{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFZ44ZL","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFZ44ZL","canonicalUrl":"https://icboms.com/infineon/IRFZ44ZL","factsUrl":"https://icboms.com/api/mcp/products/IRFZ44ZL","rawCanonicalId":null},"summary":{"shortDescription":"Infineon HEXFET® IRFZ44ZL, N-Channel MOSFET, 55 V Vdss, 51 A continuous drain, 13.9 mOhm Rds(on) max at 10 V, TO-262-3 (I²Pak) through-hole, -55 to 175 °C junction.","salesMarkdown":"## What this 55 V, 51 A N-channel HEXFET is for Typical applications include high-current switching in DC-DC converters, motor drives, battery protection circuits, and automotive under-hood loads where the wide temperature range and low Rds(on) reduce conduction losses. The TO-262 package (I²Pak variant with long leads) is a through-hole part that sits in the same footprint as a standard TO-220 but with a longer tab for heatsink mounting. ## Obsolete — sourcing path for the BOM line If the design can accept a surface-mount alternative or a different gate-charge profile, a parametric search against the 55 V / 51 A / 13.9 mOhm / TO-262 footprint will identify candidates, but no single drop-in replacement is documented by the manufacturer.","metaTitle":"IRFZ44ZL HEXFET N-Channel MOSFET, 55V 51A TO-262","metaDescription":"IRFZ44ZL N-channel HEXFET MOSFET: 55 V Vdss, 51 A continuous drain, 13.9 mOhm Rds(on) at 10 V. TO-262 through-hole.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"HEXFET®","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±20V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-262-3 Long Leads, I²Pak, TO-262AA","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4V @ 250µA","Operating Temperature":"-55°C ~ 175°C (TJ)","Rds On (Max) @ Id, Vgs":"13.9mOhm @ 31A, 10V","Power Dissipation (Max)":"80W (Tc)","Supplier Device Package":"TO-262","Gate Charge (Qg) (Max) @ Vgs":"43 nC @ 10 V","Drain to Source Voltage (Vdss)":"55 V","Input Capacitance (Ciss) (Max) @ Vds":"1420 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"51A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9d45e4085e3e9dd22dde0bdbb7938cbb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IRFZ44ZL/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for IRFZ44ZL?","answer":"Infineon has not published an official direct replacement order code for the IRFZ44ZL. A functional equivalent would need to match the 55 V Vdss, 51 A continuous drain, 13.9 mOhm Rds(on) max at 10 V, and the through-hole TO-262 package. Without a manufacturer-designated successor, the best approach is a parametric search against those four constraints or to source the original part through independent distribution against an RFQ."},{"question":"Where can I buy the IRFZ44ZL?","answer":"Submit an RFQ for a firm quote and lead-time estimate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFZ44ZL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFZ44ZL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:11:57.364Z","lastPublished":"2026-07-16T15:11:57.364Z","indexable":true}}