{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAT54KFILM","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BAT54KFILM","canonicalUrl":"https://icboms.com/stmicroelectronics/BAT54KFILM","factsUrl":"https://icboms.com/api/mcp/products/BAT54KFILM","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BAT54KFILM, Schottky diode, 40 V reverse, 300 mA forward, 5 ns reverse recovery, SOD-523 package, -40°C to 150°C junction temperature.","salesMarkdown":"## Schottky 40V, 300mA — the rail-protection workhorse The STMicroelectronics BAT54KFILM is a Schottky barrier rectifier rated for 40 V reverse voltage and 300 mA average forward current, housed in the compact SOD-523 surface-mount package. ## 5 ns reverse recovery — fast enough for line-frequency rectification Junction capacitance measures 10 pF at 1 V reverse bias and 1 MHz, low enough to avoid signal degradation in low-speed clamping or protection circuits. ## SOD-523 footprint — the smallest BAT54 variant The SOD-523 body (1.6 x 0.8 mm nominal) is the smallest package in the BAT54 family, about half the board area of the SOT-23 version. The land pattern must match the SOD-523 pad geometry — a SOT-23 footprint will not fit. Reverse leakage is specified at 1 µA maximum at 30 V reverse bias and 25°C junction; leakage doubles roughly every 10°C rise, so at 125°C junction the leakage current can exceed the forward conduction in a lightly loaded circuit.","metaTitle":"STMicro BAT54KFILM Schottky Diode, 40V 300mA SOD-523","metaDescription":"Schottky rectifier rated 40V reverse, 300mA forward, 5 ns trr. SOD-523 package. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"SC-79, SOD-523","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"BAT54","Capacitance @ Vr, F":"10pF @ 1V, 1MHz","Supplier Device Package":"SOD-523","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":"$0.4900","priceTiers":[{"qty":1,"price":"$0.49000","currency":"USD"},{"qty":10,"price":"$0.36600","currency":"USD"},{"qty":100,"price":"$0.20740","currency":"USD"},{"qty":500,"price":"$0.13738","currency":"USD"},{"qty":1000,"price":"$0.10532","currency":"USD"},{"qty":3000,"price":"$0.09158","currency":"USD"},{"qty":6000,"price":"$0.08243","currency":"USD"},{"qty":15000,"price":"$0.07560","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a45db93da6c352b18b3e390448765d10.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BAT54KFILM/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to BAT54KFILM?","answer":"The BAT54KFILM is the SOD-523 variant of the BAT54 family. The SOT-23 packaged BAT54 (e.g., BAT54, BAT54S) is not pin-compatible — the SOD-523 has two terminals (anode and cathode) with a different pad layout. Within the SOD-523 footprint, the BAT54KFILM is the standard 40 V / 300 mA Schottky; other BAT54-family parts in SOD-523 (e.g., BAT54AWFILM, BAT54CWFILM) add a second diode in common-cathode or series configuration but share the same two-terminal footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BAT54KFILM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BAT54KFILM 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}}