{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6628US/TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6628US-TR","canonicalUrl":"https://icboms.com/microchip/1N6628US-TR","factsUrl":"https://icboms.com/api/mcp/products/1N6628US%2FTR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6628US/TR fast recovery rectifier diode, standard type, 2.3 A average, 600 V reverse, 45 ns trr, SQ-MELF E package, D-5B, tape and reel.","salesMarkdown":"## What the 45 ns trr and 2.3 A rating actually decide The 1N6628US/TR is a fast recovery rectifier with a reverse recovery time of 45 ns and an average rectified current rating of 2.3 A. The 45 ns trr puts it in the class that switches cleanly in a 100 kHz power supply without the diode staying on long enough to short the transformer secondary — the stored charge clears fast enough that the reverse recovery spike stays below the FET's avalanche rating. The 2.3 A average is the DC load it can carry in a continuous conduction mode boost or flyback stage; the forward drop of 1.5 V at 4 A means the conduction loss at 2.3 A is roughly 3.5 W, which the SQ-MELF package sinks through the board copper. ## 600 V blocking and the thermal envelope The 600 V reverse voltage covers 400 VDC bus rails (typical in power-factor-correction stages) with derating margin. Reverse leakage is 2 µA at that 600 V stress — negligible at room temperature but worth a thermal check if the junction runs near the 150°C max. The junction temperature range of -65°C to 150°C is the military-grade band; this diode is comfortable in an avionics power supply or an outdoor telecom rectifier that sees -40°C startup. ## SQ-MELF footprint — board-fit note The SQ-MELF, E package is a surface-mount, square-ended MELF with metallized terminations — no gull-wing leads to inspect, but the solder joint is purely on the end caps. The supplier device package is D-5B, which is Microchip's own code for this SQ-MELF outline. On the board, the pad geometry should match the D-5B land pattern: the end-cap wets to the pad, and the body sits above the board. The 40 pF junction capacitance at 10 V, 1 MHz is low enough that switching losses in a 200 kHz converter are secondary to the trr losses.","metaTitle":"Microchip 1N6628US/TR Fast Recovery Diode, 2.3 A, 600 V","metaDescription":"Microchip Technology 1N6628US/TR fast recovery rectifier, 2.3 A average, 600 V reverse, 45 ns trr, SQ-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","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR)","Diode Type":"Standard","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, E","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"1N6628","Capacitance @ Vr, F":"40pF @ 10V, 1MHz","Supplier Device Package":"D-5B","Reverse Recovery Time (trr)":"45 ns","Current - Reverse Leakage @ Vr":"2 µA @ 600 V","Voltage - DC Reverse (Vr) (Max)":"600 V","Current - Average Rectified (Io)":"2.3A","Operating Temperature - Junction":"-65°C~150°C","Voltage - Forward (Vf) (Max) @ If":"1.5 V @ 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$18.1800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f5b0a05537ab86a0d8f4acc7b4ded0ad.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6628US%2FTR/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time of 1N6628US/TR?","answer":"The reverse recovery time (trr) is 45 ns. That is the time it takes the diode to turn off after forward conduction — short enough for switching power supplies running in the 100 kHz range without excessive reverse recovery current."},{"question":"What package does 1N6628US/TR come in?","answer":"The package is SQ-MELF, E, with the supplier device package designated D-5B. It is a surface-mount, square-ended MELF package supplied in Tape & Reel for automated pick-and-place assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6628US-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6628US-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}}