NOARK Molded Case Motor Circuit Protectors

Noark Molded Case Motor Circuit Protector Diagram with Labels
Noark Molded Case Switch Accessories Diagram With Labels
Noark Molded Case Switch Product Selection Guide
Product Selection Guide
  • UL 489 Listed, File Number E355392

  • Certified for Canada CSA standards 22.2 No. 5 under cUL testing

  • IEC/EN 60947-2

  • CE Compliant

  • UL489B, File Number E513573

Certification mark featuring 'cULus' with the 'UL' in a circle and 'LISTED' below, indicating the product is UL-certified for safety in both Canada and the United States.

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 60947-2.

The traditional system used for this purpose is based on three different devices: a circuit breaker for protection against short circuits, 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