Heavily efficient

The TM4 SUMO HD is an electric powertrain system designed to interface with standard rear differentials without the need for an intermediate gearbox.

Its direct drive / gearless approach makes it the perfect match for any heavy-duty platforms and commercial vehicles applications.

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Motor features

  • High-voltage permanent magnet motors
  • High torque and power density
  • Low electro-magnetic audible noise
  • Low-cogging and ripple torque for better NVH
  • Four-quadrant operation
  • Thermal protection


Inverter features

  • 9-phase inverter
  • Variable switching frequency
  • High efficiency
  • EMI filter
  • Best-in-class power density

The direct-drive advantage

TM4 SUMO high torque motors can interface directly with standard rear differential without the need for an intermediate gearbox.

A direct drive system allows for the following benefits:

  • High reliability: removing the gearbox means removing the most mechanically complex and maintenance intensive part of the vehicle
  • Easy to fit between the H beam of the truck or in the engine bay of the city bus: no need to modify the vehicle architecture
  • Low maintenance: Dana TM4 direct-drive motors require no maintenance
  • Fast ROI



  • System protection:  IP 6K9K
  • Max coolant temperature: 65°C
  • Coolant type: 40/60 water-glycol
  • Toxic materials and flammability: ROHS, ELV, UL94-V0
  • External corrosion resistance: Salt spray, gravel, chemical products

Software features

  • Sinusoidal motor current
  • Temperature sensing for system derating and alarms
  • Advanced diagnostic capabilities (TM4 ODIN)
  • Communication fault detection
  • CAN 2.0b communication interface
  • Torque or speed control
  • DC voltage control available upon request
  • Advanced control algorithm for optimal system power and efficiency


motor: 340 kg
inverter:  36 kg

motor: 505 x 572 x 505 mm
inverter:  414 x 125 x 801 mm

Performance curves

Technical specifications

Peak power (kW)250250370
Continuous power (kW)195195260
Operating speed (RPM)0-33750-24500-3400
Continuous torque (NM)206020601970
Peak torque (NM)270034003445
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Optimized for Commercial Vehicles

Need help selecting the right powertrain ?

Dana TM4’s application engineering team can support you with powerful simulation tools that,
based on the vehicle target requirement, define the perfect motor choice
for the best results in terms of power, efficiency, size and cost.



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