{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FERD30H100STS","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"FERD30H100STS","canonicalUrl":"https://icboms.com/stmicroelectronics/FERD30H100STS","factsUrl":"https://icboms.com/api/mcp/products/FERD30H100STS","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics FERD series, FERD (Field Effect Rectifier Diode), FERD30H100STS, 100 V, 30 A, 745 mV @ 30 A, Fast Recovery =< 500ns, > 200mA (Io), Through Hole, TO-220-3 / TO-220AB, Tube.","salesMarkdown":"## 100 V, 30 A FERD — the conduction-loss trade-off The ST FERD30H100STS is a 100 V, 30 A average-rated Field Effect Rectifier Diode in a TO-220AB through-hole package. ST's FERD (Field Effect Rectifier Diode) technology combines a merged PiN-Schottky structure to deliver a forward voltage of 745 mV at the full 30 A rating — lower than a conventional ultrafast recovery diode at this current, though the 130 µA reverse leakage at 100 V is higher than a standard Schottky's. ## Forward drop vs leakage — where the FERD fits At 30 A the 745 mV forward drop translates to roughly 22 W of conduction loss at full current — a number that drives the heatsink selection. The TO-220AB tab, when bolted to a proper heatsink with thermal compound, keeps the junction-to-case temperature rise manageable. The 130 µA leakage at 100 V adds negligible standby loss in continuous-conduction designs but becomes a factor in high-temperature idle conditions where the leakage doubles with every 10°C rise above 25°C. The Fast Recovery =< 500ns, > 200mA (Io) spec classifies this as a fast-recovery rectifier — not an ultrafast (< 50 ns) part, but fast enough for line-frequency and moderate-frequency switching in the 20-100 kHz range typical of PFC and flyback converters. Above 100 kHz the recovery losses start to dominate; a true ultrafast diode would be a better fit. ## Package and mounting checklist The TO-220-3 (TO-220AB) package has a standard 2.54 mm pin pitch and a metal tab with a 3.7 mm mounting hole for bolt-down heatsinking. The through-hole leads suit wave-solder assembly and manual rework. ST continues to manufacture the FERD family for the industrial and automotive power markets. For dual-sourcing resilience, a buyer would need to qualify a similar-rated 100 V, 30 A TO-220AB diode from another manufacturer — typically a Schottky or ultrafast recovery diode — against the specific switching frequency and thermal profile of the application.","metaTitle":"ST FERD30H100STS FERD Diode, 100V 30A TO-220AB","metaDescription":"ST FERD30H100STS field-effect rectifier diode, 100V 30A average, 745mV Vf, 130µA leakage, TO-220AB. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Package":"Tube","Diode Type":"FERD (Field Effect Rectifier Diode)","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Supplier Device Package":"TO-220AB","Current - Reverse Leakage @ Vr":"130 µA @ 100 V","Voltage - DC Reverse (Vr) (Max)":"100 V","Current - Average Rectified (Io)":"30A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"745 mV @ 30 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.33","priceTiers":[{"qty":1,"price":"$1.33000","currency":"USD"},{"qty":10,"price":"$1.18500","currency":"USD"},{"qty":100,"price":"$0.92360","currency":"USD"},{"qty":500,"price":"$0.76298","currency":"USD"},{"qty":1000,"price":"$0.65678","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c22699af920eaf991b62b7664ffd48f1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FERD30H100STS/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to FERD30H100STS?","answer":"The STPS30L100CT is a 100 V, 30 A Schottky rectifier in the same TO-220AB package from ST. The key difference is the technology: the FERD30H100STS uses a merged PiN-Schottky structure that gives a lower forward drop (745 mV vs ~850 mV for the STPS30L100CT at 30 A) but higher reverse leakage (130 µA vs ~100 µA at 100 V). The FERD is a better fit for continuous-conduction designs where conduction loss dominates; the Schottky is preferable in high-temperature idle or light-load conditions where leakage matters more."},{"question":"Is FERD30H100STS RoHS compliant?","answer":"Yes, it is ROHS3 Compliant, meeting the latest EU RoHS exemption limits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/FERD30H100STS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/FERD30H100STS when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}