{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FERD20S100SB-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"FERD20S100SB-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/FERD20S100SB-TR","factsUrl":"https://icboms.com/api/mcp/products/FERD20S100SB-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics FERD20S100SB-TR, FERD (Field Effect Rectifier Diode), 100 V reverse, 20 A average rectified, 780 mV forward drop at 10 A, 175 °C junction, DPAK surface mount.","salesMarkdown":"## 20 A in a DPAK — what the current rating tells you The FERD20S100SB-TR is a 100 V, 20 A average rectified FERD diode from STMicroelectronics in a DPAK (TO-252) package. The 20 A rating is the average rectified current at the case temperature — the actual current you can pull continuously depends on the board copper area under the tab and the airflow. At 20 A the forward drop is 780 mV at 10 A, rising with current and temperature, so the conduction loss budget needs a real thermal calculation, not just the headline number. ## FERD vs Schottky — the trade-off that matters A FERD (Field Effect Rectifier Diode) sits between a standard fast-recovery PN diode and a Schottky. It gives a lower forward voltage than a PN diode — 780 mV at 10 A — but with a higher reverse voltage rating than most Schottkys at this current. The reverse leakage is 100 µA at 100 V, which is higher than a PN diode but lower than a Schottky of the same voltage class. If your design runs hot and the reverse voltage spikes above 60 V, the FERD is the better choice over a Schottky; if you need the absolute lowest Vf at low voltage, a Schottky still wins. ## 175°C junction — where it fits The maximum junction temperature is 175°C. That puts it in the industrial/power-supply class — rated for the hot side of a PFC stage, a DC-DC converter output, or a motor-drive rectifier bridge where the ambient inside the enclosure hits 85°C or more. The DPAK tab is the thermal path; the datasheet's thermal resistance figures assume a minimum copper pad area on the PCB. If you are laying out a board for this part, budget a 1-inch-square copper pour under the tab with thermal vias to the inner plane. The DPAK package is a common footprint, so second-sourcing from other manufacturers with a similar 100 V, 20 A rated diode in TO-252 is straightforward if you need a dual-source hedge.","metaTitle":"ST FERD20S100SB-TR FERD Diode, 100V 20A DPAK","metaDescription":"ST FERD20S100SB-TR FERD diode, 100V reverse, 20A average, 780mV Vf at 10A, 175°C Tj max, DPAK. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"FERD (Field Effect Rectifier Diode)","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","lifecycle_stage":"eol_hot","Supplier Device Package":"DPAK","Current - Reverse Leakage @ Vr":"100 µA @ 100 V","Voltage - DC Reverse (Vr) (Max)":"100 V","Current - Average Rectified (Io)":"20A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"780 mV @ 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.89","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.95000","currency":"USD"},{"qty":10,"price":"$0.83200","currency":"USD"},{"qty":100,"price":"$0.63810","currency":"USD"},{"qty":500,"price":"$0.50440","currency":"USD"},{"qty":1000,"price":"$0.41248","currency":"USD"},{"qty":2500,"price":"$0.41248","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8af77a43b5ca2142aabfeb9e8f32aee2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between FERD20S100SB-TR and a Schottky diode?","answer":"A FERD (Field Effect Rectifier Diode) offers a forward voltage lower than a standard PN diode but higher than a Schottky — 780 mV at 10 A for this part. The FERD is better suited for applications where reverse voltage exceeds 60 V, where a Schottky would leak too much at high temperature."},{"question":"Is FERD20S100SB-TR RoHS compliant?","answer":"Yes, the FERD20S100SB-TR is ROHS3 compliant."},{"question":"What is the maximum junction temperature for FERD20S100SB-TR?","answer":"The maximum junction temperature is 175°C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/FERD20S100SB-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/FERD20S100SB-TR 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}}