{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAS40B5000","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"BAS40B5000","canonicalUrl":"https://icboms.com/infineon/BAS40B5000","factsUrl":"https://icboms.com/api/mcp/products/BAS40B5000","rawCanonicalId":null},"summary":{"shortDescription":"Infineon BAS40B5000, Automotive AEC-Q101 Schottky Diode, Small Signal =< 200mA (Io), Any Speed, 40 V, 120 mA, SOT-23-3 / PG-SOT23, Surface Mount.","salesMarkdown":"## 40 V, 120 mA AEC-Q101 Schottky — what this diode is for The Infineon BAS40B5000 is a small-signal Schottky diode rated for 40 V DC reverse voltage and 120 mA average rectified current, housed in a PG-SOT23 surface-mount package. It carries AEC-Q101 automotive qualification, making it suitable for use in automotive electronic control units, sensor interfaces, and other systems requiring a certified device for under-hood or chassis-domain deployment. The Schottky construction gives a low forward voltage of 1 V at 40 mA and a fast switching characteristic — classified as Small Signal =< 200 mA, Any Speed. The 40 V reverse voltage rating provides adequate headroom for 12 V and 24 V automotive rails, though it is not intended for 48 V systems. At 120 mA average forward current this is a signal-level diode, not a power rectifier — it handles clamping, flyback catch, and low-current OR-ing, not bulk supply rectification. Reverse leakage is specified at 1 µA at 30 V, which is typical for a Schottky of this voltage class and acceptable for most low-power analog and digital inputs. Junction temperature is rated to 150 °C, matching the under-hood thermal requirement for AEC-Q101 devices. The 3 pF capacitance at 0 V, 1 MHz is low enough for high-frequency signal clamping up into the low-GHz range, though the SOT-23 package parasitics will dominate above a few hundred MHz. For RF detector or mixer applications, a smaller SOD-323 or SOD-523 Schottky would be a better fit; this part is optimised for general-purpose automotive and industrial signal conditioning. ## AEC-Q101 and lifecycle — no obsolescence concern It is an automotive-qualified series, which typically means longer production commitments and a well-managed PCN process compared to commercial-grade parts. For new designs, this part presents no lifecycle risk through the typical automotive program lifetime. ## SOT-23 footprint and mounting It is a surface-mount device with three leads — anode, cathode, and no separate substrate connection. The footprint is common across the BAS40 family and compatible with standard SOT-23 land patterns.","metaTitle":"Infineon BAS40B5000 Schottky Diode, AEC-Q101, 40 V, 120 mA","metaDescription":"Infineon BAS40B5000 is an AEC-Q101 automotive Schottky diode rated 40 V, 120 mA, in SOT-23 package. Small-signal speed, 1 µA leakage at 30 V. Active production.","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","Capacitance @ Vr, F":"3pF @ 0V, 1MHz","Supplier Device Package":"PG-SOT23","Current - Reverse Leakage @ Vr":"1 µA @ 30 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Current - Average Rectified (Io)":"120mA","Operating Temperature - Junction":"150°C","Voltage - Forward (Vf) (Max) @ If":"1 V @ 40 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.0300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8f6cd2d3ea2609775832c074f4cfd4da.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does BAS40B5000 have AEC-Q101 automotive certification?","answer":"Yes, the BAS40B5000 is part of Infineon's Automotive series and carries AEC-Q101 qualification, making it suitable for automotive applications that require device-level reliability certification."},{"question":"What is the BAS40B5000 diode used for?","answer":"It is a small-signal Schottky diode used for low-voltage clamping, flyback catch, reverse-polarity protection, and signal OR-ing in automotive and industrial circuits where the 40 V, 120 mA rating fits. Its AEC-Q101 qualification also makes it a candidate for ECU and sensor interface designs."},{"question":"Is BAS40B5000 equivalent to BAT54?","answer":"The BAS40 and BAT54 families are both small-signal Schottky diodes in SOT-23 packages with similar voltage and current ratings (typically 30 V to 40 V, 200 mA). The BAS40B5000 is pin-compatible with the BAT54 series in the same SOT-23 footprint. The key difference is AEC-Q101 qualification: this BAS40 variant is automotive-qualified, while many BAT54 variants are commercial grade. If your BOM requires AEC-Q101, the BAS40B5000 is the correct choice over a non-qualified BAT54."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/BAS40B5000","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/BAS40B5000 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}}