{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6638US/TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6638US-TR","canonicalUrl":"https://icboms.com/microchip/1N6638US-TR","factsUrl":"https://icboms.com/api/mcp/products/1N6638US%2FTR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6638US/TR fast recovery diode, Standard type, 125 V DC reverse, 300 mA average rectified, 20 ns trr, SQ-MELF D-5D package, Tape & Reel.","salesMarkdown":"## Fast recovery in a hermetic surface-mount package The Microchip 1N6638US/TR is a fast-recovery standard diode rated for 125 V DC reverse and 300 mA average rectified current, with a reverse recovery time of 20 ns. The SQ-MELF D-5D package is a hermetic, surface-mount ceramic barrel — the same footprint as a DO-213AB but with a full glass seal that holds up to moisture and thermal cycling better than plastic SMD packages. ## Parametric profile for snubbing and rectification Forward voltage is 1.1 V maximum at 200 mA — a typical silicon fast-recovery drop, not Schottky-level, but the 20 ns recovery time means the stored charge clears quickly enough to avoid cross-conduction in a half-bridge leg. Reverse leakage is 500 nA at 125 V, which at 25°C is negligible; at 175°C junction it will rise but stays within the die's thermal budget for pulsed duty. The D-5D package (SQ-MELF) has a metallized end-cap termination that reflows onto the board pad with a standard solder profile; the ceramic body absorbs less moisture than a plastic SOT-23, which matters for long-term storage in uncontrolled environments.","metaTitle":"Microchip 1N6638US/TR Fast Recovery Diode","metaDescription":"Microchip 1N6638US/TR fast recovery diode, 125V 300mA, 20ns trr, SQ-MELF D-5D 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","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR)","Diode Type":"Standard","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, D","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"1N6638","Capacitance @ Vr, F":"2.5pF @ 0V, 1MHz","Supplier Device Package":"D-5D","Reverse Recovery Time (trr)":"20 ns","Current - Reverse Leakage @ Vr":"500 nA @ 125 V","Voltage - DC Reverse (Vr) (Max)":"125 V","Current - Average Rectified (Io)":"300mA","Operating Temperature - Junction":"-65°C~175°C","Voltage - Forward (Vf) (Max) @ If":"1.1 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.7250","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6638US%2FTR/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time of the 1N6638US/TR?","answer":"The 1N6638US/TR has a reverse recovery time (trr) of 20 ns, placing it in the fast-recovery class (≤500 ns, >200 mA Io)."},{"question":"How can I get pricing and availability for the 1N6638US/TR?","answer":"Submit a request through the storefront; the part is sourced to order through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6638US-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6638US-TR 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}}