CM50TF-24H Mitsubishi 1200V 50A 6-Pack IGBT Module: Technical Overview and Applications

CM50TF-24H Mitsubishi 1200V 50A 6-Pack IGBT Module

The CM50TF-24H is a three-phase bridge IGBT module rated at 1200V and 50A, engineered for low conduction losses and high thermal reliability in motor drive systems. By utilizing an integrated six-pack topology, this module simplifies inverter designs and minimizes stray inductance. Key specifications include a 1200V collector-emitter voltage, 50A collector current, and 2500VAC isolation voltage. Engineers looking for robust power conversion solutions will find this module offers a balance of switching efficiency and thermal dissipation. Download official datasheet (PDF).

Technical Analysis and Electrical Characteristics

The CM50TF-24H features a collector-emitter saturation voltage (V_CE(sat)) typically rated at 2.8V (at I_C = 50A and V_GE = 15V). This low saturation voltage directly limits conduction losses during continuous operation. You can think of the saturation voltage like the pressure drop across a fluid valve. A smaller drop means less energy is lost as heat, keeping the system running cooler and more efficiently.

Thermal management is supported by a copper baseplate, which optimizes the heat path to the external heatsink. The junction-to-case thermal resistance (R_th(j-c)) is restricted to 0.35°C/W for the IGBT portion. This efficient heat transfer prevents localized hot spots. This construction relies on isolated baseplates to ensure high dielectric isolation between the electrical terminals and the thermal cooling assembly.

Additionally, the module features a gate-emitter threshold voltage range between 6.0V and 7.5V. This provides clean, noise-tolerant switching. Proper gate drive design is required to control the switching transient behavior. This control is critical for managing the overall IGBT switching performance and preventing parasitic turn-on events.

Target Industrial Applications

This 6-pack module is frequently chosen for the following configurations:

• AC Motor Controllers: The 1200V rating allows safe operation in 400V/480V three-phase grid systems.
• Uninterruptible Power Supplies (UPS): Inverters in UPS systems benefit from the integrated bridge topology to reduce space.
• Servo Inverters: The 50A rating provides sufficient current capability for medium-power dynamic positioning drives.

Best Match: Three-phase inverters operating up to 480VAC requiring continuous output currents under 50A and high electrical isolation.

Key Specifications Table

Parameter	Symbol	Rating / Condition	Unit
Collector-Emitter Voltage	VCES	1200	V
Collector Current (DC)	IC	50	A
Collector Dissipation	PC	350	W
Collector-Emitter Saturation Voltage	VCE(sat)	2.8 (Typ) / 3.7 (Max) at 50A	V
Isolation Voltage	Viso	2500 (AC, 1 minute)	V
Junction Temperature Range	Tj	-40 to +150	°C

Engineer FAQs

What is the benefit of the integrated 6-pack topology in the CM50TF-24H?

The six-pack configuration houses all six switches of a three-phase bridge inverter inside one housing. This configuration reduces stray inductance compared to discrete designs and simplifies busbar routing.

How do you prevent voltage overshoot during turn-off?

Using a snubber circuit close to the DC bus terminals is recommended. This minimizes parasitic loop inductance, which prevents overshoot and reduces the risk of preventing latch-up failures.

What is the isolation rating of the heatsink interface?

The baseplate is electrically isolated from the internal semiconductor chips, with an isolation rating of 2500VAC for 1 minute. This allows multiple modules to share a single heatsink without extra insulating pads.

Conclusion

The CM50TF-24H provides a reliable solution for medium-power industrial inverter designs. Its low conduction losses, integrated layout, and high isolation voltage enable compact and thermally stable power conversion systems.