{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFZ44ZSTRRPBF","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFZ44ZSTRRPBF","canonicalUrl":"https://icboms.com/infineon/IRFZ44ZSTRRPBF","factsUrl":"https://icboms.com/api/mcp/products/IRFZ44ZSTRRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Infineon IRFZ44ZSTRRPBF, HEXFET® N-Channel MOSFET, 55 V Vdss, 51 A Id, 13.9 mOhm Rds(on) at 10 V, D2PAK (TO-263), -55°C to 175°C junction temperature.","salesMarkdown":"It is built with standard MOSFET (Metal Oxide) technology and packaged in a surface-mount D2PAK (TO-263-3) with an exposed tab for thermal management. ## 13.9 mOhm on-resistance — what it drives for the BOM The maximum on-resistance of 13.9 mOhm, specified at a drain current of 31 A and a gate drive of 10 V, determines the conduction losses that set the thermal budget. At 31 A, the I²R loss reaches roughly 13.4 W, which must be dissipated through the D2PAK tab and PCB copper. ## NRND — no longer recommended for new designs This means Infineon has flagged it for eventual discontinuation, though it remains available in the supply channel for existing production runs and service repairs. For new designs, evaluate a current-production N-channel MOSFET in the same voltage class and package. The input capacitance of 1420 pF at a drain-source voltage of 25 V is typical for a 55 V class device in this current range and influences the gate drive design.","metaTitle":"IRFZ44ZSTRRPBF N-Channel MOSFET, 55V 51A HEXFET, D2PAK","metaDescription":"IRFZ44ZSTRRPBF N-channel HEXFET MOSFET: 55V Vdss, 51A continuous drain, 13.9mOhm Rds(on) at 10V. NRND status. D2PAK surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Infineon Technologies","Series":"HEXFET®","Package":"Tape & Reel (TR); Cut Tape (CT)","FET Type":"N-Channel","Vgs (Max)":"±20V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","Product Status":"Active","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4V @ 250µA","Base Product Number":"IRFZ44","Operating Temperature":"-55°C~175°C(TJ)","Rds On (Max) @ Id, Vgs":"13.9mOhm @ 31A, 10V","Power Dissipation (Max)":"80W (Tc)","Supplier Device Package":"D2PAK","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":"$1.6700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9d45e4085e3e9dd22dde0bdbb7938cbb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IRFZ44ZSTRRPBF/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for IRFZ44ZSTRRPBF?","answer":"For new designs, choose a current-production 55 V N-channel MOSFET in a D2PAK package with comparable on-resistance and current rating."},{"question":"What is the Rds(on) of IRFZ44ZSTRRPBF?","answer":"The maximum on-resistance is 13.9 mOhm, measured at a drain current of 31 A and a gate-to-source voltage of 10 V."},{"question":"Is IRFZ44ZSTRRPBF obsolete?","answer":"It is not yet fully discontinued but is no longer recommended for new product designs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFZ44ZSTRRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFZ44ZSTRRPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:58:59.321Z","lastPublished":"2026-07-16T14:58:59.321Z","indexable":true}}