{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4729AUR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4729AUR","canonicalUrl":"https://icboms.com/microchip/1N4729AUR","factsUrl":"https://icboms.com/api/mcp/products/1N4729AUR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology Zener diode, 1N4729AUR, 3.6 V nominal, ±5% tolerance, 1 W power, DO-213AB MELF surface mount, -65°C to 175°C.","salesMarkdown":"## Zener voltage and power rating The 1N4729AUR is a 3.6 V Zener diode in a DO-213AB MELF package, rated for 1 W continuous power dissipation. Maximum impedance (Zzt) is 10 Ohms at the Zener test current, so the regulation slope is moderate — the output voltage shifts about 10 mV per mA of load change. For a simple shunt regulator feeding a low-power microcontroller or a comparator reference, this is workable; for a precision ADC reference, a lower-impedance Zener or a bandgap device would be tighter. Reverse leakage is specified at 100 µA maximum at 1 V reverse bias, which is well below the Zener knee — the diode stays high-impedance until the breakdown region. Forward voltage is 1.2 V max at 200 mA, typical for a silicon junction at this current density. ## Package and temperature range The DO-213AB MELF (metal electrode leadless face) package is a cylindrical, end-capped surface-mount body. It places flat on the pad with no lead coplanarity issues — the solder wets the full end-cap circumference. The package footprint is standard; the MELF's round profile can tombstone during reflow if the pad geometry is asymmetric, so keep the pad lengths equal on both ends. The 175°C junction limit is the same as many power diodes — derate power above 25°C per the thermal resistance curve (not in this listing, but standard for the package). ## Active production and sourcing Microchip Technology lists the 1N4729AUR as Active.","metaTitle":"Microchip 1N4729AUR Zener Diode, 3.6 V, 1 W, DO-213AB MELF","metaDescription":"Microchip Technology 1N4729AUR Zener diode, 3.6 V nominal, ±5% tolerance, 1 W power dissipation, DO-213AB MELF package, active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Series":"-","Package":"Bulk","Tolerance":"±5%","Power - Max":"1 W","Mounting Type":"Surface Mount","Package / Case":"DO-213AB, MELF","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"1N4729","Impedance (Max) (Zzt)":"10 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"DO-213AB","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":"$3.3300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc4f081abf264e3fbd0ed0846e93ec3c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N4729AUR/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4729AUR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4729AUR 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}}