{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAT43","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BAT43","canonicalUrl":"https://icboms.com/stmicroelectronics/BAT43","factsUrl":"https://icboms.com/api/mcp/products/BAT43","rawCanonicalId":null},"summary":{"shortDescription":"Schottky diode, 30 V DC reverse, 200 mA average rectified, 5 ns reverse recovery time, DO-204AH (DO-35) axial-lead package, through-hole mount.","salesMarkdown":"## 30 V, 200 mA Schottky for low-voltage rail clamping and fast rectification The BAT43 is a small-signal Schottky diode rated for 30 V DC reverse voltage and 200 mA average rectified current — a common choice for low-voltage rail protection, polarity protection, and high-frequency rectification in battery-powered or signal-level circuits. Its 5 ns reverse recovery time (trr) keeps switching losses low in DC-DC converter snubbers and flyback catch-diode positions, where a slower PN-junction diode would ring or overheat. The DO-35 axial-lead package (DO-204AH) suits through-hole assembly, breadboard prototyping, and hand-solder rework — a footprint that mates with legacy board layouts and high-reliability point-to-point wiring. Reverse leakage is 500 nA at 25 V — low enough to avoid draining a battery in a reverse-blocking or OR-ing application, but note that leakage doubles with every 10 °C rise above 25 °C junction temperature. Capacitance is 7 pF at 1 V reverse bias, 1 MHz — a light capacitive load for a high-speed signal line or RF detector, but not negligible at UHF frequencies where a few pF shifts the impedance match.","metaTitle":"BAT43 Schottky Diode, 30V 200mA DO-35, 5ns trr","metaDescription":"Schottky diode, 30V reverse, 200mA average rectified, 5ns trr, DO-35 axial. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Speed":"Small Signal =< 200mA (Io), Any Speed","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Through Hole","Package / Case":"DO-204AH, DO-35, Axial","lifecycle_stage":"eol_hot","Capacitance @ Vr, F":"7pF @ 1V, 1MHz","Supplier Device Package":"DO-35","Reverse Recovery Time (trr)":"5 ns","Current - Reverse Leakage @ Vr":"500 nA @ 25 V","Voltage - DC Reverse (Vr) (Max)":"30 V","Current - Average Rectified (Io)":"200mA","Operating Temperature - Junction":"-65°C ~ 125°C","Voltage - Forward (Vf) (Max) @ If":"1 V @ 200 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.42","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.42000","currency":"USD"},{"qty":10,"price":"$0.33600","currency":"USD"},{"qty":100,"price":"$0.22910","currency":"USD"},{"qty":500,"price":"$0.17180","currency":"USD"},{"qty":1000,"price":"$0.12885","currency":"USD"},{"qty":2000,"price":"$0.11811","currency":"USD"},{"qty":4000,"price":"$0.11811","currency":"USD"},{"qty":8000,"price":"$0.11708","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f593dfae59c018a9cb22571452b17f76.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the specifications of BAT43?","answer":"Schottky diode, 30 V DC reverse, 200 mA average rectified, 5 ns reverse recovery time, 500 nA leakage at 25 V, 7 pF capacitance at 1 V, DO-35 axial package, junction temperature range -65 °C to 125 °C."},{"question":"Can I replace BAT43 with 1N5817?","answer":"The 1N5817 is a 1 A, 20 V Schottky in a DO-41 package — higher current rating but lower voltage and a larger footprint. It is not a pin-compatible drop-in for the BAT43 in a 200 mA, 30 V, DO-35 position."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BAT43","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BAT43 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T16:44:09.958Z","lastPublished":"2026-07-16T16:44:09.958Z","indexable":true}}