{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6632US","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6632US","canonicalUrl":"https://icboms.com/microchip/1N6632US","factsUrl":"https://icboms.com/api/mcp/products/1N6632US","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6632US Zener diode, 3.3 V nominal, 5 W power, ±5% tolerance, SQ-MELF B package, surface mount, D-5B.","salesMarkdown":"## 3.3 V Zener with 5 W dissipation The 1N6632US is a 3.3 V Zener diode rated for 5 W continuous power dissipation in a surface-mount SQ-MELF B package. The ±5% tolerance on the nominal Zener voltage means the actual breakdown sits between 3.135 V and 3.465 V at the test current — tight enough for a basic shunt regulator or voltage reference, but not for precision analog rails where a 1% or 0.5% part would be specified. The 5 W rating is the maximum power the diode can dissipate when the case temperature is held at 25°C or below. In practice, derate this figure for ambient temperatures above 25°C — the thermal resistance of the SQ-MELF package to the board determines how much current the diode can actually shunt. At 3.3 V, 5 W corresponds to roughly 1.5 A of Zener current, but the board layout and copper area under the package will limit that in a real assembly. ## Temperature range and reverse leakage Operating from -65°C to 175°C, the 1N6632US covers military and industrial temperature extremes without derating the voltage specification. The wide range suits avionics, downhole instrumentation, and engine-bay electronics where the ambient can swing beyond standard commercial limits. Reverse leakage is specified at 300 µA maximum when 1 V is applied across the junction — that is well below the Zener voltage, so it represents the leakage before breakdown. At elevated temperatures leakage rises exponentially; at 175°C the actual leakage may approach the milliampere range, which matters for battery-powered or high-impedance bias circuits where standby current must stay low. ## Active production and sourcing The SQ-MELF B package (D-5B supplier device code) is a hermetic ceramic surface-mount package with a metallized termination band. It is designed for high-reliability soldering processes and offers good thermal cycling performance compared to plastic packages.","metaTitle":"Microchip 1N6632US Zener Diode, 3.3 V, 5 W, SQ-MELF","metaDescription":"1N6632US Zener diode from Microchip Technology: 3.3 V nominal, 5 W power, ±5% tolerance, SQ-MELF surface-mount package, -65°C to 175°C range.","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":"5 W","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, B","lifecycle_stage":"eol_hot","Base Product Number":"1N6632","Impedance (Max) (Zzt)":"500 Ohms","Operating Temperature":"-65°C~175°C","Supplier Device Package":"D-5B","Voltage - Zener (Nom) (Vz)":"3.3 V","Current - Reverse Leakage @ Vr":"300 µA @ 1 V","Voltage - Forward (Vf) (Max) @ If":"1.5 V @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d8f5875a647571c98402a6a536757bfe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6632US/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 1N6632US and get a price?","answer":"The 1N6632US is sourced through independent and authorized distribution. No stock-holding claim is made here — each order is quoted against the BOM line."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6632US","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6632US 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}}