{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ40A-13","brand":"Diodes Incorporated","brandSlug":"diodes-inc","productSlug":"SMAJ40A-13","canonicalUrl":"https://icboms.com/diodes-inc/SMAJ40A-13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ40A-13","rawCanonicalId":null},"summary":{"shortDescription":"Diodes Incorporated SMAJ40A-13 Zener TVS diode, 400W peak pulse power, 40V reverse standoff, 64.5V clamping, 6.2A peak pulse current, DO-214AC SMA package, Tape & Reel.","salesMarkdown":"## 400W Zener TVS in a DO-214AC footprint The SMAJ40A-13: It clamps transients at 64.5V max, with a 40V reverse standoff voltage and a 44.4V minimum breakdown threshold — sized for 40V nominal rails that see occasional surge events. Housed in the DO-214AC (SMA) surface-mount package, it fits standard pick-and-place reflow assembly. The SMA footprint is a common TVS package across the 400W class, so board layouts for this part often accept alternative suppliers without a spin. For a 40V rail, a 64.5V clamp leaves ~24V of headroom below typical 80V-rated downstream components — a reasonable margin for most industrial and telecom DC buses. Peak pulse power is specified at 400W for a 10/1000µs exponential waveform. That test pulse shape is the industry standard for TVS diode rating — it correlates to the energy in a lightning-induced surge or inductive load dump. Real-world pulse widths shorter than 1000µs allow the device to absorb higher peak power. The junction temperature derating curve (not shown here) typically reduces peak pulse power above 25°C, so a hot enclosure near 85°C ambient cuts the effective surge capacity roughly in half. ## Active production — no last-time-buy pressure This is a single-channel unidirectional device — it protects one signal or power rail. For bidirectional or multi-channel applications, a different order code from the SMAJ family would apply.","metaTitle":"SMAJ40A-13 TVS Diode, 400W, 40V Standoff, DO-214AC","metaDescription":"Diodes Incorporated SMAJ40A-13 Zener TVS diode, 400W peak pulse, 40V reverse standoff, 6.2A peak current. Active production, DO-214AC SMA package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diodes Incorporated","Type":"Zener","Series":"-","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","lifecycle_stage":"eol_hot","Power - Peak Pulse":"400W","Base Product Number":"SMAJ40","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMA","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"44.4V","Voltage - Clamping (Max) @ Ipp":"64.5V","Voltage - Reverse Standoff (Typ)":"40V","Current - Peak Pulse (10/1000µs)":"6.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a6e414533ed6f0f7c15ae6d19d66ae3c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does the SMAJ40A-13 come in?","answer":"The SMA footprint is widely used across the 400W TVS class."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diodes-inc/SMAJ40A-13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diodes-inc/SMAJ40A-13 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}}