{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFL4105TRPBF","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFL4105TRPBF","canonicalUrl":"https://icboms.com/infineon/IRFL4105TRPBF","factsUrl":"https://icboms.com/api/mcp/products/IRFL4105TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"IRFL4105TRPBF, HEXFET® series, N-Channel MOSFET, 55V Vdss, 3.7A Id, 45mOhm Rds(on) @ 10V, SOT-223, -55°C to 150°C.","salesMarkdown":"## 55 V, 3.7 A N-channel in a SOT-223 — what this part is for The IRFL4105TRPBF is an N-channel enhancement-mode MOSFET from the HEXFET series, rated for 55 V drain-to-source and 3.7 A continuous drain current at 25°C. It comes in a surface-mount SOT-223 package (TO-261-4), which keeps the board footprint small for low-to-moderate power switching. The 45 mOhm maximum on-resistance at 10 V gate drive is the headline number for conduction loss — at 3.7 A that's about half a watt of dissipation, within the 1 W package limit. That's the standard 10 V drive level for logic-level gate thresholds — the part's Vgs(th) max is 4 V at 250 µA, so 10 V gives you a solid overdrive. Input capacitance is 660 pF at 25 V Vds, which is low enough that a microcontroller GPIO through a series resistor can drive it for low-frequency switching, though a dedicated driver cleans up the edges for higher-frequency PWM. The 1 W power dissipation at 25°C ambient is the package limit in free air; derating is needed above that. In a forced-air or heatsinked layout, the SOT-223 can handle more, but the 1 W number is the conservative design-in figure. ROHS3 compliant, no lead or restricted substances. No last-time-buy or end-of-life notices are in the record. The part is ROHS3 compliant.","metaTitle":"IRFL4105TRPBF N-Channel MOSFET, 55V 3.7A SOT-223","metaDescription":"IRFL4105TRPBF HEXFET N-channel MOSFET, 55V drain, 3.7A continuous, 45 mOhm Rds(on) at 10V. SOT-223 surface mount. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"HEXFET®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Series":"HEXFET®","Package":"Tape & Reel (TR); Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±20V","Technology":"MOSFET (Metal Oxide)","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4V @ 250µA","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"45mOhm @ 3.7A, 10V","Power Dissipation (Max)":"1W (Ta)","Supplier Device Package":"SOT-223","Gate Charge (Qg) (Max) @ Vgs":"35 nC @ 10 V","Drain to Source Voltage (Vdss)":"55 V","Input Capacitance (Ciss) (Max) @ Vds":"660 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"3.7A (Ta)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.93","priceTiers":[{"qty":1,"price":"$1.10000","currency":"USD"},{"qty":10,"price":"$0.96700","currency":"USD"},{"qty":100,"price":"$0.74170","currency":"USD"},{"qty":500,"price":"$0.58632","currency":"USD"},{"qty":1000,"price":"$0.46906","currency":"USD"},{"qty":2500,"price":"$0.42752","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b9d24e84a07227a5bfbc91c1b6221bfa.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IRFL4105TRPBF/alternatives.json"},"ai":{"faq":[{"question":"Is IRFL4105TRPBF obsolete or active?","answer":"It is Active in production — no discontinuation or last-time-buy has been announced."},{"question":"What is the RDS(on) of IRFL4105TRPBF at 10V?","answer":"45 mOhm maximum at 10 V gate drive with 3.7 A drain current."},{"question":"What is the maximum drain current and voltage rating of IRFL4105TRPBF?","answer":"55 V drain-to-source voltage, 3.7 A continuous drain current at 25°C."},{"question":"Is IRFL4105TRPBF RoHS compliant?","answer":"Yes, it is ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFL4105TRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFL4105TRPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:39:33.080Z","lastPublished":"2026-07-16T10:39:33.080Z","indexable":true}}