Infineon Technologies IPI45N06S409AKSA1

Overview

IPI45N06S409AKSA1 from Infineon Technologies is a 60 V, 45 A N-channel enhancement-mode power MOSFET in PG-TO262-3-1 package, AEC-Q101 qualified for automotive applications, with R_DS(on) max of 9.2 mΩ at V_GS = 10 V and 100% single-pulse avalanche tested to 97 mJ. It operates up to 175 °C junction temperature and supports high-current motor drive and DC-DC converter primary-side switching.

For engineers reviewing the IPI45N06S409AKSA1 datasheet, IPI45N06S409AKSA1 pinout, IPI45N06S409AKSA1 application, or IPI45N06S409AKSA1 equivalent, key selection criteria include its 2.1 K/W thermal resistance (junction-to-case), 7.6–9.1 mΩ typical R_DS(on) in SMD configuration, 180 A pulsed drain current capability, and integrated body diode with 0.6–1.3 V forward voltage at 45 A.

Technical Context

This OptiMOS®-T2 device uses trench-gate superjunction technology optimized for low conduction and switching losses in hard-switched automotive power stages. Its gate threshold voltage (2.0–4.0 V) ensures robust noise immunity while enabling direct 5 V or 3.3 V logic-level drive compatibility when used with appropriate gate drivers.

The MOSFET features fully characterized dynamic parameters including 3785 pF input capacitance, 930 pF output capacitance, and 60 pF reverse transfer capacitance at V_DS = 25 V - enabling accurate snubber design and EMI prediction in high-frequency SMPS and BLDC inverters.

Key Specifications

Pinout & Package

Package: PG-TO262-3-1 (TO-262 variant with isolated tab, 3-pin straight lead). Thermal pad electrically connected to drain. Mounting requires insulating washer or thermal pad if heatsink is grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IPB45N06S409AKSA1 and IPP45N06S409AKSA1, the IPI45N06S409AKSA1 offers identical electrical performance but optimized thermal interface for vertical heatsink mounting in TO-262 form factor - balancing manufacturability, thermal efficiency, and mechanical stability in production automotive modules.

Availability

IPI45N06S409AKSA1 is available at Aetrix Electronics and suitable for automotive motor control, 48 V DC-DC conversion, and industrial BLDC inverter applications requiring stable component supply across multi-year production cycles.

Supply support for IPI45N06S409AKSA1 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 R&D and manufacturing infrastructure.

This part belongs to the OptiMOS®-T2 product line, engineered specifically for high-efficiency, high-reliability power switching in automotive and industrial applications where thermal robustness and avalanche tolerance are critical.

FAQ

What is the maximum allowable gate-source voltage for IPI45N06S409AKSA1?

The absolute maximum gate-source voltage is ±20 V. Operation beyond ±15 V risks permanent gate oxide damage. For reliable 10 V gate drive, use a dedicated gate driver IC with rail-to-rail output and transient overvoltage protection, especially in noisy automotive environments where load dump or inductive kick can exceed ratings.

Does IPI45N06S409AKSA1 require a gate resistor, and what value is recommended?

Yes - a gate resistor is mandatory to control dV/dt and prevent oscillation. For 100 kHz switching with 45 A load, a 3.3–5.6 Ω non-inductive resistor is recommended. Lower values improve switching speed but increase EMI and gate driver stress; higher values reduce ringing but raise switching losses. Layout parasitics must be minimized regardless of resistor choice.

Can IPI45N06S409AKSA1 be used in parallel configurations?

Yes, but only with matched devices and symmetrical PCB layout. Thermal coupling and gate drive impedance must be identical per device. Use Kelvin source connections and individual gate resistors. Derate total current by ≥15% to account for parameter spread (R_DS(on), V_GS(th)) and thermal imbalance - confirmed in Infineon's AN2015-04 application note.

Is the body diode suitable for synchronous rectification in a buck converter?

The integrated body diode has a forward voltage of 0.6–1.3 V at 45 A and reverse recovery time of ≤45 ns, making it usable for low-frequency (<50 kHz) synchronous rectification. However, for high-efficiency >100 kHz designs, an external Schottky or GaN FET is preferred due to lower V_F and zero Q_rr.