{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAT54CWFILMY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BAT54CWFILMY","canonicalUrl":"https://icboms.com/stmicroelectronics/BAT54CWFILMY","factsUrl":"https://icboms.com/api/mcp/products/BAT54CWFILMY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BAT54CWFILMY, Q series, Schottky diode array, 1 pair common cathode, 40 V DC reverse, 300 mA average rectified per diode, 5 ns reverse recovery, AEC-Q101, SOT-323, surface mount.","salesMarkdown":"## Dual Schottky in a SOT-323 for automotive and industrial clamping The STMicroelectronics BAT54CWFILMY packs two Schottky barrier diodes in a common-cathode configuration inside a single SOT-323 package. The 5 ns reverse recovery time is the key switching-speed spec. In a boost converter or a flyback snubber, that fast trr means the diode stops conducting almost immediately when the voltage reverses, minimising the reverse-recovery charge that would otherwise cause switching loss and ringing. Forward voltage is specified at 900 mV maximum at 100 mA — typical Schottky numbers, but the real thermal headroom comes from the 150°C junction rating. In a cramped ECU enclosure where ambient can hit 105°C, that margin matters for long-term reliability. ## Common-cathode pair — where it saves board space The 1 Pair Common Cathode configuration means the cathodes of both diodes are tied together internally. This is the standard topology for a dual Schottky used as a centre-tapped rectifier in a push-pull secondary, or as a single-package OR-ing diode pair where two independent anodes share a common output rail. One SOT-323 replaces two discrete SOD-123 diodes, cutting placement cost and board area roughly in half. ROHS3 compliant.","metaTitle":"STMicro BAT54CWFILMY Schottky Diode, 40V 300mA, AEC-Q101","metaDescription":"STMicroelectronics BAT54CWFILMY dual common-cathode Schottky diode, 40V Vr, 300mA Io, 5ns trr, AEC-Q101 qualified. SOT-323.","metaKeywords":null},"attributes":{"series":"Q","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Grade":"Automotive","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"Q","Package":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Schottky","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"SC-70, SOT-323","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"BAT54","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"SOT-323","Reverse Recovery Time (trr)":"5 ns","Current - Reverse Leakage @ Vr":"1 µA @ 30 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Operating Temperature - Junction":"-40°C ~ 150°C","Voltage - Forward (Vf) (Max) @ If":"900 mV @ 100 mA","Current - Average Rectified (Io) (per Diode)":"300mA (DC)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4800","priceTiers":[{"qty":1,"price":"$0.48000","currency":"USD"},{"qty":10,"price":"$0.34400","currency":"USD"},{"qty":100,"price":"$0.17340","currency":"USD"},{"qty":500,"price":"$0.15366","currency":"USD"},{"qty":1000,"price":"$0.11958","currency":"USD"},{"qty":3000,"price":"$0.10703","currency":"USD"},{"qty":6000,"price":"$0.10464","currency":"USD"},{"qty":9000,"price":"$0.09268","currency":"USD"},{"qty":30000,"price":"$0.09148","currency":"USD"},{"qty":75000,"price":"$0.07773","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1b3bae8bb81057a6b6d2be488c605aa3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BAT54CWFILMY/alternatives.json"},"ai":{"faq":[{"question":"Is BAT54CWFILMY AEC-Q101 qualified?","answer":"Yes, the BAT54CWFILMY is AEC-Q101 qualified, which is the automotive stress-test qualification for discrete semiconductors. That means it has passed the full suite of reliability tests — HTRB, H3TRB, temperature cycling, and autoclave — required for use in automotive ECUs and other safety-related systems."},{"question":"Can I use BAT54CWFILMY as a replacement for BAT54C?","answer":"The BAT54CWFILMY is functionally the same dual common-cathode Schottky as the standard BAT54C, but with the key difference of AEC-Q101 automotive qualification. Electrically the ratings match — 40 V Vr, 300 mA Io, 5 ns trr — so in a non-automotive design the BAT54C is a direct drop-in. For an automotive BOM that requires the AEC-Q101 cert, the FILMY suffix is the correct choice."},{"question":"How do I get current pricing and availability for BAT54CWFILMY?","answer":"Submit an RFQ with your target quantity and we will source the BAT54CWFILMY against your BOM line — no minimums, no commitment to order until you see the quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BAT54CWFILMY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BAT54CWFILMY 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}}