{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BAT165-G3/H","brand":"Vishay","brandSlug":"vishay","productSlug":"BAT165-G3-H","canonicalUrl":"https://icboms.com/vishay/BAT165-G3-H","factsUrl":"https://icboms.com/api/mcp/products/BAT165-G3%2FH","rawCanonicalId":null},"summary":{"shortDescription":"Vishay BAT165-G3/H Schottky diode, 40 V reverse voltage, 500 mA average rectified current, 540 mV forward drop at 250 mA, fast recovery ≤ 500 ns, DO-219AC (microSMF) surface mount package.","salesMarkdown":"## Schottky rectifier for low-power rail protection The Vishay BAT165-G3/H is a Schottky barrier rectifier rated for 40 V reverse voltage and 500 mA average rectified current. It targets low-voltage rail protection, polarity protection, and freewheeling diode roles in DC-DC converters and portable equipment where forward drop matters more than breakdown margin. ## Forward drop and leakage — the efficiency pair Forward voltage is specified at 540 mV maximum at 250 mA forward current. That is the conduction loss floor for the typical load point — a designer sizing for 500 mA peak sees roughly 270 mW dissipation at full load before derating for ambient temperature. Reverse leakage is 8 µA at 40 V reverse bias. In a battery-powered circuit drawing microamps in sleep, that leakage current can dominate the off-state budget. The 150°C junction temperature rating gives headroom for reflow and moderate self-heating, but leakage rises exponentially with temperature — expect higher standby draw at elevated ambient. ## Switching speed and package fit Recovery time is listed as fast recovery ≤ 500 ns at > 200 mA forward current. That is adequate for line-frequency rectification and low-frequency switching up to tens of kilohertz, but not for high-speed synchronous rectification in a 500 kHz+ converter — a faster Schottky with lower junction capacitance would be needed there. The DO-219AC (microSMF) package is a small surface-mount SOD-123FL-like outline. It fits reflow assembly with standard pick-and-place and requires no thermal pad — the junction-to-ambient thermal resistance is set by the copper pad area on the PCB. The 8.4 pF capacitance at 10 V is low enough to avoid signal degradation in protection clamping roles. ## Active production — no LTB concern Product status is listed as Active.","metaTitle":"BAT165-G3/H Schottky Diode, 40V 500mA, DO-219AC","metaDescription":"BAT165-G3/H Schottky diode, 40V reverse voltage, 500mA average rectified current, 540mV forward drop at 250mA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":[],"specifications":{"Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"DO-219AC","lifecycle_stage":"eol_hot","Capacitance @ Vr, F":"8.4pF @ 10V, 1MHz","Supplier Device Package":"DO-219AC (microSMF)","Current - Reverse Leakage @ Vr":"8 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Current - Average Rectified (Io)":"500mA","Operating Temperature - Junction":"150°C","Voltage - Forward (Vf) (Max) @ If":"540 mV @ 250 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.40000","currency":"USD"},{"qty":10,"price":"$0.32500","currency":"USD"},{"qty":100,"price":"$0.17220","currency":"USD"},{"qty":500,"price":"$0.11328","currency":"USD"},{"qty":1000,"price":"$0.07704","currency":"USD"},{"qty":2000,"price":"$0.06949","currency":"USD"},{"qty":4500,"price":"$0.06948","currency":"USD"},{"qty":9000,"price":"$0.06042","currency":"USD"},{"qty":13500,"price":"$0.05136","currency":"USD"},{"qty":31500,"price":"$0.04834","currency":"USD"},{"qty":112500,"price":"$0.04702","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/51e96287a8e28d74f8b529ff42d141fb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reverse leakage current of BAT165-G3/H?","answer":"Reverse leakage current is 8 µA at 40 V reverse voltage. This is specified at room temperature; leakage increases with junction temperature, so expect higher off-state current in elevated ambient conditions."},{"question":"What package type does BAT165-G3/H use?","answer":"The BAT165-G3/H is supplied in a DO-219AC surface-mount package, also referred to as microSMF. It is a small SOD-123FL-like outline suitable for reflow assembly with standard pick-and-place equipment."},{"question":"Can I replace BAT165-G3/H with BAT54?","answer":"The BAT54 is a different Schottky diode with a 30 V reverse rating and 200 mA average current, versus the BAT165's 40 V and 500 mA. The BAT54 has lower current capacity and a different package (SOT-23). They are not pin-compatible or direct replacements — the BAT165 is a larger part for higher current and voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/BAT165-G3-H","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/BAT165-G3-H when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}