{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS30SM120STN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS30SM120STN","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS30SM120STN","factsUrl":"https://icboms.com/api/mcp/products/STPS30SM120STN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS30SM120STN, Schottky rectifier, 120 V, 30 A, Fast Recovery ≤ 500 ns, TO-220-3 (TO-220AB narrow leads), tube.","salesMarkdown":"## 30 A, 120 V Schottky — output rectifier for power supplies The STPS30SM120STN is a 30 A, 120 V Schottky rectifier from STMicroelectronics, housed in a TO-220AB narrow-lead through-hole package. It is designed for high-current output rectification in switch-mode power supplies, freewheeling diodes in DC-DC converters, and reverse-polarity protection circuits where low forward voltage drop and fast switching are required. ## Forward drop and thermal budget at 30 A The forward voltage is specified at 950 mV maximum at 30 A — this is the conduction loss that sets the heatsink requirement. Reverse leakage is 275 µA at 120 V rated reverse voltage — typical for a high-voltage Schottky at elevated temperature. Leakage doubles with every 10 °C rise above 25 °C, so the thermal design should account for the leakage contribution to the total power dissipation at high junction temperatures. STMicroelectronics lists the STPS30SM120STN as obsolete.","metaTitle":"STPS30SM120STN Schottky Rectifier 30A 120V TO-220AB","metaDescription":"STPS30SM120STN 30 A, 120 V Schottky rectifier in TO-220AB narrow-lead package. 950 mV forward drop at 30 A.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tube","Technology":"Schottky","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STPS30","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AB Narrow Leads","Current - Reverse Leakage @ Vr":"275 µA @ 120 V","Voltage - DC Reverse (Vr) (Max)":"120 V","Current - Average Rectified (Io)":"30A","Operating Temperature - Junction":"150°C (Max)","Voltage - Forward (Vf) (Max) @ If":"950 mV @ 30 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.9700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/eef385b549afb33e0a48d397691a4a2d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS30SM120STN/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for STPS30SM120STN?","answer":"STMicroelectronics has not published an official successor or cross-reference for the STPS30SM120STN. A pin-compatible alternative in the same TO-220AB footprint would need to match the 30 A, 120 V rating and the narrow-lead variant — confirm the lead form and thermal pad dimensions before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS30SM120STN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS30SM120STN 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}}