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Infineon Technologies AUIRLZ44ZL — Discrete Semiconductors
Infineon Technologies

AUIRLZ44ZL MOSFET N-Ch 55V 51A TO-220AB, AEC-Q101

MPNAUIRLZ44ZL
Active

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.

$0.76Ref. price · indicative, final on quote
AUIRLZ44ZL datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

AUIRLZ44ZL Technical Specifications
ParameterValue
SeriesAutomotive, AEC-Q101, HEXFET®
FET typeN-Channel
Mounting_typeThrough Hole
Operating temperature high-55°C to 175°C(TJ)
Vgs±16 V
Power_w80.0
Package_typeBulk
Capacitance_uf0.0016
Product_statusActive
Supply_voltage_v55.0
Vgs(Th) (Max) @ id3 V @ 250µA
Switching_current_a51.0
Rds on (Max) @ id, vgs13.5mOhm @ 31 A, 10 V
Gate charge (Qg) (Max) @ vgs36 nC @ 5 V

Product details

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.

Frequently asked questions

Is AUIRLZ44ZL automotive grade?

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.

What is the difference between AUIRLZ44ZL and AUIRLZ44Z?

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.

What is the closest pin-compatible alternative to AUIRLZ44ZL?

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.