Infineon Technologies IRLR3103PBF

Overview

IRLR3103PBF from Infineon (formerly International Rectifier) is a logic-level N-channel enhancement-mode Power MOSFET in D-PAK (TO-252AA) 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, and full avalanche rating - deployed in DC-DC synchronous rectification, motor drive half-bridges, and high-efficiency power supplies.

For engineers reviewing the IRLR3103PBF datasheet, IRLR3103PBF pinout, IRLR3103PBF application, or IRLR3103PBF equivalent, key selection criteria include gate threshold voltage (1.0–2.5V), pulsed drain current capability (220A), junction-to-case thermal resistance (1.4°C/W), and body diode reverse recovery charge (210–310nC) under 100A/µs di/dt.

Technical Context

This HEXFET device uses fifth-generation silicon process to achieve low R_DS(on) per die area while maintaining rugged unclamped inductive switching performance. Its logic-level gate enables direct drive from 3.3V/5V microcontrollers without level-shifting.

The integrated body diode supports freewheeling in buck converters and H-bridge motor control, with measured t_rr = 81–120ns and Q_rr = 210–310nC at T_J = 25°C, IF = 34A, and di/dt = 100A/µs - critical for minimizing switching losses in high-frequency topologies.

Key Specifications

Pinout & Package

D-PAK (TO-252AA) surface-mount package with exposed drain pad for thermal and electrical connection. Standard three-terminal configuration optimized for PCB heat spreading and low-inductance layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRL3103PBF and STP36NF06L, the IRLR3103PBF delivers superior current density and thermal performance in surface-mount layouts, while retaining identical silicon characteristics - making it the optimal choice for production-grade 24V power stages where board space and thermal management are constrained.

Availability

IRLR3103PBF is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, and hot-swap controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant lead-free packaging.

Supply support for IRLR3103PBF 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 acquired International Rectifier in 2015 and continues its legacy of high-performance power semiconductors with rigorous qualification and automotive-grade reliability testing.

This part belongs to the HEXFET® Power MOSFET product line, engineered specifically for high-efficiency, high-current switching in industrial power supplies, motor controls, and battery-powered systems demanding low R_DS(on) and fast dynamic response.

FAQ

What is the maximum safe operating temperature for IRLR3103PBF?

The IRLR3103PBF has a maximum operating junction temperature of +175°C and storage temperature range from –55°C to +175°C. Its thermal design must ensure junction temperature remains below this limit under worst-case power dissipation and ambient conditions, using the specified R_θJC = 1.4°C/W and PCB copper area guidelines from AN-994.

Can IRLR3103PBF be driven directly from a 3.3V microcontroller GPIO?

No - while the gate threshold voltage starts at 1.0V, full enhancement requires V_GS ≥ 4.5V for R_DS(on) ≤ 0.024Ω. A 3.3V GPIO cannot reliably achieve this; a dedicated gate driver (e.g., TC4427) or level shifter is required to deliver ≥4.5V with sufficient peak current for 50nC Q_g.

Does IRLR3103PBF have an integrated ESD protection diode on the gate?

Yes - the device includes built-in gate protection with ±100nA gate leakage at ±16V and absolute maximum V_GS rating of ±16V. However, external 10–22Ω series gate resistor and optional Zener clamp (e.g., 12V) are recommended in high-noise environments to prevent transient-induced gate oxide damage.

How does the body diode performance compare to discrete Schottky diodes?

The integrated body diode has V_SD = 1.3V at 28A and t_rr = 81–120ns, which is slower and higher forward drop than optimized Schottky diodes (e.g., 0.55V, <10ns). It is intended for freewheeling, not primary rectification; use external Schottky for highest efficiency in non-synchronous designs.