{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFP4321PBF","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFP4321PBF","canonicalUrl":"https://icboms.com/infineon/IRFP4321PBF","factsUrl":"https://icboms.com/api/mcp/products/IRFP4321PBF","rawCanonicalId":null},"summary":{"shortDescription":"Infineon HEXFET IRFP4321PBF, N-Channel MOSFET, 150 V Vdss, 78 A Id, 15.5 mOhm Rds(on) at 33 A, 10 V, 110 nC Qg, TO-247AC, -55°C to 175°C","salesMarkdown":"## 150 V, 78 A HEXFET — the conduction-loss benchmark The IRFP4321PBF is an N-channel HEXFET power MOSFET from Infineon's established HEXFET series, housed in a through-hole TO-247AC package. It is designed for high-current switching applications where low on-resistance and ruggedness matter — think motor drives, DC-DC converters, battery isolation switches, and industrial power supplies. ## Gate charge and switching speed — what 110 nC means for the driver Total gate charge is 110 nC at a 10 V gate drive. Input capacitance is 4460 pF at 25 V Vds. ## Thermal budget and mounting — the TO-247AC reality Maximum power dissipation is 310 W at the case temperature. That number assumes an ideal heatsink at 25°C case — real-world derating is governed by the junction-to-case thermal resistance implicit in that figure. The through-hole TO-247AC package requires a heatsink with a mounting hole for the M3 screw through the tab.","metaTitle":"IRFP4321PBF HEXFET N-Channel MOSFET, 150V 78A TO-247AC","metaDescription":"IRFP4321PBF N-channel HEXFET MOSFET: 150V Vdss, 78A Id, 15.5mOhm Rds(on) at 33A, 10V. Active lifecycle, TO-247AC.","metaKeywords":null},"attributes":{"series":"HEXFET®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Series":"HEXFET®","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±30V","Technology":"MOSFET (Metal Oxide)","Mounting Type":"Through Hole","Package / Case":"TO-247-3","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Operating Temperature":"-55°C ~ 175°C (TJ)","Rds On (Max) @ Id, Vgs":"15.5mOhm @ 33A, 10V","Power Dissipation (Max)":"310W (Tc)","Supplier Device Package":"TO-247AC","Gate Charge (Qg) (Max) @ Vgs":"110 nC @ 10 V","Drain to Source Voltage (Vdss)":"150 V","Input Capacitance (Ciss) (Max) @ Vds":"4460 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"78A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.83","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.83000","currency":"USD"},{"qty":10,"price":"$4.05900","currency":"USD"},{"qty":100,"price":"$3.28400","currency":"USD"},{"qty":500,"price":"$2.91914","currency":"USD"},{"qty":1000,"price":"$2.49952","currency":"USD"},{"qty":2000,"price":"$2.35356","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/bc8482b3cd6f5da86e23fd8c96ab268d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is IRFP4321PBF obsolete?","answer":"No. No discontinuation notice or last-time-buy date has been issued."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFP4321PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFP4321PBF 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}}