Molded Case
Motor Circuit


EX9 Series - M Molded Case Motor Circuit Protectors,
3~1200 Amperes

NOARK Electric offers a complete range of 3 pole Molded Case Motor Circuit Protectors
(MCPs, magnetic only) which are used to protect the three phase asynchronous motors in six frame sizes: M1M – 150 A, M2M – 250 A, M3M – 400 A, M4M – 600 A, M5M – 800 A, and M6M – 1,200 A.

Each frame size offers a range of interrupting voltage ratings from 240-690 Vac.
This series MCP conforms to global standards that include UL 489, CSA C22.2 No 5 and IEC

The traditional system used for this purpose is based on three different devices: a circuit
breaker for protection against short-circuit, a thermal relay for protection against overload
and phase loss or unbalance of phase, and a contactor for motor switching.

In particular, when selecting these devices, different factors must be taken into consideration, such as:

  • The rated motor power
  • The type of motor: with cage rotor or with wound rotor
  • The fault current at the point of the network where the motor is installed


  • UL 489 Recognized, File Number E355392
    (Standard for connection terminals which allows the user to apply field wiring directly to the breaker)
  • In compliance with CSA standards 22.2 No. 5
  • IEC/EN 60947-2
  • CE Compliant
  • RoHS Compliant
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