Infineon Technologies IPA50R350CPXKSA1

Overview

IPA50R350CPXKSA1 from Infineon Technologies is a 500 V, 11.5 A continuous drain current, 350 mΩ R_DS(on) silicon N-channel power MOSFET in TO-220FP package, optimized for hard-switched SMPS, adapter, and industrial offline power supplies with high efficiency and low conduction loss.

For engineers reviewing the IPA50R350CPXKSA1 datasheet, IPA50R350CPXKSA1 pinout, IPA50R350CPXKSA1 application, or IPA50R350CPXKSA1 equivalent, key selection criteria include R_DS(on) at 10 V gate drive, 500 V V_DSS rating, thermal resistance (R_thJC = 1.4 K/W), pulsed drain current capability (I_DM = 46 A), and lead-free RoHS-compliant packaging.

Technical Context

This MOSFET employs Infineon's CoolMOS™ C7 technology, featuring superjunction structure for reduced specific on-resistance and improved figure-of-merit (R_DS(on) × Q_g). It supports both hard-switching and soft-switching topologies with fast turn-on/turn-off times (t_on = 19 ns, t_off = 42 ns) and low gate charge (Q_g = 28 nC).

Designed for primary-side switching in AC-DC converters up to 150 W, it delivers low conduction losses at full load and reduced switching losses during light-load burst-mode operation. Its 500 V breakdown voltage accommodates line surges in universal-input 85–265 V_AC applications without derating.

Key Specifications

Pinout & Package

IPA50R350CPXKSA1 is housed in a TO-220FP (Full-Pak) package with insulated tab, enabling direct heatsink mounting without insulating washer. The plastic body provides creepage/clearance compliance for reinforced isolation in Class II designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP5NK50ZFP and IPP60R099C7XKSA1, IPA50R350CPXKSA1 offers optimal balance of R_DS(on), voltage rating, and package thermal performance for 65–120 W offline converters-delivering measurable efficiency gain over the former and better cost-efficiency ratio than the latter.

Availability

IPA50R350CPXKSA1 is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial AC-DC power supplies, and LED driver power stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for IPA50R350CPXKSA1 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 security solutions, with leadership in silicon and wide-bandgap power devices.

This device belongs to the CoolMOS™ C7 family, engineered specifically for high-efficiency, high-power-density offline SMPS in consumer, industrial, and lighting applications where low R_DS(on) and fast switching are critical.

FAQ

What is the maximum allowable case temperature for continuous operation?

The IPA50R350CPXKSA1 has a maximum junction temperature of 150 °C. With R_thJC = 1.4 K/W and typical heatsink interface resistance, sustained case temperature must remain ≤115 °C to maintain 35 °C safety margin under worst-case ambient and power dissipation conditions. Derating curves in the datasheet specify linear reduction of I_D above 25 °C case temperature.

Is a gate resistor required, and what value is recommended?

Yes-a gate resistor is mandatory to dampen ringing and limit peak gate current. For standard 12 V gate drive and typical PCB layout, a 10 Ω to 22 Ω non-inductive resistor is recommended. Lower values improve switching speed but increase EMI risk; higher values reduce EMI but raise switching losses. Layout-dependent optimization is advised using oscilloscope measurement of gate waveform overshoot.

Can this MOSFET be used in synchronous rectification configurations?

No-IPA50R350CPXKSA1 is an N-channel enhancement-mode MOSFET intended for high-side or primary-side switching only. It lacks the integrated Schottky diode or logic-level gate threshold required for secondary-side synchronous rectification. Dedicated SR controllers paired with logic-level MOSFETs (e.g., IRF7832) are needed for that function.

Does the TO-220FP package require electrical isolation from the heatsink?

Yes-the TO-220FP package features an electrically active drain-connected metal tab. Direct mounting to a conductive heatsink creates a short between drain and chassis ground unless an isolating pad (e.g., mica or polymer film) and shoulder washers are used. Insulated mounting hardware is mandatory for safety-critical Class I or Class II isolation compliance.