Flight Heritage since 2013

ISIS Magnetorquer Board


  • Three-axis magnetometer
  • Three actuators; two torque rods and one air core torque.
  • Current sensors for each torque
  • Temperature telemetry of actuators
  • Nominal 0.2Am2 actuation per actuator
  • Suitable to detumble up to 12U (~24kg) CubeSats
  • Applications
    • CubeSat detumbling & magnetic attitude control
    • Reaction wheel desaturation
  • Interface

Option Sheet

Availability: 8 – 12 weeks

  • Description
  • Product properties
  • Performance
  • Options
  • Qualification and acceptance testing


The ISIS MagneTorQuer board (iMTQ) is a PCB based 3-axis magnetic system. It is designed to provide maximum flexibility in placing actuators and magnetometer in a CubeSat structure. Providing actuation of 0.2Am2, the system can be placed in a stack or in between stacks in ISIS cubesat structures. The magnetorquer board can be controlled over digital or analog interface, and provides telemetry over I2C.

Product properties

  • Mass: ~196 grams
  • Qualified operational temperature range: -40 to +70°C
  • Dimensions (l x w x h): 95.9 x 90.1 x 17 mm3
  • Supply voltage: 5V


  • Actuation level
    • Nominal: 0.2 Am2 (@ 20°C, 5V)
  • Power consumption (@ 20°C)
    • No actuation: 175 mW
    • Full actuation (3-Axis): <1.2W
  • Maximum actuation envelope error: <5%


  • External magnetometer (extra lead time)
  • I2C control level command, with automatic current sensing and temperature correction
  • Direct analog control of actuators with direct PWM signal

Qualification and Acceptance testing

Test QT AT
Mechanical Shock
Thermal Cycling
Thermal Vacuum

*QT is performed on the design/qualification model
*AT is performed on the unit to be shipped