{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS30120CTN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS30120CTN","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS30120CTN","factsUrl":"https://icboms.com/api/mcp/products/STPS30120CTN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS30120CTN Schottky rectifier, 120 V reverse voltage, 15 A average rectified current per diode, 1 pair common cathode, TO-220-3 through-hole package, fast recovery ≤500 ns.","salesMarkdown":"The 920 mV forward drop at 15 A is typical for a 120 V Schottky — you trade a little efficiency for the higher voltage headroom versus a 45 V or 60 V part. The fast recovery spec (≤500 ns, >200 mA) makes it suitable for high-frequency switching supplies where a standard recovery diode would burn too much reverse-recovery loss. With a 175°C maximum junction temperature, it can handle the thermal stress of a cramped power supply or motor-drive stage. ST lists the STPS30120CTN as obsolete. For a production BOM that already uses this diode, the path is either last-time-buy inventory or a qualified second source through independent distribution. The common-cathode TO-220-3 footprint is widely used, so a pin-compatible Schottky from another manufacturer (same 120 V, 15 A per leg rating) is a realistic cross-shopping target — but you need to verify forward voltage, leakage, and thermal performance against your design margin, not just the pinout. ## Reverse leakage and junction temperature — the thermal trade-off At 120 V reverse bias, the STPS30120CTN leaks 15 µA. That is low enough for most power supplies, but at 175°C junction the leakage multiplies — budget for it in standby-power calculations if the diode runs hot. The 175°C max junction rating gives headroom over the usual 150°C limit, which helps in a TO-220 bolted to a heatsink in a forced-air chassis.","metaTitle":"STPS30120CTN Schottky Diode, 120 V, 15 A, TO-220-3, Obsolete","metaDescription":"STPS30120CTN Schottky rectifier, 120 V reverse voltage, 15 A per diode, common cathode pair in TO-220-3. Fast recovery ≤500 ns.","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":"STPS30120","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"TO-220AB Narrow Leads","Current - Reverse Leakage @ Vr":"15 µA @ 120 V","Voltage - DC Reverse (Vr) (Max)":"120 V","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"920 mV @ 15 A","Current - Average Rectified (Io) (per Diode)":"15A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.6900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d9afb4dcd848c5b88c79844481dcd251.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS30120CTN/alternatives.json"},"ai":{"faq":[{"question":"Is STPS30120CTN obsolete?","answer":"Yes, ST lists the STPS30120CTN as obsolete. No official replacement is recorded, so sourcing is through surplus or broker channels."},{"question":"What is STPS30120CTN's speed rating?","answer":"The STPS30120CTN is a fast-recovery Schottky with recovery time ≤500 ns at forward current >200 mA, suitable for high-frequency rectification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS30120CTN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS30120CTN 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}}