1.2kV 260A three-phase silicon carbide power module

Rhopoint Components is to supply a 1.2kV 260A three-phase silicon carbide power module for electric vehicles.

Rhopoint Cissoid CMT-PLA3SB12340A silicon carbide power module

Made by Cissoid and called CMT-PLA3SB12340, it can supply its 26A at 90°C, and up to 340A at 25°C.

This is a complete power module, including output-to-baseplate (5kVdc for 1min) and input-to-output (3kV for 1min) isolation, power supplies to feed the secondary side gate drivers and fault flags back to the input side. Claimed common-mode transient immunity is >50kV/µs.


All that is needed is a 12V to +18V power supply and six PWM signals.


“Reference designs and bench-top or on-board packaging are available to shorten new product development lead-times,” said Rhopoint. “Cissoid has been a leader in power semiconductor solutions since 2011, delivering multi-phase, high-current power switching modules, motor control systems and software, across a wide range of power requirements.”

The unit measures 104 x 154 x 34mm and 550g.

On resistance is typically 3.25mΩ, and operation is over -40 to +175°C. Three emperature sensors are included.

Operation is at between 20 and 50kHz (with temperature caveats).

The baseplate is aluminium silicon carbide, contribution to the junction to baseplate thermal resistance of 0.183°C/W

Use is envisaged in cars, busses, trucks, e-boats and e-aviation, as well as in industrial motor drives.

The Rhopoint CMT-PLA3SB12340 web page can be found here

Earlier this month, Cissoid announced an agreement with power train company Edag Group to develop complete SiC traction inverters for electric mobility.

Rhopoint Components is based in East Grinstead, UK.

Steve Bush

Steve Bush is the long-standing technology editor for Electronics Weekly, covering electronics developments for more than 25 years. He has a particular interest in the Power and Embedded areas of the industry. He also writes for the Engineer In Wonderland blog, covering 3D printing, CNC machines and miscellaneous other engineering matters.

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