{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAS40-05W","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BAS40-05W","canonicalUrl":"https://icboms.com/infineon/BAS40-05W","factsUrl":"https://icboms.com/api/mcp/products/BAS40-05W","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BAS40-05W Schottky diode, 40 V DC reverse voltage, 120 mA average rectified current per diode, 1 V forward voltage at 40 mA, 1 µA reverse leakage at 30 V, common cathode pair, SOT-323 surface mount package, active lifecycle.","salesMarkdown":"The Infineon BAS40-05W is a Schottky barrier diode array containing two diodes in a common-cathode configuration, housed in a PG-SOT323-3 surface-mount package. Schottky diodes switch fast with low forward voltage drop — here 1 V max at 40 mA per diode — making them useful for high-speed rectification, polarity protection, and clamping in low-voltage DC rails up to 40 V reverse. Each diode handles 120 mA average rectified current, and the pair shares the cathode pin, so it fits circuits needing two diodes with a common return. Reverse voltage is rated 40 V DC max — that is the ceiling for the blocking voltage; keep the rail below that with margin. ## Package and footprint — what to expect The BAS40-05W comes in a PG-SOT323-3 package (also known as SC-70). It is a three-pin surface-mount part: two anodes and one common cathode. The body is small — roughly 2.0 mm x 1.25 mm — so it fits tight layouts but needs a steady hand for rework. No lab bench required, but a fine-tip iron and magnification help. MSL rating is not in the record, but SOT-323 devices are typically MSL 1, so moisture sensitivity is rarely an issue.","metaTitle":"BAS40-05W Schottky Diode, 40 V, 120 mA, Common Cathode","metaDescription":"BAS40-05W Schottky diode: 40 V reverse voltage, 120 mA average rectified current per diode, 1 V forward drop at 40 mA, common cathode pair in SOT-323.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Speed":"Small Signal =< 200mA (Io), Any Speed","Series":"-","Package":"Bulk","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"SC-70, SOT-323","Product Status":"Active","lifecycle_stage":"eol_hot","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"PG-SOT323-3","Current - Reverse Leakage @ Vr":"1 µA @ 30 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Operating Temperature - Junction":"150°C","Voltage - Forward (Vf) (Max) @ If":"1 V @ 40 mA","Current - Average Rectified (Io) (per Diode)":"120mA (DC)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/44df76da5149267357870826728c6c92.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BAS40-05W/alternatives.json"},"ai":{"faq":[{"question":"Can BAS40-05W replace BAT54?","answer":"The BAS40-05W and BAT54 are both Schottky diodes but differ in configuration and ratings. The BAS40-05W is a common-cathode pair in SOT-323, while the BAT54 is typically a single diode or dual in different pinouts (SOT-23). The BAS40-05W has a 40 V reverse voltage and 120 mA per diode; the BAT54 is rated 30 V and 200 mA. They are not direct drop-in replacements without verifying the circuit topology and pinout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BAS40-05W","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BAS40-05W 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}}