Infineon Technologies AUIRF7103Q

Overview

AUIRF7103Q from Infineon is a dual-channel automotive-grade N-channel Power MOSFET in SO-8 package, rated for 50 V V_DS, 3.0 A continuous drain current at 4.5 V gate drive, and 130 mΩ R_DS(on) max at 10 V. It features logic-level gate drive, 175°C junction operation, and repetitive avalanche capability-designed for high-reliability DC-DC converters and motor control in engine management and body electronics.

For engineers reviewing the AUIRF7103Q datasheet, AUIRF7103Q pinout, AUIRF7103Q application, or AUIRF7103Q equivalent, key selection criteria include its dual-N-channel configuration, SO-8 thermal performance (R_θJA = 62.5°C/W), 10 nC typical gate charge, 12 V/ns dv/dt rating, and automotive qualification per AEC-Q101.

Technical Context

This device integrates two independent N-channel HEXFET® MOSFETs on a single SO-8 die, sharing no internal connection between channels-enabling synchronous buck topologies or half-bridge configurations with discrete gate control. Its planar silicon process delivers low R_DS(on) density while maintaining robust avalanche energy handling (22 mJ single-pulse) and fast switching (t_r = 1.7 ns, t_f = 2.3 ns).

The device supports logic-level drive down to 4.5 V, with V_GS(th) spanning 1.0–3.0 V and dynamic parameters including C_iss = 255 pF and Q_gd = 2.8 nC-critical for minimizing Miller-induced shoot-through in high-frequency automotive power stages operating up to 1 MHz.

Key Specifications

Pinout & Package

Package: SO-8 (Surface-Mount, 150 mil width), thermally enhanced with exposed drain pad connected to pins 1, 2, 3, and 4 for both channels.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-N-channel automotive MOSFET applications.

Compared with STP10NK50ZFP and NTMFS4C09NT1G, the AUIRF7103Q uniquely balances dual-channel integration, AEC-Q101 compliance, 50 V rating, and logic-level drive in SO-8-making it optimal for space- and reliability-constrained 12 V power stages in powertrain and chassis ECUs.

Availability

AUIRF7103Q is available at Aetrix Electronics and suitable for engine control units, HVAC motor controllers, LED headlamp matrices, and transmission solenoid drivers requiring stable component supply across automotive production lifecycles.

Supply support for AUIRF7103Q 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and qualification infrastructure.

The AUIRF7103Q belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in engine, transmission, and body electronics under harsh environmental conditions.

FAQ

Is AUIRF7103Q suitable for synchronous rectification in 12 V automotive DC-DC converters?

Yes. Its dual-N-channel SO-8 configuration, 130 mΩ R_DS(on), and 10 nC Q_g enable efficient synchronous rectification at up to 1 MHz. The matched channel characteristics and low C_oss (69 pF) reduce switching losses and improve light-load efficiency versus Schottky diodes.

What is the maximum safe continuous current at 105°C ambient temperature?

At T_A = 105°C, derated using R_θJA = 62.5°C/W and T_Jmax = 175°C, the maximum continuous drain current is approximately 1.12 A per channel. This assumes SO-8 mounted on 1 in² copper and accounts for thermal saturation effects above 70°C ambient.

Does AUIRF7103Q require external gate resistors for automotive PWM applications?

Yes-gate resistors (typically 5–22 Ω) are recommended to damp ringing, limit peak gate current, and control dv/dt during switching. The 2.8 nC Q_gd and 12 V/ns rated dv/dt make controlled turn-on/turn-off essential to prevent cross-conduction in half-bridge configurations.

Can AUIRF7103Q replace discrete single-channel MOSFETs in existing designs?

Yes, with layout adaptation. Its dual-channel structure replaces two discrete SO-8 or SOT-23 devices, reducing PCB area and component count. Pinout differs from single-channel parts-G1/S1/D1 occupy pins 5/6/1–4, while G2/S2 use pins 7/8-requiring netlist and routing updates.