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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Infineon Technologies AUIRF2903ZL

Name: AUIRF2903ZL
Brand: Infineon Technologies
SKU: AUIRF2903ZL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRF2903ZL

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: AUIRF2903ZL.pdf

Description:: MOSFET N-CH 30V 160A TO262

Quantity:: RFQ Add To RFQ list

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Inventory:6,496

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Product details

Overview

AUIRF2903ZL from Infineon is an automotive-grade N-channel enhancement-mode HEXFET® Power MOSFET in TO-262 package, rated for 30 V V_DSS, 1.9 mΩ typ. R_DS(on) at 10 V V_GS, and 160 A continuous drain current (package-limited), designed for high-efficiency DC-DC conversion and motor control in engine management and battery disconnect systems.

For engineers reviewing the AUIRF2903ZL datasheet, AUIRF2903ZL pinout, AUIRF2903ZL application, or AUIRF2903ZL equivalent, key selection criteria include its 175°C junction rating, 240 nC max. gate charge, 0.65°C/W R_θJC, repetitive avalanche capability up to T_jmax, and RoHS-compliant lead-free construction.

Technical Context

This MOSFET employs advanced silicon processing to achieve ultra-low on-resistance per die area while maintaining robust thermal performance. Its 175°C maximum operating temperature and validated repetitive avalanche behavior (up to 820 mJ tested E_AS) support operation under transient overloads in automotive power rails.

The device features fast switching (t_r = 100 ns, t_f = 37 ns) with low output capacitance (C_oss = 1980 pF at V_DS = 25 V) and integrated body diode (V_SD = 1.3 V at 75 A, t_rr = 34 ns), enabling efficient synchronous rectification and hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	30 V - Maximum blocking voltage before avalanche; suitable for 12 V/24 V automotive bus protection and switching.
R_DS(on) typ.	1.9 mΩ @ V_GS = 10 V, I_D = 75 A - Enables <1.5 W conduction loss at 160 A, critical for high-current load switches.
I_D (Package)	160 A @ T_C = 25°C - Thermal limit defined by TO-262 package copper mass and solder joint integrity.
E_AS tested	820 mJ - Validated single-pulse avalanche energy; supports unclamped inductive turn-off in starter solenoid drivers.
R_θJC	0.65°C/W - Confirmed junction-to-case thermal resistance; enables direct heatsink mounting with minimal interface resistance.
Q_g max.	240 nC - Gate drive energy requirement; determines driver IC sizing and switching loss trade-offs in 20–100 kHz applications.
t_r/t_f	100 ns / 37 ns - Fast edge rates reduce switching transition time, lowering dynamic losses in PWM-controlled inverters.

Pinout & Package

TO-262 (Straight Lead, 3-Pin) package with isolated metal tab (Drain-connected). Mounting requires thermal pad soldering to PCB copper pour or external heatsink.

Pin/Terminal	Circuit Role	Design Meaning
1 (Lead)	Gate	High-impedance MOSFET control input; requires 10 V drive for full enhancement and low R_DS(on).
2 (Lead)	Drain	Main high-side or low-side current path; electrically connected to metal tab for thermal and electrical conduction.
3 (Lead)	Source	Reference node for gate drive and current sensing; tied to ground or low-side return in half-bridge configurations.

Key Features

Feature	Design Value
Ultra-low R_DS(on)	1.9 mΩ typ. - Reduces conduction loss by >30% vs. legacy 30 V MOSFETs, improving efficiency in 12 V battery-fed systems.
175°C junction rating	Rated operation up to +175°C - Supports placement near hot engine compartments without derating in under-hood ECUs.
Repetitive avalanche capability	Validated to T_jmax - Allows safe operation during load dump or inductive kickback without external snubbers in starter relays.
Fast body diode	t_rr = 34 ns, Q_rr = 29 nC - Minimizes reverse recovery loss and EMI in freewheeling paths of BLDC motor controllers.
Automotive qualification	AEC-Q101 compliant - Validated for vibration, temperature cycling, and humidity exposure per automotive reliability standards.

Applications

Engine Start/Stop System

Battery Disconnect Switch

Use Scenario: High-current engagement/disengagement of starter motor during automatic stop-start cycles.

IC Role / Device Role / Timing Role: Low-side main switch controlling 150–200 A cranking current; operates in hard-switched mode with <100 µs turn-on.

Use Value: 1.9 mΩ R_DS(on) limits voltage drop to <300 mV at peak current, ensuring reliable solenoid actuation and minimizing heat buildup during repeated starts.

Use Scenario: Isolation of auxiliary battery banks (e.g., AGM/LiFePO₄) from main vehicle bus during fault conditions.

IC Role / Device Role / Timing Role: Bidirectional load switch with integrated body diode supporting reverse current during jump-start scenarios.

Use Value: 820 mJ tested E_AS and 175°C rating enable sustained operation during short-circuit events without thermal runaway or bond-wire failure.

DC-DC Converter (12 V → 5 V)

Electric Power Steering (EPS) Inverter

Use Scenario: Primary switch in high-frequency synchronous buck converter supplying microcontrollers and sensors.

IC Role / Device Role / Timing Role: High-side switching element operating at 200–500 kHz with gate-driven synchronous rectification.

Use Value: 240 nC max. Q_g and 100 ns t_r allow efficient switching at 300 kHz while maintaining <10% duty-cycle gate drive overhead.

Use Scenario: Phase-leg switching in 3-phase inverter driving brushless DC motor in steering assist module.

IC Role / Device Role / Timing Role: Low-side switch in each leg; handles 80–120 A peak phase current with fast freewheeling via body diode.

Use Value: 34 ns t_rr and 1.3 V V_SD minimize dead-time losses and torque ripple during high-dynamic steering maneuvers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 30 V power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N3LLH6	R_DS(on) = 1.7 mΩ (lower), Q_g = 220 nC (lower), but R_θJC = 0.8°C/W (worse); TO-263 package.	Higher current density but reduced thermal margin in constrained heatsink layouts.	Prefer when board space is limited and gate drive strength allows lower Q_g; avoid if case temperature exceeds 110°C.
IRF1405ZPBF	R_DS(on) = 3.3 mΩ (higher), no AEC-Q101 qualification, 150°C T_j rating, TO-220 package.	Not qualified for automotive use; unsuitable for under-hood deployment or safety-critical functions.	Acceptable only for non-automotive industrial prototypes where qualification is not required and thermal headroom exists.

Compared with STL220N3LLH6 and IRF1405ZPBF, AUIRF2903ZL delivers optimal balance of low R_DS(on), proven automotive reliability, and superior thermal resistance-making it the preferred choice for production-grade 12 V/24 V power switching where junction temperature stability and long-term field robustness are mandatory.

Availability

AUIRF2903ZL is available at Aetrix Electronics and suitable for engine control units, battery management systems, and electric power steering modules requiring stable component supply across multi-year automotive production programs.

Supply support for AUIRF2903ZL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and qualification infrastructure.

AUIRF2903ZL belongs to the HEXFET® Automotive Power MOSFET product line, engineered specifically for high-reliability 12 V/24 V automotive power distribution, including start-stop systems, battery switches, and motor drives.

FAQ

What is the maximum continuous drain current for AUIRF2903ZL at 100°C case temperature?

The maximum continuous drain current at T_C = 100°C is 166 A (silicon-limited) per the Absolute Maximum Ratings table. However, the package-limited rating remains 160 A regardless of temperature, as bond wire current capacity defines the practical ceiling. Derating curves confirm usable current drops to ~130 A at T_C = 125°C due to thermal constraints.

Is AUIRF2903ZL pin-compatible with AUIRF2903ZS?

No-AUIRF2903ZL uses TO-262 (straight-lead) packaging, while AUIRF2903ZS uses D²PAK (TO-263) with gull-wing leads. Pin numbering is identical (G-D-S), but mechanical footprint, thermal pad layout, and soldering requirements differ significantly. PCB redesign is required for substitution.

Does AUIRF2903ZL support gate drive voltages below 10 V?

Yes-gate threshold voltage (V_GS(th)) ranges from 2.0 V to 4.0 V, so partial enhancement occurs at 5 V. However, R_DS(on) increases sharply below 8 V: at 5 V V_GS, R_DS(on) is ~5.2 mΩ (typ.), doubling conduction loss. Full-rated performance requires ≥10 V gate drive.

What is the recommended gate resistor value for hard-switched 100 kHz operation?

For 100 kHz hard-switching with 12 V gate drive, a 3.2 Ω gate resistor is validated in the datasheet (Fig. 18a/b) to achieve t_d(off) = 48 ns and t_f = 37 ns while limiting ringing. Lower values (<2 Ω) increase dV/dt stress and EMI; higher values (>5 Ω) raise switching losses disproportionately due to 240 nC Q_g.

AUIRF2903ZL Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 160A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 2.4mOhm @ 75A, 10V

Vgs(th) (Max) @ Id:: 4V @ 150µA

Gate Charge (Qg) (Max) @ Vgs:: 240 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 6320 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 231W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-262

AUIRF2903ZL FAQ

1.How can I place an order for AUIRF2903ZL through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRF2903ZL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AUIRF2903ZL reliable?

The price and inventory of AUIRF2903ZL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRF2903ZL is usually 5 days.

3.What payment methods are accepted for AUIRF2903ZL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRF2903ZL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRF2903ZL?

AUIRF2903ZL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRF2903ZL order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AUIRF2903ZL?

For technical support, including AUIRF2903ZL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRF2903ZL requirements.

6.How does Aetrix verify that AUIRF2903ZL is sourced from the original manufacturer or authorized distributors?

All AUIRF2903ZL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AUIRF2903ZL meets industry standards.

7.What is the process for return or replacement of AUIRF2903ZL?

All AUIRF2903ZL units undergo pre-shipment inspection (PSI). If there is an issue with AUIRF2903ZL, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AUIRF2903ZL part is unused and in its original packaging.

Return procedure for AUIRF2903ZL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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