{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRF7946TRPBF","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRF7946TRPBF","canonicalUrl":"https://icboms.com/infineon/IRF7946TRPBF","factsUrl":"https://icboms.com/api/mcp/products/IRF7946TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Infineon HEXFET®, StrongIRFET™ IRF7946TRPBF, N-Channel MOSFET, 40 V Vdss, 90 A continuous drain, 1.4 mOhm Rds(on) at 10 V, 212 nC gate charge, DirectFET™ Isometric MX package, -55°C to 150°C junction temperature.","salesMarkdown":"## 40 V, 90 A N-channel in a DirectFET can It comes in the DirectFET Isometric MX package, a low-profile, solderable can that provides low inductance and direct thermal path to the PCB. ## Conduction loss and gate drive budget At 90 A, the I²R loss is about 11.3 W, which must be removed through the DirectFET's solderable pad to the board copper. The 212 nC total gate charge at 10 V means the gate driver needs to source and sink a significant charge per switching cycle — a 1 A driver at 100 kHz would spend about 21% of the period charging the gate, so a higher-current driver or lower switching frequency may be needed. ## Thermal and voltage headroom for the rail The 40 V Vdss rating provides headroom for a 12 V or 24 V bus with transients, but not for a 48 V telecom rail. ## Package and PCB layout The DirectFET Isometric MX package is a surface-mount can with a large solderable drain pad on the bottom and separate source and gate pads. The 6852 pF input capacitance at 25 V Vds means the gate driver sees a capacitive load that affects switching edge rates and may require a gate resistor to control ringing.","metaTitle":"IRF7946TRPBF MOSFET N-CH 40V 90A DirectFET MX, 1.4 mOhm","metaDescription":"IRF7946TRPBF N-channel MOSFET, 40V Vdss, 90A continuous drain, 1.4 mOhm Rds(on) at 10V. DirectFET Isometric MX package. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"HEXFET®, StrongIRFET™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Series":"HEXFET®, StrongIRFET™","Package":"Tape & Reel (TR); Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±20V","Technology":"MOSFET (Metal Oxide)","Mounting Type":"Surface Mount","Package / Case":"DirectFET™ Isometric MX","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"3.9V @ 150µA","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"1.4mOhm @ 90A, 10V","Power Dissipation (Max)":"96W (Tc)","Supplier Device Package":"DIRECTFET™ MX","Gate Charge (Qg) (Max) @ Vgs":"212 nC @ 10 V","Drain to Source Voltage (Vdss)":"40 V","Input Capacitance (Ciss) (Max) @ Vds":"6852 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"6V, 10V","Current - Continuous Drain (Id) @ 25°C":"90A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.49","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.49000","currency":"USD"},{"qty":10,"price":"$2.06600","currency":"USD"},{"qty":100,"price":"$1.64430","currency":"USD"},{"qty":500,"price":"$1.39136","currency":"USD"},{"qty":1000,"price":"$1.18055","currency":"USD"},{"qty":2000,"price":"$1.12152","currency":"USD"},{"qty":4800,"price":"$1.07936","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97c3cd8413d29587cb0fdee8590bab2d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the Rds(on) of IRF7946TRPBF?","answer":"This is the value used for conduction loss calculations at rated current."},{"question":"What package does IRF7946TRPBF use?","answer":"It uses the DirectFET Isometric MX package, a surface-mount can-style package with a large solderable drain pad."},{"question":"Is IRF7946TRPBF RoHS compliant?","answer":"Yes, it is ROHS3 compliant per the listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRF7946TRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRF7946TRPBF 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}}