{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS30M120STN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS30M120STN","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS30M120STN","factsUrl":"https://icboms.com/api/mcp/products/STPS30M120STN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS30M120STN, Schottky rectifier, 30A average rectified current, 120V DC reverse voltage, fast recovery ≤500ns, TO-220-3 through-hole package, tube.","salesMarkdown":"The STPS30M120STN is a 30A, 120V Schottky rectifier from STMicroelectronics, housed in a through-hole TO-220-3 package with narrow leads (TO-220AB). It's rated for fast recovery — ≤500ns at >200mA — which puts it in the class of high-speed switching diodes used in power supplies, not just line-frequency rectification. The 900mV forward drop at 30A is typical for a 120V Schottky at this current level; the 345µA reverse leakage at 120V is a reasonable trade-off for the speed. This is not a part you can design into a new BOM with confidence of long-term supply; it belongs in a repair, a last-time-buy fulfillment, or a legacy production run where the board is already qualified. The 30A average rectified current (Io) is the continuous DC rating — it tells you the maximum load current the diode can handle in a typical forward-conduction application. For a 30A output rail, you'd normally derate by 20-30% for reliability, so this part suits a 20-24A continuous load in a well-ventilated design. The 120V reverse voltage (Vr) is the maximum DC blocking voltage; in a 48V or 60V bus, you have ample margin, but in a 100V bus you're at the edge — a 150V or 200V rated part would be safer for transients. The fast recovery spec (≤500ns) is what distinguishes this from a standard 60Hz rectifier: it can switch at tens to low hundreds of kHz without excessive reverse-recovery losses, making it suitable for the secondary side of a forward converter or flyback supply. The 900mV forward drop at 30A is the conduction loss figure — at 30A, that's 27W of dissipation, which demands a heatsink with good thermal management, especially given the 150°C maximum junction temperature. ## Package and mounting — TO-220 through-hole The narrow-lead variant (TO-220AB Narrow Leads) fits standard TO-220 footprints but has slightly thinner leads — check your PCB hole diameter if you're replacing a standard TO-220. It ships in tube, which is typical for through-hole power devices. Hand-soldering is straightforward: the tab can be soldered to a copper pad on the board or bolted to a separate heatsink. For a 30A part, a heatsink is mandatory unless the duty cycle is very low.","metaTitle":"STPS30M120STN Schottky Rectifier","metaDescription":"STPS30M120STN Schottky rectifier, 30A average, 120V reverse, fast recovery ≤500ns. TO-220-3 through-hole. Request quote.","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":"345 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":"900 mV @ 30 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1500","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS30M120STN/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement or equivalent for STPS30M120STN?","answer":"The evidence does not list an official STMicroelectronics replacement or cross-reference for the STPS30M120STN. A common functional equivalent would be another 30A, 120V Schottky rectifier in a TO-220 package, such as the STPS30M120SY (which is the surface-mount D2PAK variant) — but verify pin compatibility and thermal performance for your specific board. For a pin-compatible through-hole alternative, check the STPS30H100CT (100V) or STPS30L60CT (60V) if your voltage margin allows, or look at competitor parts like the MBR3045PT (45V) or MBR30100CT (100V) — always confirm the forward voltage, r"},{"question":"Where can I buy STPS30M120STN?","answer":"The STPS30M120STN is obsolete and not available through standard authorized distribution channels. Submit an RFQ for current availability and pricing — we confirm both at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS30M120STN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS30M120STN 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}}