{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ4729AE3/TR13","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"SMAJ4729AE3-TR13","canonicalUrl":"https://icboms.com/microchip/SMAJ4729AE3-TR13","factsUrl":"https://icboms.com/api/mcp/products/SMAJ4729AE3%2FTR13","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology SMAJ4729AE3/TR13 Zener Diode, 3.6 V, 2 W, ±5% Tolerance, DO-214AC SMA Package, Tape & Reel.","salesMarkdown":"## 3.6 V regulation point and what it means on the bench The SMAJ4729AE3/TR13 is a 3.6 V Zener diode in the standard DO-214AC (SMA) surface-mount package, rated for 2 W continuous power dissipation. That 3.6 V nominal is the knee voltage where it starts conducting in reverse breakdown — below that it blocks like a normal diode, above it clamps the rail to roughly 3.6 V plus the tolerance band. The 10 Ohm max impedance (Zzt) at the test current tells you how much the regulation voltage shifts with load current — lower impedance means tighter regulation. For a 3.6 V rail feeding a low-power MCU or a bias reference, that impedance is the number that governs how clean the rail stays under varying draw. ## Temperature range and leakage — the reliability read That 150°C ceiling means it survives under-hood automotive ambient or a cramped power supply without derating the power dissipation — but the 2 W max is at 25°C lead temperature; derate above that per the datasheet curve. Reverse leakage is specified at 100 µA max at 1 V reverse bias. In a battery-powered circuit where the Zener sits across a rail that is normally below breakdown, that leakage current is the standby draw the diode adds. At 3.6 V the leakage will be lower than the 1 V test point, but the spec gives you a worst-case floor for your quiescent budget. ## Forward drop and package — board-fit details Maximum forward voltage is 1.2 V at 200 mA forward current — this matters if the diode is ever forward-biased in the circuit (e.g., reverse-polarity protection). The DO-214AC footprint is standard: the cathode is marked by a band on the body, and the solder pad pattern matches the JEDEC outline for SMA diodes. Supplied in Tape & Reel (TR), which is the standard carrier for automated pick-and-place assembly. The reel quantity is set by the manufacturer; the package itself is reflow-compatible with standard lead-free profiles. ## Active lifecycle — no obsolescence watch needed Microchip lists this part as Active in production. No end-of-life notice, no last-time-buy window, no successor to track.","metaTitle":"Microchip SMAJ4729AE3/TR13 Zener Diode, 3.6 V, 2 W, DO-214AC","metaDescription":"Microchip SMAJ4729AE3/TR13 Zener diode, 3.6 V nominal, 2 W, ±5% tolerance, DO-214AC SMA package. Active production, sourced to order. Request a quote.","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":"SMAJ472","Impedance (Max) (Zzt)":"10 Ohms","Operating Temperature":"-55°C~150°C","Supplier Device Package":"DO-214AC","Voltage - Zener (Nom) (Vz)":"3.6 V","Current - Reverse Leakage @ Vr":"100 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":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/SMAJ4729AE3-TR13","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/SMAJ4729AE3-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}}