Infineon Technologies IRLR3103

Overview

IRLR3103 from Infineon Technologies (formerly International Rectifier) is a logic-level N-channel enhancement-mode power MOSFET in D-PAK (TO-252AA) surface-mount package, rated for 30V V_DSS, 55A continuous drain current at T_C = 25°C, and 0.019Ω R_DS(on) at V_GS = 10V. It features ultra-low on-resistance, fast switching, full avalanche rating, and is optimized for high-efficiency DC-DC converters and motor drive half-bridges.

For engineers reviewing the IRLR3103 datasheet, IRLR3103 pinout, IRLR3103 application, or IRLR3103 equivalent, key selection criteria include gate threshold voltage (1.0–2.5V), pulsed drain current (220A), junction-to-case thermal resistance (1.4°C/W), and diode reverse recovery charge (210–310nC) in synchronous rectification and load-switching designs.

Technical Context

This HEXFET device uses fifth-generation silicon process technology to minimize conduction loss while maintaining rugged unclamped inductive switching capability. Its low gate charge (Q_g = 50nC) and moderate Miller charge (Q_gd = 28nC) enable efficient operation with standard gate drivers at frequencies up to several hundred kHz.

The integrated body diode exhibits 1.3V forward voltage at 28A and 25°C, with reverse recovery time of 81–120ns and peak diode recovery dv/dt tolerance of 5.0V/ns - critical for minimizing switching losses and EMI in hard-switched topologies.

Key Specifications

Pinout & Package

IRLR3103 is housed in a D-PAK (TO-252AA) thermally enhanced surface-mount package with exposed drain pad for low thermal resistance (R_θJC = 1.4°C/W). The three terminals are arranged in a straight-line configuration: Source (S), Drain (D), and Gate (G).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRLR3103, the IRL3103PBF offers identical electrical performance in a through-hole format but sacrifices thermal performance and board area efficiency, while the STP30NF20 trades voltage headroom and gate drive simplicity for reduced availability and higher on-resistance in 30V applications.

Availability

IRLR3103 is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, hot-swap modules, and server load switches requiring stable component supply and long-term industrial lifecycle support.

Supply support for IRLR3103 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 global semiconductor leader specializing in power management, sensor, and automotive ICs, with deep expertise in silicon-based power devices and wide-bandgap solutions.

The HEXFET® Power MOSFET product line - including IRLR3103 - was developed for high-efficiency, high-reliability power conversion in industrial, computing, and transportation systems where low R_DS(on), fast switching, and ruggedness are critical.

FAQ

What is the maximum safe operating temperature for IRLR3103?

The IRLR3103 has a maximum junction temperature (T_J) of +175°C and storage temperature range from –55°C to +175°C. Under continuous operation, case temperature must be limited to ensure junction temperature stays within this bound - for example, at 55A drain current and 25°C ambient, thermal design must maintain R_θJA ≤ 50°C/W with appropriate PCB copper area and airflow.

Does IRLR3103 require a gate resistor for stability?

Yes - a series gate resistor (typically 3.4–10Ω) is recommended to dampen parasitic oscillation caused by gate-drain capacitance and PCB trace inductance. Data sheet switching tests used RG = 3.4Ω; omitting it may cause ringing, excessive EMI, or gate overvoltage exceeding ±16V absolute maximum rating.

Can IRLR3103 be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) (see Fig 4) enables current sharing across paralleled devices. However, matched layout symmetry, individual gate resistors, and Kelvin-source routing are essential to avoid thermal runaway; derating total current by 15% is advised for reliability in multi-device arrays.

Is the body diode suitable for reverse polarity protection?

No - the intrinsic body diode conducts forward from source to drain, making it unsuitable for reverse polarity protection. For that function, a dedicated P-channel MOSFET or Schottky diode is required. The body diode is intended for freewheeling or synchronous rectification, not reverse-blocking applications.