{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BU1208-E3/45","brand":"Vishay","brandSlug":"vishay","productSlug":"BU1208-E3-45","canonicalUrl":"https://icboms.com/vishay/BU1208-E3-45","factsUrl":"https://icboms.com/api/mcp/products/BU1208-E3%2F45","rawCanonicalId":null},"summary":{"shortDescription":"Vishay BU1208-/45 single-phase bridge rectifier, 800 V peak reverse, 3.4 A average, standard technology, through-hole isoCINK+ BU package, bulk.","salesMarkdown":"## 800 V, 3.4 A — single-phase bridge in a through-hole SIP The BU1208-E3/45: The Vishay BU1208-/45 is a single-phase bridge rectifier rated for 800 V peak reverse voltage and 3.4 A average rectified output current — sized for line-rectified DC supplies in industrial and appliance power stages where the input sees up to 600 VAC nominal with margin for line transients. Housed in the 4-pin isoCINK+ BU SIP, the through-hole package sits upright on the board — the pin pitch matches standard 5.08 mm spacing, so it slots into existing layouts for single-phase bridge footprints without a layout change. ## Forward drop and leakage — the thermal budget drivers Maximum forward voltage is 1.05 V at 6 A peak — this sets the conduction loss per half-cycle. At 3.4 A average, the forward drop sits lower, but the 1.05 V ceiling at the 6 A test point gives the derating curve a known anchor for worst-case junction temperature. Reverse leakage is 5 µA at the full 800 V blocking voltage — negligible at room temperature, but leakage doubles roughly every 10 °C junction rise. In a 105 °C ambient, budget for leakage current that can shift the bias in a high-impedance divider if the bridge feeds a resistive tap. ## Active production — compliance and sourcing RoHS3 compliant — the /45 suffix confirms lead-free plating and no restricted substances above the threshold.","metaTitle":"Vishay BU1208-E3/45 Bridge Rectifier, 800 V, 3.4 A","metaDescription":"Vishay BU1208-E3/45 single-phase bridge rectifier, 800 V peak reverse, 3.4 A average, isoCINK+ BU through-hole package. Active, ROHS3 compliant.","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, BU","lifecycle_stage":"eol_hot","Operating Temperature":"-55°C ~ 150°C (TJ)","Supplier Device Package":"isoCINK+™ BU","Voltage - Peak Reverse (Max)":"800 V","Current - Reverse Leakage @ Vr":"5 µA @ 800 V","Current - Average Rectified (Io)":"3.4 A","Voltage - Forward (Vf) (Max) @ If":"1.05 V @ 6 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.24","priceTiers":[{"qty":1,"price":"$2.24000","currency":"USD"},{"qty":10,"price":"$2.01200","currency":"USD"},{"qty":100,"price":"$1.61750","currency":"USD"},{"qty":500,"price":"$1.32892","currency":"USD"},{"qty":1000,"price":"$1.18206","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8aec119c6d2c94c29f8b8b4ed83d8ebc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BU1208-E3%2F45/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Vishay provide for the BU1208-/45?","answer":"Vishay confirms RoHS3 compliance for the BU1208-/45."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/BU1208-E3-45","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/BU1208-E3-45 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}}