{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ28E3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ28E3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ28E3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ28E3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMAJ28E3/TR13, Zener TVS diode, 28V reverse standoff, 500W peak pulse power, unidirectional, DO-214AC (SMA) surface mount, Tape & Reel, active","salesMarkdown":"## What this TVS diode protects and how it clamps The SMAJ28E3/TR13 is a unidirectional Zener TVS diode in the DO-214AC (SMA) package, rated for 500W peak pulse power per the 10/1000µs waveform. Its 28V reverse standoff voltage means the protected rail can run at 28V DC nominal without the diode conducting leakage; clamping begins when the voltage exceeds the 31.1V minimum breakdown threshold, and the clamp voltage is held to 50V maximum at the rated 9.9A peak pulse current. ## Package and footprint reality for the board The DO-214AC (SMA) package is a two-pad surface-mount footprint shared across the SMAJ family. The cathode band on the body marks the unidirectional orientation — the anode pad connects to ground, the cathode to the protected rail. Tape & Reel (TR) packaging suits automated pick-and-place for volume assembly. Sourcing is per RFQ — we confirm availability and current pricing against your BOM quantity at quote time.","metaTitle":"SMAJ28E3/TR13 TVS Zener Diode 28V 500W DO-214AC Microchip","metaDescription":"SMAJ28E3/TR13 Zener TVS diode, 28V reverse standoff, 500W peak pulse power, DO-214AC SMA, unidirectional, active production.","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":"SMAJ28","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AC (SMA)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"31.1V","Voltage - Clamping (Max) @ Ipp":"50V","Voltage - Reverse Standoff (Typ)":"28V","Current - Peak Pulse (10/1000µs)":"9.9A"}},"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":"What is the peak pulse power of SMAJ28E3/TR13?","answer":"500W peak pulse power, measured with a 10/1000µs waveform per the TVS test standard. That rating applies to a single non-repetitive surge; repetitive pulsing requires derating based on the pulse repetition rate and ambient temperature."},{"question":"Is SMAJ28E3/TR13 unidirectional or bidirectional?","answer":"Unidirectional, with one Zener channel. The cathode band on the DO-214AC body marks the polarity — the cathode connects to the protected rail, the anode to ground."},{"question":"What is the difference between SMAJ28E3/TR13 and SMAJ28A?","answer":"Both are 28V TVS diodes in the same SMAJ family and DO-214AC package. The SMAJ28A is a bidirectional device (two Zener channels back-to-back), while the SMAJ28E3/TR13 is unidirectional. The suffix on the Microchip part indicates lead-free / RoHS-compliant finish. For a unidirectional clamp on a 28V rail, the SMAJ28E3/TR13 is the correct choice; for AC or bipolar signal lines, the SMAJ28A would be appropriate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ28E3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ28E3-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}}