CM75RX-24S

Overview

The CM75RX-24S is a Six IGBTMOD™ + Brake NX-S Series power module manufactured by Powerex Inc. It integrates six IGBT transistors in a three-phase bridge configuration and a seventh IGBT with a free-wheeling diode for dynamic braking. The device features a collector-emitter voltage (VCES) of 1200 Volts, an inverter sector DC collector current rating of 75 Amperes at TC = 121°C, and a brake sector DC collector current rating of 50 Amperes at TC = 125°C. It includes an NTC thermistor with a zero-power resistance of 5.0 kΩ at 25°C. The isolation voltage between terminals and the baseplate is 2500 Vrms.

Feature Summary

• Integrates a three-phase inverter bridge with a dedicated dynamic braking circuit
• Features an isolated baseplate to simplify system assembly and thermal management
• Includes discrete super-fast recovery free-wheeling diodes
• Provides low drive power requirements and low saturation voltage

Applications

• AC Motor Control
• Motion/Servo Control
• Photovoltaic/Fuel Cell systems

Procurement Notes

Verify the specific revision status and manufacturing date code upon ordering, as component specifications may evolve. Confirm that the mounting torque for M5 screws aligns with the datasheet recommendation of 31 in-lb to ensure proper mechanical stability and electrical contact. Ensure the procurement channel provides traceable documentation matching the official Powerex part number CM75RX-24S.

Selection Notes

Select this module when a combined inverter and braking solution is required within a single package. Verify that the thermal design accommodates the junction-to-case thermal resistance of 0.25 K/W per IGBT and 0.4 K/W per FWDi. Ensure the gate drive circuit can supply the necessary total gate charge without exceeding the maximum gate-emitter voltage limits of ±20 Volts.

Part Context

This component belongs to the NX-S Series from Powerex, designed for high-efficiency switching applications. It represents a consolidated solution combining standard three-phase inversion capabilities with active dynamic braking, reducing the component count and board space typically required for separate braking resistor circuits in motor drive architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-referencing requires verifying pin compatibility, thermal resistance values, and electrical ratings against the original application requirements.