{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRFZ44VZS","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRFZ44VZS","canonicalUrl":"https://icboms.com/infineon/IRFZ44VZS","factsUrl":"https://icboms.com/api/mcp/products/IRFZ44VZS","rawCanonicalId":null},"summary":{"shortDescription":"IRFZ44VZS, HEXFET® series, N-Channel MOSFET, 60V Vdss, 57A Id, 12mOhm Rds(on) at 10V, D2PAK surface mount, -55°C to 175°C.","salesMarkdown":"The IRFZ44VZS is listed as obsolete. No last-time-buy window remains; the part is what it is on the shelf today. ## 60V, 57A, 12mΩ — where this part fits In a switching power supply — which is the natural application for a 60 V trench MOSFET — the D2PAK tab carries the heat. A good via stitch under the tab to a copper plane is the difference between 92 W and a junction that runs away at 40 W. ## Reworking the D2PAK — what to watch The D2PAK (TO-263) is a surface-mount tab package. The tab is the drain — it's also the main thermal path. When you're pulling this off a board with hot air, preheat the board to 125°C minimum before you hit the tab with the nozzle. The tab sinks heat fast; without preheat you'll cook the plastic body trying to melt the solder on the tab. Replacing it: clean the pad, apply fresh solder paste or tacky flux, and reflow with a bottom-side preheater if you have one. The tab's solder joint is the one that matters — the three leads are secondary. That's the full military temperature range — this part can sit in an engine bay, a downhole tool, or a satellite power bus. The 175°C junction limit gives headroom for high-ambient designs where the case runs hot. Just remember: the 57 A rating is at 25°C case; derate linearly above that, and at 100°C case you're looking at roughly 40 A usable.","metaTitle":"IRFZ44VZS HEXFET N-Channel MOSFET, 60V 57A 12mΩ D2PAK","metaDescription":"IRFZ44VZS HEXFET N-Channel MOSFET, 60V Vdss, 57A continuous drain, 12mΩ Rds(on) at 10V. D2PAK surface mount. Request quote.","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":"12mOhm @ 34A, 10V","Power Dissipation (Max)":"92W (Tc)","Supplier Device Package":"D2PAK","Gate Charge (Qg) (Max) @ Vgs":"65 nC @ 10 V","Drain to Source Voltage (Vdss)":"60 V","Input Capacitance (Ciss) (Max) @ Vds":"1690 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"57A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e799361c53521c7e87bc4617f85a111b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IRFZ44VZS/alternatives.json"},"ai":{"faq":[{"question":"What is a replacement for IRFZ44VZS?","answer":"The closest parametric match in the same package is the starting point for a cross-reference search."},{"question":"Can I use IRFZ44VZS in a switching power supply?","answer":"Yes. The 60 V drain-source voltage, 57 A continuous drain current, 12 mΩ on-resistance, and 65 nC gate charge make it well suited for DC-DC converters, buck regulators, and other hard-switching topologies up to a few hundred kilohertz. The D2PAK package handles the thermal dissipation when properly heatsunk to the board copper."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRFZ44VZS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRFZ44VZS when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:41:32.453Z","lastPublished":"2026-07-16T14:41:32.453Z","indexable":true}}