{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAS 40-04 B5003","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BAS-40-04-B5003","canonicalUrl":"https://icboms.com/infineon/BAS-40-04-B5003","factsUrl":"https://icboms.com/api/mcp/products/BAS%2040-04%20B5003","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BAS 40-04 B5003, Schottky diode, 1 pair series connection, 40 V DC reverse voltage, 120 mA average rectified current, 100 ps reverse recovery time, SOT-23-3 surface mount.","salesMarkdown":"The Infineon BAS 40-04 B5003 is a dual series-connected Schottky diode in a SOT-23-3 surface-mount package. It handles up to 40 V reverse voltage and 120 mA average rectified current per diode, with a reverse recovery time of 100 ps — typical for a small-signal Schottky. The series configuration is useful for applications like high-speed switching, OR-ing diodes, and clamping in low-voltage, low-current rails. The 150 °C maximum junction temperature suits it for warm environments inside a power supply or industrial controller, though the SOT-23 package limits total dissipation. ## Obsolete — what that means for a BOM line Infineon lists the BAS 40-04 B5003 as obsolete. Any new design should avoid this part; for existing boards, the procurement team should qualify a pin-compatible replacement or secure a last-time-buy lot through a broker. The 40 V reverse voltage rating covers typical 12 V and 24 V rails with margin, but not 48 V systems. The 120 mA average current per diode is a small-signal level — fine for logic-level OR-ing, signal clamping, or detector circuits, but not for power rectification. The 100 ps reverse recovery time is the headline spec for a Schottky: it enables clean switching in RF detectors, high-speed data-line protection, or switching regulators running above 1 MHz. Forward voltage drops 1 V at 40 mA, which is higher than some low-Vf Schottkys, so for battery-powered circuits with sub-100 mA loads the forward loss may matter. Reverse leakage is 1 µA at 30 V — typical for a 40 V Schottky, but worth checking if the circuit operates near the maximum reverse voltage at elevated temperature, where leakage climbs.","metaTitle":"BAS 40-04 B5003 Schottky Diode, 40 V 120 mA, SOT-23","metaDescription":"Infineon BAS 40-04 B5003 dual series Schottky diode, 40 V reverse voltage, 120 mA average rectified current, 100 ps trr, SOT-23.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Speed":"Small Signal =< 200mA (Io), Any Speed","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"BAS 40","Diode Configuration":"1 Pair Series Connection","Supplier Device Package":"PG-SOT23","Reverse Recovery Time (trr)":"100 ps","Current - Reverse Leakage @ Vr":"1 µA @ 30 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Operating Temperature - Junction":"150°C(Max)","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/44df76da5149267357870826728c6c92.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for BAS 40-04 B5003?","answer":"Infineon has not published an official successor for the BAS 40-04 B5003. For a pin-compatible replacement, look for a dual series Schottky in SOT-23 with a 40 V reverse voltage and 120 mA or higher current rating — the BAT54 series (e.g., BAT54A) is a common cross-shop candidate, though verify forward voltage and leakage match your circuit. No single drop-in is guaranteed without testing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BAS-40-04-B5003","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BAS-40-04-B5003 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}}