{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ51CE3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ51CE3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ51CE3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ51CE3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMAJ51CE3/TR13, Zener TVS diode, 51 V reverse standoff, 500 W peak pulse power, DO-214AC (SMA) surface mount package, Tape & Reel (TR).","salesMarkdown":"Its 56.7 V minimum breakdown voltage and 91.1 V clamping point mean it triggers before the downstream silicon sees damaging overvoltage, but still leaves enough headroom for normal rail ripple. The 500 W peak pulse rating (10/1000 µs waveform) is the energy it can absorb in a single surge event — useful for protecting 48 V telecom supplies, industrial 48 VDC buses, or automotive 24 V systems where the alternator load-dump transient can spike well above the steady-state rail. The reverse standoff voltage is 51 V — this is the DC bias the diode sees in normal operation without conducting. Below that, leakage is negligible. The breakdown voltage range starts at 56.7 V; this is where the diode begins to avalanche. If your rail is a tightly regulated 48 V, the margin is comfortable. But if the rail is a 52 V nominal with 5 % tolerance, the worst-case steady-state voltage could sit at 54.6 V, which is only 2.1 V below the breakdown knee — thermal runaway risk goes up. The clamping voltage at the peak pulse current (5.5 A) is 91.1 V, so any spike that exceeds that gets clipped. For a 48 V supply with a 100 V-rated downstream MOSFET, this clamp keeps the drain-source voltage within safe limits. ## Package and temperature range for the environment Housed in a DO-214AC (SMA) surface-mount package, the SMAJ51CE3/TR13 is a standard footprint that reflows on a typical lead-free profile. Microchip lists this part as Active. That means the BOM line is stable for new designs and production runs — no last-time-buy scramble. The base product number is SMAJ51, so if you need a different voltage variant in the same package, the SMAJ family covers that range.","metaTitle":"SMAJ51CE3/TR13 Zener TVS Diode – 51 V, 500 W, DO-214AC","metaDescription":"SMAJ51CE3/TR13 Zener TVS diode, 51 V reverse standoff, 500 W peak pulse, DO-214AC (SMA) surface mount. Active production. Sourced per RFQ.","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-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"500W","Base Product Number":"SMAJ51","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AC (SMA)","Voltage - Breakdown (Min)":"56.7V","Voltage - Clamping (Max) @ Ipp":"91.1V","Voltage - Reverse Standoff (Typ)":"51V","Current - Peak Pulse (10/1000µs)":"5.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7b3ddece4863b4621debe180df56adc8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SMAJ51CE3/TR13 bidirectional?","answer":"Yes, it has one bidirectional channel. It clamps both positive and negative transients symmetrically, which is typical for Zener TVS diodes in AC or floating DC applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ51CE3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ51CE3-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}}