Skip to main content

All locations

Please select your country & language

China | 中国
Germany | Deutschland

Your country is not in the list?

Go to our international website:

Mersen EP International website
Country / Language:  USA / English
Contact us

Approvals & Standards

  • UL 508 listed E196672
  • IEC 60947-3

Key features & benefits

The M-series Load Break Switch is the most compact industrial-grade switch on the market. Capable of making or breaking loads up to 600V (UL), it is suitable as a motor disconnect. Extremely compact and robust, these switches have a variety of mounting options including DIN-rail, base, or door-mounting. A wide assortment of handles, shafts and accessories is available to accommodate any installation requirement.

More specifications


  • Line-of-sight disconnect
  • Electrical isolation
  • Branch-circuit switch
  • Motor disconnect

Product Specifications

Item Number


Item Description (ERP)

IEC UL508 Switch 40A 3p  

Short Description

UL508 Non-Fused Disconnect 600V 40A 3 Pole  



Rated voltage AC UL

600   V

Rated voltage DC UL

0   V

Ampere Rating

40   A

ROHS Compliant


Short Circuit Current Rating (SCCR)

Up to 100 kA with fuses  

Short Circuit Rating (Class J)

10 kA w/60A   kA

Short Circuit Rating (Class RK5)

5 kA w/60A   kA

Number of Poles


Wiring range


Connection/Terminal Type


Max Horsepower Rating/FLA

3-Phase: 240V 10HP, 480V 20HP, 600V 25HP; 1-Phase 120V 2HP, 240V 5HP  

Rated Insulation Voltage

750   V

Installation Mounting

Direct Screw Mount  

Product Weight

0.24   lb

Product Width

1.38   in

Product Length

2.13   in

Product Height

1.77   in

Sell Pack Quantity

1   Each

Sell Pack Width

2.64   in

Sell Pack Length

1.81   in

Sell Pack Height

3.11   in