{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ4732AE3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ4732AE3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ4732AE3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ4732AE3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMAJ4732AE3/TR13 Zener Diode, 4.7 V nominal, ±5% tolerance, 2 W power dissipation, DO-214AC (SMA) surface-mount package, Tape & Reel.","salesMarkdown":"## 4.7 V Zener — the regulation point and what it drives The SMAJ4732AE3/TR13 is a 4.7 V Zener diode in Microchip's SMAJ47xx family, rated for 2 W continuous power dissipation in the DO-214AC (SMA) surface-mount package. The 4.7 V nominal voltage with ±5% tolerance means the regulation window spans 4.465 V to 4.935 V — tight enough to clamp a 5 V rail or serve as a voltage reference in a bias supply. Maximum impedance (Zzt) is 8 Ohms at the test current. For a load drawing 50 mA, the voltage drop across the Zzt adds 0.4 V to the regulation error — this is the number to plug into the line-and-load regulation budget when the diode is used as a shunt reference. The 2 W power rating derates above 25°C ambient — at 85°C the allowable dissipation drops to roughly 1.2 W, so the load current must stay below 255 mA at the Zener voltage to stay inside the thermal envelope. ## DO-214AC footprint and assembly fit The DO-214AC (SMA) package is a standard JEDEC outline for 2 W Zener diodes. The cathode band identifies the marked terminal; the anode is the opposite end. Reflow profile follows J-STD-020 for MSL 1 parts — no bake required before assembly if the moisture barrier bag is intact. Supplied on Tape & Reel (TR), the SMAJ4732AE3/TR13 is ready for automated pick-and-place. The 8 mm tape width and 4 mm pitch are standard for SMA diodes, so no feeder changeover is needed if your line already runs DO-214AC parts.","metaTitle":"Microchip SMAJ4732AE3/TR13 Zener Diode, 4.7 V, 2 W","metaDescription":"Active production Zener diode, 4.7 V nominal, ±5% tolerance, 2 W max power, DO-214AC SMA package, -55°C to 150°C range. Quoted to order against RFQ.","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":"±5%","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)":"8 Ohms","Operating Temperature":"-55°C~150°C","Supplier Device Package":"DO-214AC","Voltage - Zener (Nom) (Vz)":"4.7 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 is SMAJ4732AE3/TR13's reverse leakage specification?","answer":"Maximum reverse leakage is 10 µA at 1 V reverse voltage, measured at 25°C. Leakage doubles approximately every 10°C rise above 25°C — at 85°C ambient the leakage may reach 160 µA, which matters for high-impedance bias circuits where the Zener is the only load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ4732AE3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ4732AE3-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}}