{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAS40-04B5003","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BAS40-04B5003","canonicalUrl":"https://icboms.com/infineon/BAS40-04B5003","factsUrl":"https://icboms.com/api/mcp/products/BAS40-04B5003","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BAS40-04B5003, Automotive AEC-Q101 Schottky Diode, 1 Pair Series Connection, 40 V, 120 mA (DC) per diode, 1 V @ 40 mA, SOT-23-3 Surface Mount.","salesMarkdown":"The Infineon BAS40-04B5003 is a dual Schottky diode in a series-connected configuration, housed in a standard SOT-23-3 surface-mount package. It is rated for a maximum reverse voltage of 40 V and delivers 120 mA of average rectified current per diode. The forward voltage is specified at 1 V maximum when conducting 40 mA, which is typical for a small-signal Schottky. This part is qualified to AEC-Q101, making it suitable for automotive under-hood and cabin electronics, as well as industrial control, power supply OR-ing, and high-speed switching where fast recovery and low forward drop matter. ## 40 V reverse voltage and 120 mA — what that buys you The 40 V reverse voltage gives you headroom for clamping 12 V and 24 V automotive rails, while the 120 mA per diode handles signal-level loads like relay coil suppression, logic-level translation, and protection clamps on sensor inputs. The series configuration (cathode of one diode to anode of the other) lets you build a voltage doubler or a bidirectional clamp in one package, saving board space over two discrete SOT-23s. ## AEC-Q101 and junction temperature AEC-Q101 qualification means this diode has passed automotive-grade stress tests including HBM ESD, temperature cycling, and high-temperature reverse bias. The junction is rated to 150 °C, so it can sit next to a hot regulator or in an engine-bay environment without derating concerns. The active lifecycle status means Infineon is still manufacturing this part — no last-time-buy risk for production runs. ## SOT-23-3 — field-swappable footprint The SOT-23-3 package (also known as TO-236-3 or SC-59) is one of the most common three-pin surface-mount footprints. It is easy to hand-solder with a fine-tip iron, and the part marking is usually legible under a loupe. No hot-air station needed for rework — a field swap is straightforward if you have tweezers and a steady hand.","metaTitle":"Infineon BAS40-04B5003 Schottky Diode, 40V, AEC-Q101, SOT-23","metaDescription":"Infineon BAS40-04B5003 automotive Schottky diode, 40V reverse voltage, 1V forward drop at 40mA, SOT-23-3 package. AEC-Q101 qualified. Available to order.","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":"Automotive, AEC-Q101","Package":"Bulk","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","lifecycle_stage":"eol_hot","Diode Configuration":"1 Pair Series Connection","Supplier Device Package":"PG-SOT23-3-3","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8f6cd2d3ea2609775832c074f4cfd4da.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BAS40-04B5003 automotive qualified?","answer":"Yes, it is AEC-Q101 qualified, as indicated by the Automotive series designation. This means it has passed the automotive-grade reliability tests for use in vehicle electronics."},{"question":"What are the replacements for BAS40-04B5003?","answer":"This is an active part with no official successor listed. For a pin-compatible alternative, look for other AEC-Q101 qualified dual series Schottky diodes in SOT-23-3, such as the BAT54 series from various manufacturers, but verify the reverse voltage and current ratings match your design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BAS40-04B5003","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BAS40-04B5003 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}}