{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IRLZ44ZL","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IRLZ44ZL","canonicalUrl":"https://icboms.com/infineon/IRLZ44ZL","factsUrl":"https://icboms.com/api/mcp/products/IRLZ44ZL","rawCanonicalId":null},"summary":{"shortDescription":"IRLZ44ZL, Infineon / International Rectifier HEXFET® series, N-Channel MOSFET, 55V Vdss, 51A Id, 13.5mΩ Rds(on) @ 10V, logic-level gate drive, TO-262 through-hole package, -55°C to 175°C junction temperature.","salesMarkdown":"The device is packaged in a through-hole TO-262 (I²Pak) with long leads, suited for board-level power switching where a solder-in heatsink or clip is preferred over a surface-mount footprint. If you are qualifying a substitute, verify the package outline and thermal interface against your heatsink design. At 31 A that is about 13 W of dissipation in the channel alone — well within the 80 W package limit, but the TO-262 tab must be heatsunk to keep junction temperature under 175 °C. Gate charge is 36 nC at 5 V, which is modest; a typical microcontroller GPIO can switch it at tens of kilohertz without a dedicated gate driver, though a series resistor in the gate path helps control ringing. ## Package and mounting — TO-262 through-hole The IRLZ44ZL comes in a TO-262 package (I²Pak variant with long leads), supplied in Tube form. It is a through-hole device intended for insertion into a PCB and soldered on the opposite side. The metal tab is the drain connection and provides the primary thermal path — a heatsink clip or a thermal pad against a chassis plane is expected for any continuous current above a few amps. The long leads give extra clearance for mounting to a heatsink that stands off the board.","metaTitle":"IRLZ44ZL HEXFET N-Channel MOSFET, 55V 51A, TO-262","metaDescription":"IRLZ44ZL HEXFET N-Channel MOSFET, 55V drain-source, 51A continuous, 13.5mΩ Rds(on) at 10V. TO-262 package, -55°C to 175°C.","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)":"±16V","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":"3V @ 250µA","Operating Temperature":"-55°C~175°C(TJ)","Rds On (Max) @ Id, Vgs":"13.5mOhm @ 31A, 10V","Power Dissipation (Max)":"80W (Tc)","Supplier Device Package":"TO-262","Gate Charge (Qg) (Max) @ Vgs":"36 nC @ 5 V","Drain to Source Voltage (Vdss)":"55 V","Input Capacitance (Ciss) (Max) @ Vds":"1620 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"4.5V, 10V","Current - Continuous Drain (Id) @ 25°C":"51A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8b115a363070061375a79c3374690212.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is IRLZ44ZL obsolete?","answer":"Yes, the IRLZ44ZL is listed as Obsolete. It is no longer manufactured by Infineon / International Rectifier. Sourcing is limited to surplus and independent-distribution channels."},{"question":"What is the Rds(on) of IRLZ44ZL?","answer":"It is also specified with a 4.5 V logic-level drive, though the on-resistance will be higher at that lower gate voltage."},{"question":"IRLZ44ZL vs IRLZ44Z: what are the differences?","answer":"The IRLZ44ZL and IRLZ44Z share the same HEXFET die and identical electrical ratings (55 V, 51 A, 13.5 mΩ Rds(on)). The difference is the package: the IRLZ44ZL is in a TO-262 (I²Pak with long leads, through-hole), while the IRLZ44Z is in a TO-220AB. The TO-262 has longer leads and a different tab shape, so they are not footprint-compatible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IRLZ44ZL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IRLZ44ZL 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}}