{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"KBU8K-E4/51","brand":"Vishay","brandSlug":"vishay","productSlug":"KBU8K-E4-51","canonicalUrl":"https://icboms.com/vishay/KBU8K-E4-51","factsUrl":"https://icboms.com/api/mcp/products/KBU8K-E4%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay KBU8K-/51 single-phase bridge rectifier, 800 V peak reverse, 8 A average, through-hole 4-SIP KBU package, tray.","salesMarkdown":"## 800 V, 8 A single-phase bridge — what it means for the BOM The KBU8K-E4/51: The Vishay KBU8K-/51 is a single-phase bridge rectifier in the standard KBU through-hole package, rated for 800 V peak reverse voltage (Vrrm) and 8 A average rectified output current (Io). The 800 V peak reverse rating covers nominal 480 VAC three-phase line-to-line rectification with margin for line transients — a 480 Vrms line peaks at 679 V, so this part stays inside its abs-max ceiling even with a 10 % overvoltage. The 8 A average current is specified at the package's thermal limit; in a 50 °C ambient with natural convection, derate to about 6 A continuous to keep the junction below 150 °C (the TJ max per the datasheet). RoHS3 compliant, with no exemption conflicts for EU or UKCA markets. The standard KBU package is a mature, single-die SIP format that Vishay has produced for decades — no package-related obsolescence risk. As a single-phase bridge, the KBU8K-/51 converts AC input (50/60 Hz) to a pulsed DC bus in linear supplies, battery chargers, and low-power motor drives. The 800 V rating also suits it for 277 VAC single-phase industrial control transformers. The through-hole KBU package (4-SIP, 0.100-inch pitch) mates with standard PCB layouts and can be heatsunk via the metal tab — the junction-to-case thermal path is the limiting factor for continuous current above 6 A.","metaTitle":"Vishay KBU8K-E4/51 Bridge Rectifier, 800 V, 8 A","metaDescription":"Vishay KBU8K-E4/51 single-phase bridge rectifier, 800 V peak reverse, 8 A average, through-hole KBU package, active production, RoHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tray","Diode Type":"Single Phase","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"4-SIP, KBU","lifecycle_stage":"eol_hot","Operating Temperature":"-50°C ~ 150°C (TJ)","Supplier Device Package":"KBU","Voltage - Peak Reverse (Max)":"800 V","Current - Reverse Leakage @ Vr":"10 µA @ 800 V","Current - Average Rectified (Io)":"8 A","Voltage - Forward (Vf) (Max) @ If":"1 V @ 8 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.82","priceTiers":[{"qty":1,"price":"$4.82000","currency":"USD"},{"qty":10,"price":"$4.33100","currency":"USD"},{"qty":25,"price":"$4.09400","currency":"USD"},{"qty":80,"price":"$3.54825","currency":"USD"},{"qty":250,"price":"$3.36624","currency":"USD"},{"qty":500,"price":"$3.02052","currency":"USD"},{"qty":1000,"price":"$2.83239","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4d37731941ab74ce2e4c0abb55e4acfb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/KBU8K-E4%2F51/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the KBU8K-/51 and get a price?","answer":"Sourced to order against an RFQ through independent and authorized distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/KBU8K-E4-51","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/KBU8K-E4-51 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}}