{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAT54SFILMY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BAT54SFILMY","canonicalUrl":"https://icboms.com/stmicroelectronics/BAT54SFILMY","factsUrl":"https://icboms.com/api/mcp/products/BAT54SFILMY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BAT54SFILMY, Q Automotive series Schottky diode, 40 V reverse voltage, 300 mA average rectified current per diode, 5 ns reverse recovery time, 1 µA leakage at 30 V, 900 mV forward drop at 100 mA, series pair configuration, SOT-23 package, surface mount, -40°C to 150°C junction temperature.","salesMarkdown":"## What this Schottky pair does on the board The STMicroelectronics BAT54SFILMY is an automotive-grade Schottky diode in a series-pair configuration, housed in a SOT-23 surface-mount package. ## 5 ns reverse recovery — what it buys you A Schottky's 5 ns trr is effectively instantaneous for most switching frequencies below a few megahertz. In a boost or flyback converter, that means negligible reverse-recovery loss in the rectifier stage — the scorch mark that kills a slow silicon diode at 100 kHz won't show up here. For signal-level clamping or OR-ing, the 5 ns recovery keeps the waveform clean through fast edges. ## Series pair — why two diodes in one package The two Schottky diodes are connected anode-to-cathode in series inside a single SOT-23. That saves board space and cuts pick-and-place cost compared to two separate SOD-123 or SOD-323 parts. Typical uses: a center-tapped winding in a push-pull converter, a voltage-clamp network where the series pair handles bidirectional blocking, or a current-steering OR-ing circuit. ## Leakage and forward drop at temperature Reverse leakage is specified at 1 µA max at 30 V, typical for a 40 V Schottky. Forward drop hits 900 mV maximum at 100 mA — higher than a low-Vf Schottky but acceptable for the current range. At 150°C junction, leakage will multiply (Schottky physics), so budget extra margin if the diode sits near a hot regulator or power stage. ## Active lifecycle — no last-time-buy scramble No EOL notice, no LTB window to chase.","metaTitle":"STMicroelectronics BAT54SFILMY Schottky Diode, 40 V, 300 mA","metaDescription":"STMicroelectronics BAT54SFILMY automotive Schottky diode, 40 V, 300 mA, 5 ns trr, series pair in SOT-23. Active lifecycle, AEC-Q qualified.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"Q Automotive","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":"Active","lifecycle_stage":"eol_hot","Base Product Number":"BAT54","Diode Configuration":"1 Pair Series Connection","Supplier Device Package":"SOT-23","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":"$0.4400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1b3bae8bb81057a6b6d2be488c605aa3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BAT54SFILMY/alternatives.json"},"ai":{"faq":[{"question":"Is BAT54SFILMY automotive qualified?","answer":"Yes, the Q Automotive series designation means this part is qualified for automotive applications."},{"question":"What is the reverse recovery time of BAT54SFILMY?","answer":"The reverse recovery time (trr) is 5 ns, typical for a Schottky diode. That is fast enough for switching supplies and signal clamping up to several megahertz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BAT54SFILMY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BAT54SFILMY 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}}