{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFI4321PBF","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFI4321PBF","canonicalUrl":"https://icboms.com/infineon/IRFI4321PBF","factsUrl":"https://icboms.com/api/mcp/products/IRFI4321PBF","rawCanonicalId":null},"summary":{"shortDescription":"IRFI4321PBF, HEXFET® N-Channel MOSFET, 150 V Vdss, 34 A Id, 16 mOhm Rds(on) at 10 V, 110 nC Qg, TO-220-3 Full Pack, -55°C to 150°C.","salesMarkdown":"## 150 V, 34 A, 16 mOhm — what this N-channel HEXFET delivers Gate charge totals 110 nC at 10 V, which sets the switching-speed ceiling: expect clean hard-switching up to the low tens of kHz before gate-drive current becomes a design constraint. Input capacitance is 4440 pF at 50 V drain-source. ## Full-Pak package — no insulator needed in the field The TO-220 Full-Pak (TO-220AB Full-Pak) isolates the metal tab electrically, so you can bolt it directly to a heatsink without a mica or silicone-pad insulator. That saves a part and a step on the assembly line — and if you are swapping this in the field, it is one less thing to lose. Through-hole mounting (3-lead TO-220) is mechanically robust for high-vibration environments like motor drives, industrial power supplies, and automotive under-hood modules. The 46 W power dissipation at case temperature gives the thermal budget for a modest heatsink in still air. ## Temperature range and production status The 150°C ceiling also provides headroom for high-current operation with a heatsink.","metaTitle":"IRFI4321PBF HEXFET N-Channel 150V 34A MOSFET","metaDescription":"IRFI4321PBF HEXFET N-Channel MOSFET, 150V Vdss, 34A Id, 16mOhm Rds(on) at 10V. Active production, ROHS3 compliant, -55°C to 150°C.","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-220-3 Full Pack","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"5V @ 250µA","Operating Temperature":"-55°C ~ 150°C (TJ)","Rds On (Max) @ Id, Vgs":"16mOhm @ 20A, 10V","Power Dissipation (Max)":"46W (Tc)","Supplier Device Package":"TO-220AB Full-Pak","Gate Charge (Qg) (Max) @ Vgs":"110 nC @ 10 V","Drain to Source Voltage (Vdss)":"150 V","Input Capacitance (Ciss) (Max) @ Vds":"4440 pF @ 50 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"34A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.47","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.95000","currency":"USD"},{"qty":10,"price":"$3.54900","currency":"USD"},{"qty":100,"price":"$2.90740","currency":"USD"},{"qty":500,"price":"$2.47502","currency":"USD"},{"qty":1000,"price":"$2.08736","currency":"USD"},{"qty":2000,"price":"$1.98300","currency":"USD"},{"qty":5000,"price":"$1.94475","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1f630b27eb3702d2837db59337914523.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the Rds(on) of IRFI4321PBF?","answer":"This is the figure to use for worst-case conduction-loss calculations in your thermal model."},{"question":"Is IRFI4321PBF RoHS compliant?","answer":"Yes, the IRFI4321PBF is ROHS3 compliant, meaning it meets the EU RoHS directive for lead-free and restricted-substance limits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFI4321PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFI4321PBF 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}}