Infineon Technologies IRFI4212H-117PXKMA1

Overview

IRFI4212H-117PXKMA1 from Infineon Technologies is a discrete power MOSFET half-bridge module designed for Class-D audio amplifiers. It integrates two N-channel enhancement-mode MOSFETs in a single TO-220 Full-Pak 5-pin package, with V_DS = 100 V, R_DS(on) = 58 mΩ (typ.), Q_g = 12 nC (typ.), and Q_rr = 56 nC (typ.), enabling up to 150 W per channel into 4 Ω in half-bridge topology.

For engineers reviewing the IRFI4212H-117PXKMA1 datasheet, IRFI4212H-117PXKMA1 pinout, IRFI4212H-117PXKMA1 application, or IRFI4212H-117PXKMA1 equivalent, key selection criteria include low gate charge for THD reduction, optimized body-diode reverse recovery for EMI suppression, and thermal resistance R_θJC = 7.1 °C/W for high-power audio stage reliability.

Technical Context

This half-bridge integrates complementary high-side and low-side N-channel MOSFETs with matched die characteristics and shared thermal path. Internal gate resistance (R_G(int) = 3.4 Ω) and low C_iss (490 pF) support fast, controlled switching at >300 kHz carrier frequencies typical of Class-D modulation.

Optimized body-diode parameters - t_rr = 36 ns (typ.), Q_rr = 56 nC (typ.), V_SD = 1.3 V (max) - minimize shoot-through risk and voltage spikes during dead-time commutation in bridge-leg operation.

Key Specifications

Pinout & Package

IRFI4212H-117PXKMA1 uses the TO-220 Full-Pak 5-pin package with isolated tab (non-conductive mounting surface) and lead-form option 117. The package integrates dual MOSFETs sharing common source connection internally, with separate gate and drain terminals for independent control.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge MOSFET applications.

Compared with STW48N60M2 and IXFH30N60P, IRFI4212H-117PXKMA1 delivers superior audio-specific performance via monolithic half-bridge integration, 36% lower Q_rr, and 18% lower R_DS(on), directly enabling higher power density and lower THD in space-constrained consumer audio systems.

Availability

IRFI4212H-117PXKMA1 is available at Aetrix Electronics and suitable for home theater amplifiers, active loudspeaker modules, and automotive subwoofer amplifiers requiring stable component supply and consistent parametric performance across production batches.

Supply support for IRFI4212H-117PXKMA1 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.

This device belongs to Infineon's "StrongIRFET™" family, engineered specifically for high-efficiency, high-fidelity Class-D audio power stages - emphasizing low Q_rr, tight R_DS(on) matching, and robust avalanche capability.

FAQ

What is the maximum continuous output power achievable per channel using IRFI4212H-117PXKMA1 in a half-bridge configuration?

At T_C = 25 °C with adequate heatsinking (R_θJC ≤ 7.1 °C/W), the device supports up to 150 W into a 4 Ω load per channel. This assumes V_DD = ±35 V, 50% duty cycle, and proper dead-time control to avoid shoot-through. Derating to 90 W is recommended at T_C = 85 °C.

Does IRFI4212H-117PXKMA1 require external gate resistors for stable switching?

Yes - although it features internal gate resistance (3.4 Ω), an external series gate resistor (typically 5–15 Ω) is required to dampen parasitic oscillation and control dV/dt during hard switching. Values depend on gate driver strength and PCB layout; 10 Ω is commonly used with IRS2092S drivers.

Can this part be used in synchronous rectification topologies?

No - IRFI4212H-117PXKMA1 is configured as a high-side/low-side N-channel half-bridge with common-source output. Its body diodes are optimized for Class-D freewheeling, not synchronous rectification; no independent control of the low-side source node is provided.

Is the TO-220 Full-Pak 5-pin package electrically isolated?

Yes - the metal tab is electrically isolated from all internal terminals (G1/G2/D1/D2/S1-S2), allowing direct mechanical mounting to a common heatsink without insulating hardware. Isolation voltage rating is 2.5 kV RMS per UL 60950-1.