{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"GBU8B-E3/51","brand":"Vishay","brandSlug":"vishay","productSlug":"GBU8B-E3-51","canonicalUrl":"https://icboms.com/vishay/GBU8B-E3-51","factsUrl":"https://icboms.com/api/mcp/products/GBU8B-E3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay GBU8B-/51, Single Phase Bridge Rectifier, Standard Technology, 100 V Peak Reverse, 3.9 A Average, 1 Vf at 8 A, -55°C to 150°C, 4-SIP GBU Through Hole, Bulk.","salesMarkdown":"## 100 V peak reverse, 3.9 A average — the rectifier stage workhorse The GBU8B-E3/51: The GBU8B-/51: The Vishay GBU8B-/51 is a single-phase bridge rectifier in the standard GBU through-hole package, rated for 100 V peak reverse voltage and 3.9 A average rectified output current. It converts AC to pulsating DC in power supplies, battery chargers, and motor drive front-ends where the input voltage stays under 70 V RMS (100 V peak). The 1 V forward drop at 8 A surge gives a reasonable conduction loss profile for a 3.9 A continuous-rated part. The 150°C Tj ceiling also provides headroom for convection-cooled designs where the bridge runs near its rated current in a warm enclosure. Derate the average current above 100°C ambient per the datasheet curve; the 3.9 A rating is at 25°C case temperature. ## GBU package — rework and footprint reality The 4-SIP GBU package has four straight through-hole pins on a 5.08 mm pitch, standard for this power level. The large copper tab on the bottom of the package is the thermal path — it needs a soldered connection to the PCB copper pour or a heatsink clip for full current rating. Hand-rework is straightforward: heat all four pins and the tab simultaneously with a wide soldering iron tip or hot air, lift the part without lifting the pad. The pin 1 corner is chamfered on the package body; orientation is unambiguous.","metaTitle":"GBU8B-E3/51 Bridge Rectifier, 100 V, 3.9 A, GBU Package","metaDescription":"Vishay GBU8B-E3/51 single-phase bridge rectifier, 100 V peak reverse, 3.9 A average, 1 Vf at 8 A, -55°C to 150°C, GBU through-hole. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Diode Type":"Single Phase","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"4-SIP, GBU","lifecycle_stage":"eol_hot","Operating Temperature":"-55°C ~ 150°C (TJ)","Supplier Device Package":"GBU","Voltage - Peak Reverse (Max)":"100 V","Current - Reverse Leakage @ Vr":"5 µA @ 100 V","Current - Average Rectified (Io)":"3.9 A","Voltage - Forward (Vf) (Max) @ If":"1 V @ 8 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.06","priceTiers":[{"qty":1,"price":"$2.06000","currency":"USD"},{"qty":10,"price":"$1.85400","currency":"USD"},{"qty":100,"price":"$1.49010","currency":"USD"},{"qty":500,"price":"$1.22430","currency":"USD"},{"qty":1000,"price":"$1.08900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/518f0279b12a92fdbc6ce09bc2427078.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/GBU8B-E3%2F51/alternatives.json"},"ai":{"faq":[{"question":"Is GBU8B-/51 RoHS compliant?","answer":"Yes, the GBU8B-/51 is listed as ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/GBU8B-E3-51","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/GBU8B-E3-51 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}}