{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N4733AUR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N4733AUR","canonicalUrl":"https://icboms.com/microchip/1N4733AUR","factsUrl":"https://icboms.com/api/mcp/products/1N4733AUR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N4733AUR zener diode, 5.1 V nominal, ±5% tolerance, 1 W power dissipation, DO-213AB MELF surface-mount package, -65°C to 175°C operating range.","salesMarkdown":"## 5.1 V regulation in a hermetic MELF The 1N4733AUR is a 5.1 V zener diode in a DO-213AB MELF package, rated for 1 W continuous power dissipation. The ±5% tolerance on the nominal voltage means the actual zener voltage falls between 4.845 V and 5.355 V at the test current — tight enough for most 5 V rail clamping or reference applications without bin-sorting. The DO-213AB MELF package is a hermetic glass body with metallized end caps — it handles thermal cycling and moisture better than plastic SMD packages. Maximum zener impedance (Zzt) is 7 Ohms at the test current. This impedance sets the voltage regulation accuracy under varying current: a 10 mA change in zener current shifts the output voltage by up to 70 mV. For a precision 5 V reference, the bias current must stay stable — a current source or high-value resistor feeding the zener keeps the operating point on the flat part of the I-V curve. Reverse leakage current is 10 µA maximum at 1 V reverse voltage — that is well below the zener knee, so this spec matters for circuits where the zener sits across a signal line and must not load it until the threshold is reached. Forward voltage is 1.2 V maximum at 200 mA, typical for a silicon junction of this die size. The base product number is 1N4733 — the 'A' suffix denotes ±5% tolerance (versus ±10% for the non-suffix variant), and the 'UR' suffix indicates the DO-213AB MELF package. When ordering, confirm the full suffix matches your BOM line to avoid receiving a different package variant.","metaTitle":"Microchip 1N4733AUR Zener Diode, 5.1 V, 1 W, DO-213AB MELF","metaDescription":"Microchip Technology 1N4733AUR zener diode, 5.1 V nominal, ±5% tolerance, 1 W power dissipation. DO-213AB MELF surface-mount 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":"1N4733","Impedance (Max) (Zzt)":"7 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"DO-213AB","Voltage - Zener (Nom) (Vz)":"5.1 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":"$3.3300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc4f081abf264e3fbd0ed0846e93ec3c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N4733AUR/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum power dissipation of the 1N4733AUR?","answer":"The 1N4733AUR is rated for 1 W continuous power dissipation. This rating assumes the device is mounted on a suitable substrate; derating is required at ambient temperatures above 25°C per the thermal resistance curve in the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N4733AUR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N4733AUR 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}}