{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAT54WFILM","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BAT54WFILM","canonicalUrl":"https://icboms.com/stmicroelectronics/BAT54WFILM","factsUrl":"https://icboms.com/api/mcp/products/BAT54WFILM","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BAT54WFILM Schottky diode, 300 mA average rectified current, 40 V DC reverse voltage, 5 ns reverse recovery time, SOT-323 surface-mount package.","salesMarkdown":"The STMicroelectronics BAT54WFILM is a Schottky barrier diode rated for 300 mA average rectified current and a 40 V DC reverse voltage. It switches fast — 5 ns reverse recovery time — and drops 900 mV at 100 mA forward current. Reverse leakage is 1 µA at 30 V. The device comes in an SOT-323 surface-mount package, which is the SC-70 variant footprint. This is a small-signal Schottky suited for low-voltage rectification, freewheeling, and clamping in compact designs where board area is tight. The BAT54WFILM is marked obsolete by STMicroelectronics. The last-time-buy window has closed. Any stock still in the channel is residual inventory — once it is gone, it is gone. ## 5 ns reverse recovery — why it matters A 5 ns trr is fast for a 300 mA Schottky. In a high-frequency switching supply or a snubber clamp, that speed means the diode stops conducting almost immediately when the voltage reverses, reducing switching losses and ringing. The 10 pF junction capacitance at 1 V also helps keep the switching node clean. If your circuit runs above a few hundred kilohertz, this diode will not be the bottleneck. ## Temperature range and junction limits That is the full operating junction temperature range — not just storage. The device can handle the thermal cycling of outdoor or industrial environments, but the 150°C ceiling means you need to derate the forward current if the ambient is high and the board has poor heat sinking. In a 85°C ambient, the 300 mA rating is still usable with reasonable copper area on the pads.","metaTitle":"STMicro BAT54WFILM Schottky Diode, 300 mA, 40 V, SOT-323","metaDescription":"STMicroelectronics BAT54WFILM Schottky diode, 300 mA average rectified current, 40 V reverse voltage, 5 ns trr in SOT-323.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Schottky","Mounting Type":"Surface Mount","Package / Case":"SC-70, SOT-323","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"BAT54","Capacitance @ Vr, F":"10pF @ 1V, 1MHz","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","Current - Average Rectified (Io)":"300mA","Operating Temperature - Junction":"-40°C ~ 150°C","Voltage - Forward (Vf) (Max) @ If":"900 mV @ 100 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a45db93da6c352b18b3e390448765d10.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BAT54WFILM/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for BAT54WFILM?","answer":"STMicroelectronics does not list a direct successor order code for the BAT54WFILM. A functionally equivalent Schottky in SOT-323 from the same base product family (BAT54) would be the BAT54S or BAT54A variants if your circuit needs dual diodes, but those are also subject to lifecycle status. For a single Schottky in SOT-323, the BAT54W series is the closest parametric match, but verify pinout and electricals against your design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BAT54WFILM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BAT54WFILM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:32:59.488Z","lastPublished":"2026-07-16T14:32:59.488Z","indexable":true}}