{"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. The tube shipping medium is typical for through-hole power devices — no reel, so pick-and-place requires tube feeders or manual insertion. ST continues to manufacture the FERD family for the industrial and automotive power markets. The part is ROHS3 compliant, meeting the current EU exemption limits. 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","stockQuantity":0,"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},"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":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}