{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ4731CE3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ4731CE3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ4731CE3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ4731CE3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology Zener Diode, SMAJ4731CE3/TR13, 4.3 V, 2 W, ±2% Tolerance, DO-214AC SMA, Tape & Reel.","salesMarkdown":"## Zener regulation at 4.3 V, 2 W DO-214AC The SMAJ4731CE3/TR13 is a 4.3 V Zener diode from Microchip Technology, rated for 2 W continuous power dissipation in the DO-214AC (SMA) surface-mount package. The ±2% tolerance on the nominal voltage means the actual breakdown sits between 4.214 V and 4.386 V at the test current — tight enough for a reference rail in a low-precision regulator or a clamp threshold where the guard band matters more than the absolute value. Maximum impedance (Zzt) is 9 Ohms at the zener test current, so the regulation slope is shallow — a 10 mA change in bias current shifts the output voltage by about 90 mV. Reverse leakage is specified at 10 µA maximum with 1 V reverse bias, which is the leakage floor before the junction enters breakdown. ## DO-214AC footprint and assembly The DO-214AC (SMA) package is a standard JEDEC outline with a 2.6 mm body width and gull-wing leads. The tape-and-reel format (TR suffix) feeds into a pick-and-place machine without a reel change — the carrier tape pitch is 4 mm per JEDEC 8 mm tape width. The cathode band on the body matches the polarity mark on the PCB silkscreen; a reversed diode blocks instead of regulating. The junction-to-ambient thermal resistance for the SMA body on a standard FR-4 pad is roughly 90°C/W — at 2 W dissipation the junction sits 180°C above ambient, so the 150°C limit derates the part to about 1.4 W at 85°C ambient. Microchip lists this part as Active. The base product number SMAJ473 covers the family; the CE3 suffix indicates the ±2% tolerance grade and the /TR13 denotes the tape-and-reel packaging. Sourced through independent distribution channels.","metaTitle":"Microchip SMAJ4731CE3/TR13 Zener Diode, 4.3 V, 2 W, DO-214AC","metaDescription":"Microchip SMAJ4731CE3/TR13 Zener diode, 4.3 V nominal, 2 W, ±2% tolerance, DO-214AC SMA package. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±2%","Power - Max":"2 W","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"SMAJ473","Impedance (Max) (Zzt)":"9 Ohms","Operating Temperature":"-55°C~150°C","Supplier Device Package":"DO-214AC","Voltage - Zener (Nom) (Vz)":"4.3 V","Current - Reverse Leakage @ Vr":"10 µA @ 1 V","Voltage - Forward (Vf) (Max) @ If":"1.2 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6150","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ebad8f820d8ea0d9e07e6ed7b505adea.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What compliance documentation does Microchip provide for SMAJ4731CE3/TR13?","answer":"Microchip Technology provides RoHS and REACH compliance documentation for this part. The DO-214AC package is lead-free and the part is listed as RoHS-compliant per standard Microchip material declarations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ4731CE3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ4731CE3-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}}