{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VS-40HF40","brand":"Vishay","brandSlug":"vishay","productSlug":"VS-40HF40","canonicalUrl":"https://icboms.com/vishay/VS-40HF40","factsUrl":"https://icboms.com/api/mcp/products/VS-40HF40","rawCanonicalId":null},"summary":{"shortDescription":"Vishay VS-40HF40, Standard Recovery Diode, 400 V DC Reverse, 40 A Average Rectified, 1.3 V Forward @ 125 A, DO-203AB (DO-5) Stud Mount, -65°C to 190°C Junction.","salesMarkdown":"## 40 A, 400 V standard recovery rectifier The Vishay VS-40HF40 is a general-purpose standard recovery diode rated for 400 V reverse voltage and 40 A average rectified current. It is built for line-frequency rectification in power supplies, battery chargers, welding equipment, and DC motor drives where switching speed is not the priority. ## Forward drop and thermal headroom Maximum forward voltage is 1.3 V at 125 A — a high-current test point that shows the diode can handle surge conditions well above the 40 A average rating. Junction temperature range spans -65°C to 190°C, giving substantial thermal margin in forced-air or liquid-cooled heatsink assemblies. ## Stud-mount package and installation Housed in a DO-203AB stud-mount package, the VS-40HF40 is designed for chassis mounting with a threaded stud and hex base. The anode connects through the stud to the heatsink, so the mounting surface must be electrically isolated or the heatsink must float. The package suits bus-bar and cable-lug terminations common in high-current industrial rectifier stacks. ## Leakage and reverse recovery Reverse leakage is 9 mA at the full 400 V blocking voltage — a figure that rises with junction temperature, so thermal design should budget for increased leakage at the 190°C limit. Standard recovery time exceeds 500 ns, confirming this is not a fast-recovery or soft-recovery diode; it is intended for mains rectification, not inverter or SMPS output stages.","metaTitle":"VS-40HF40 Diode, 400V 40A Standard Recovery, DO-203AB","metaDescription":"VS-40HF40 standard recovery diode, 400V reverse, 40A average, 1.3V forward drop at 125A. DO-203AB stud mount, -65°C to 190°C junction.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Speed":"Standard Recovery >500ns, > 200mA (Io)","Package":"Bulk","Diode Type":"Standard","Mounting Type":"Chassis, Stud Mount","Package / Case":"DO-203AB, DO-5, Stud","lifecycle_stage":"eol_hot","Supplier Device Package":"DO-203AB (DO-5)","Current - Reverse Leakage @ Vr":"9 mA @ 400 V","Voltage - DC Reverse (Vr) (Max)":"400 V","Current - Average Rectified (Io)":"40A","Operating Temperature - Junction":"-65°C ~ 190°C","Voltage - Forward (Vf) (Max) @ If":"1.3 V @ 125 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.22","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.22000","currency":"USD"},{"qty":10,"price":"$7.43000","currency":"USD"},{"qty":100,"price":"$6.15100","currency":"USD"},{"qty":500,"price":"$5.37900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/46b63ae6f865bcf6feecfa5a2808af6c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does VS-40HF40 come in?","answer":"The VS-40HF40 is supplied in a DO-203AB (DO-5) stud-mount package. It is a chassis-mount device with a threaded stud for mechanical and electrical connection to a heatsink or bus bar."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VS-40HF40","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VS-40HF40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}