{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4728AUR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4728AUR","canonicalUrl":"https://icboms.com/microchip/1N4728AUR","factsUrl":"https://icboms.com/api/mcp/products/1N4728AUR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4728AUR Zener diode, 3.3 V nominal, ±5% tolerance, 1 W power dissipation, DO-213AB MELF package, surface mount.","salesMarkdown":"## 3.3 V zener, 1 W in a MELF The 1N4728AUR is a 3.3 V zener diode rated for 1 W continuous power dissipation in the DO-213AB MELF package — a common voltage reference or clamping element for low-voltage rails in industrial and telecom designs. With ±5% tolerance on the nominal voltage, the actual zener voltage falls between 3.135 V and 3.465 V, which is tight enough for basic regulation or protection circuits where a precision reference is not required. ## Thermal and leakage profile Reverse leakage is specified at 100 µA max at 1 V reverse bias — well below the zener knee, so the diode draws negligible current until the applied voltage approaches 3.3 V. Maximum forward voltage is 1.2 V at 200 mA, typical for a silicon junction; the diode can be used as a standard rectifier in a pinch, though the 1 W dissipation limit still applies.","metaTitle":"Microchip 1N4728AUR Zener Diode, 3.3 V, 1 W, DO-213AB","metaDescription":"1N4728AUR from Microchip Technology: Zener diode, 3.3 V nominal, ±5% tolerance, 1 W power dissipation, DO-213AB MELF package.","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":"1N4728","Impedance (Max) (Zzt)":"10 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"DO-213AB","Voltage - Zener (Nom) (Vz)":"3.3 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/1N4728AUR/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4728AUR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4728AUR 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}}