{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AUIRLZ44ZL","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"AUIRLZ44ZL","canonicalUrl":"https://icboms.com/infineon/AUIRLZ44ZL","factsUrl":"https://icboms.com/api/mcp/products/AUIRLZ44ZL","rawCanonicalId":null},"summary":{"shortDescription":"Infineon AUIRLZ44ZL N-Channel MOSFET, 55 V, 51 A, 13.5 mOhm Rds(on) @ 31 A, 10 V, TO-220AB, AEC-Q101 qualified, HEXFET series, -55 to 175 °C junction temperature.","salesMarkdown":"## N-channel 55 V logic-level MOSFET for automotive and industrial switching The Infineon AUIRLZ44ZL is an N-channel logic-level power MOSFET in the HEXFET series, rated at 55 V drain-source breakdown and 51 A continuous drain current, housed in a TO-220AB through-hole package. It is AEC-Q101 qualified, making it suited for automotive powertrain, transmission control, and electric power-steering applications where junction temperatures can reach 175 °C. The 13.5 mΩ maximum on-resistance at 31 A and 10 V gate drive keeps conduction losses low in high-current paths like solenoid drivers, DC-DC converters, and motor pre-drive stages. Gate charge is 36 nC at 5 V, which means a modest gate driver can switch this part at moderate frequencies without excessive drive power. The maximum gate-source voltage is ±16 V — exceeding that during overshoot or ringing damages the oxide; ensure the drive circuit clamps within that window. ## Active lifecycle — no last-time-buy pressure The manufacturer lists the AUIRLZ44ZL as Active (current production). Because it is a current-production automotive-grade MOSFET, date-code freshness and full AEC-Q101 traceability are expected from authorized supply. Any surplus stock surfacing far outside the normal production window should be verified for counterfeit risk. ## What the key ratings mean for the BOM The 36 nC gate charge at 5 V is low enough that a standard gate driver IC can switch this MOSFET, keeping switching losses manageable.","metaTitle":"AUIRLZ44ZL MOSFET N-Ch 55V 51A TO-220AB, AEC-Q101","metaDescription":"Infineon AUIRLZ44ZL N-channel MOSFET, 55V 51A, 13.5mΩ Rds(on), TO-220AB. AEC-Q101 qualified. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Vgs":"±16 V","series":"Automotive, AEC-Q101, HEXFET®","power_w":"80.0","Fet Type":"N-Channel","package_type":"Bulk","mounting_type":"Through Hole","capacitance_uf":"0.0016","product_status":"Active","lifecycle_stage":"eol_hot","supply_voltage_v":"55.0","Vgs(Th) (Max) @ Id":"3 V @ 250µA","switching_current_a":"51.0","Rds On (Max) @ Id, Vgs":"13.5mOhm @ 31 A, 10 V","Operating Temperature High":"-55°C to 175°C(TJ)","Gate Charge (Qg) (Max) @ Vgs":"36 nC @ 5 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.76","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/786781c2cc9cbf6ecd27b5b35679f86d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is AUIRLZ44ZL automotive grade?","answer":"Yes, it is in the Automotive series and AEC-Q101 qualified, which means it meets the stress and reliability tests required for automotive under-hood and chassis applications."},{"question":"What is the difference between AUIRLZ44ZL and AUIRLZ44Z?","answer":"The difference is typically in the package or lead-free finish designation. Both share the same 55 V, 51 A, 13.5 mΩ die. The 'L' suffix often indicates lead-free / RoHS-compliant plating. Verify the exact suffix against your BOM's environmental compliance requirements."},{"question":"What is the closest pin-compatible alternative to AUIRLZ44ZL?","answer":"Within the same HEXFET family, the AUIRLZ44Z (without the L suffix) is a direct pin-compatible alternative if lead-free finish is not required. For a different brand, compare parts with the same TO-220AB footprint, 55 V minimum rating, and similar Rds(on) — but no single cross is guaranteed without testing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/AUIRLZ44ZL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/AUIRLZ44ZL 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}}