{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS1170AFN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS1170AFN","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS1170AFN","factsUrl":"https://icboms.com/api/mcp/products/STPS1170AFN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS1170AFN, Schottky rectifier, 170 V, 1 A, Vf 820 mV, fast recovery ≤500 ns, 175°C Tj, SMAflat, ECOPACK2, Tape & Reel.","salesMarkdown":"## 170 V Schottky in an SMAflat package — where this part sits The STPS1170AFN is a 170 V, 1 A Schottky rectifier from STMicroelectronics, housed in the low-profile DO-221AC (SMA Flat Leads) package. ## Forward drop and reverse leakage — the efficiency trade At 1 A forward current the maximum forward voltage is 820 mV, and reverse leakage at the 170 V rated voltage is 1.5 µA. That 820 mV Vf is higher than a low-Vf 40 V Schottky but expected for a 170 V part — the voltage rating costs you some forward efficiency. The 1.5 µA leakage at full reverse bias is low enough that it won't dominate standby losses in most circuits, but if your design idles at 170 V reverse for long periods, derate for temperature: leakage doubles roughly every 10°C above 25°C junction. ## Package and mounting — SMAflat footprint note The SMA Flat Leads package (DO-221AC) is a surface-mount form factor with a lower profile than standard SMA. The supplier device package is called SMAflat. It's compatible with standard SMA solder pads but the lead shape is different — verify the land pattern in the datasheet if you're migrating from a conventional SMA. The part ships on Tape & Reel, which is the usual for automated pick-and-place. The part is part of the ECOPACK2 series, meaning it meets ST's halogen-free and antimony-free material declaration for RoHS compliance. No AEC-Q101 qualification is listed in the record, so it's not formally automotive-grade — stick to industrial, telecom, and consumer applications unless you run your own qualification.","metaTitle":"STPS1170AFN Schottky Diode, 170 V, 1 A, SMA Flat Leads","metaDescription":"STPS1170AFN Schottky rectifier: 170 V, 1 A, 820 mV Vf, 175°C Tj, fast recovery ≤500ns. Active, ECOPACK2, SMAflat.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"ECOPACK®2","Package":"Tape & Reel (TR)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"DO-221AC, SMA Flat Leads","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS1170","Capacitance @ Vr, F":"-","Supplier Device Package":"SMAflat","Current - Reverse Leakage @ Vr":"1.5 µA @ 170 V","Voltage - DC Reverse (Vr) (Max)":"170 V","Current - Average Rectified (Io)":"1A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"820 mV @ 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/132654de3829fa7bba9f38ecad63440a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS1170AFN/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STPS1170AFN?","answer":"The STPS1170AFN does not have a direct pin-compatible second source listed in the available records. Within the same STPS1170 family, the base product number STPS1170 covers multiple package variants — the AFN suffix specifically denotes the SMA Flat Leads package. If you need a second source, look for a 170 V, 1 A Schottky in a DO-221AC package from another manufacturer, but verify the land pattern and thermal performance against your layout."},{"question":"Can STPS1170AFN be used for voltage clamping applications?","answer":"Yes, a 170 V Schottky can serve as a voltage clamp, but the 1 A average rectified current rating limits the continuous clamping current. For transient overvoltage clamping (e.g., inductive kickback, flyback diode), the fast recovery characteristic (≤500 ns) is beneficial. However, for sustained clamping or ESD protection, a dedicated TVS or transient suppressor is usually a better fit. Check the peak forward surge current rating in the full datasheet before committing."},{"question":"Is STPS1170AFN a fast recovery diode?","answer":"It is a Schottky diode, which inherently has fast switching — Schottky diodes are majority-carrier devices with no reverse recovery charge. The datasheet explicitly lists a speed rating of Fast Recovery ≤500 ns at >200 mA, which confirms it meets the fast-recovery classification for designs that require that specification line item."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS1170AFN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS1170AFN when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}