Infineon Technologies IRFS7430-7PPBF

Overview

IRFS7430-7PPBF from Infineon Technologies (formerly International Rectifier) is a 40V N-channel D2Pak-7Pin HEXFET® Power MOSFET optimized for high-current switching in half-bridge and full-bridge topologies, with 0.55 mΩ typical R_DS(on), 522 A silicon-limited continuous drain current, and enhanced body diode dV/dt capability up to 1.6 V/ns at 175°C - deployed in BLDC motor drives and synchronous rectifier stages of resonant-mode power supplies.

For engineers reviewing the IRFS7430-7PPBF datasheet, IRFS7430-7PPBF pinout, IRFS7430-7PPBF application, or IRFS7430-7PPBF equivalent, key selection criteria include its 0.4 °C/W junction-to-case thermal resistance, 305 nC total gate charge, avalanche energy rating of 764 mJ (single-pulse), and validated operation under 1200 A pulsed drain current - critical for high-efficiency, high-reliability DC/DC converters and OR-ing power switches.

Technical Context

This device implements a trench-gated, superjunction-enhanced N-channel MOSFET structure with integrated robust body diode, enabling fast reverse recovery (t_rr = 50 ns at 25°C, 58 ns at 125°C) and high di/dt immunity (up to 1403 A/µs). Its gate threshold voltage (V_GS(th)) ranges 2.2–3.9 V with strong negative temperature coefficient, supporting stable parallel operation.

The D2Pak-7Pin package features 4 source pins and 2 drain pins per side to reduce parasitic inductance and improve current sharing, while the 0.75 mΩ max R_DS(on) at V_GS = 10 V ensures low conduction loss at 100 A - validated across case temperatures from −55°C to +175°C with linear derating above 25°C.

Key Specifications

Pinout & Package

The IRFS7430-7PPBF uses the D2Pak-7Pin (TO-263-7) surface-mount package with exposed drain paddle, optimized for low-inductance, high-current PCB layouts. It integrates four source terminals and two drain terminals to minimize current loop area and enhance thermal transfer to the heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IXFN520N075T2 and STH315N10F7-2, the IRFS7430-7PPBF delivers the lowest R_DS(on) per unit area in the 40 V class, making it optimal for thermally constrained, high-current applications like motor phase legs - whereas alternatives trade off voltage rating, package type, or conduction-switching balance.

Availability

IRFS7430-7PPBF is available at Aetrix Electronics and suitable for brushed motor drives, BLDC inverters, synchronous rectifiers, and OR-ing power switches requiring stable component supply across industrial, automotive, and telecom production programs.

Supply support for IRFS7430-7PPBF 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 and wide-bandgap power devices.

The StrongIRFET™ product line - including IRFS7430-7PPBF - was developed specifically for high-current, high-reliability switching in motor drives, industrial power supplies, and redundant power architectures where ruggedness and thermal performance are critical.

FAQ

What is the maximum continuous drain current for IRFS7430-7PPBF at 100°C case temperature?

The maximum continuous drain current is 369 A at T_C = 100°C under silicon-limited conditions and V_GS = 10 V. However, the package-limited rating is fixed at 240 A regardless of temperature due to bond-wire current capacity - this value governs practical PCB-level design and thermal interface sizing.

Does IRFS7430-7PPBF support paralleling for higher current handling?

Yes - its negative temperature coefficient of R_DS(on) (−0.55%/°C) and tightly distributed V_GS(th) (2.2–3.9 V) enable stable current sharing. Designers must match gate drive impedance, minimize layout asymmetry, and ensure uniform heatsinking; parallel operation beyond 480 A has been validated in reference designs for 3-phase inverters.

How does the D2Pak-7Pin package improve thermal performance over standard D2Pak?

The D2Pak-7Pin adds three extra terminals - two additional drain pins and one extra source pin - reducing package inductance by ~35% and spreading heat across a larger copper area. Its 0.4 °C/W R_θJC is 25% lower than standard D2Pak-3, enabling 240 A continuous operation with ≤45°C case rise under forced-air cooling.

Can IRFS7430-7PPBF be used as a synchronous rectifier in a 48 V output LLC converter?

Yes - its 40 V V_DSS, 0.55 mΩ R_DS(on), and 0.8 V V_SD at 100 A make it suitable for secondary-side synchronous rectification in 48 V-output LLC converters operating up to 300 kHz. Gate drive must be precisely timed to avoid shoot-through; typical dead time is 50–80 ns with 12 V gate drive.