. For a unidirectional alternative from another brand, any 600 W, 40 V TVS in SMB package — e.g., Littelfuse SMBJ40A — is a direct footprint match. Confirm the breakdown and clamp voltage tolerances against your rail before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMBJ40E3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMBJ40E3-TR13 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}}