{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFZ44ZS","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFZ44ZS","canonicalUrl":"https://icboms.com/infineon/IRFZ44ZS","factsUrl":"https://icboms.com/api/mcp/products/IRFZ44ZS","rawCanonicalId":null},"summary":{"shortDescription":"Infineon HEXFET® IRFZ44ZS, N-Channel MOSFET, 55 V Vdss, 51 A Id, 13.9 mOhm Rds(on) @ 10 V, D2Pak (TO-263), -55°C to 175°C.","salesMarkdown":"The 55 V Vdss rating gives you headroom for 12 V and 24 V systems, including load-dump transients in automotive environments. The 51 A continuous current rating is specified at case temperature 25°C — derate significantly at elevated temperatures; the 80 W power dissipation ceiling (at Tc=25°C) is the real thermal limit in a practical layout. The 13.9 mOhm Rds(on) at 10 V gate drive means conduction losses stay low for a 51 A part, but the gate threshold voltage (max 4 V at 250 µA) requires a full 10 V gate drive to achieve that low resistance — logic-level drive at 5 V will leave you with much higher on-resistance. Gate charge of 43 nC at 10 V is moderate; the driver needs to source that charge quickly for fast switching. ## Lifecycle reality — obsolete, but still sourced For new designs, a replacement should be selected. The D2Pak (TO-263) is a surface-mount power package with three leads and a large metal tab.","metaTitle":"IRFZ44ZS MOSFET, N-Channel 55V 51A D2Pak, Obsolete","metaDescription":"IRFZ44ZS N-Channel MOSFET from Infineon HEXFET series: 55V Vdss, 51A Id, 13.9mOhm Rds(on). Specifications and replacement info.","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":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","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":"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":"$2.8800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9d45e4085e3e9dd22dde0bdbb7938cbb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IRFZ44ZS/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for IRFZ44ZS?","answer":"A functionally similar N-channel MOSFET with 55 V Vdss, 51 A Id, and D2Pak package would be a starting point for cross-referencing. Check parametric search tools for parts with similar Rds(on) and gate charge."},{"question":"What are the specifications of IRFZ44ZS?","answer":"It comes in a D2Pak (TO-263) surface-mount package."},{"question":"Where can I buy IRFZ44ZS?","answer":"The IRFZ44ZS is obsolete and not available through standard authorized distribution channels. It can be sourced through independent semiconductor distributors. Submit an RFQ to confirm current availability and pricing — quotes are provided on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFZ44ZS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFZ44ZS when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:59:01.753Z","lastPublished":"2026-07-16T14:59:01.753Z","indexable":true}}