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MCDR: Go-No Go AC Current Sensing Relay


• Self Powered

• 10 or 20 Amp Trip Points

• 100 Amps AC Overload

• 10 Amp Contact

• Stranded Wire Leads

• Large Wire Thru Hole

• DIN Rail Mountable

• Compact Design

• Low Cost




AC Current Sensing

The MCDR generates its own operating power from the monitored current line. No external power supply is needed. A current greater than the pick up current is required to energize the output relay. The output relay will stay energized until the current in the line being monitored drops below the drop out current level for the MCDR. Sensitivity can be increased with multiple passes through the MCDR CT(See table in connection diagram).




Input Supply Voltage: None Required

Pick-Up Range*: 10 or 20 Amps +5%, -25%

Pick-Up/Drop-Out Delay: 0.1 Sec.

Drop-Out Range: 2.5 Amps Minimum

Frequency: 47 to 63 Hz

Maximum Current Range:

    100 Amps Continuous

    150 Amps 1 Minute Max

Reset: Automatic

Output Rating 1 FORM C @ 25°C:

    10 Amps @ 120VAC

     6 Amps @ 250VAC,

     5 Amps @ 30VDC

     300W (D.C.) 1600VA (A.C.) Max. switching power (resistive)

     100,000 Full Load Electrical Cycles


* Other currents available. Consult factory.


Maximum Load Wire Diameter: 0.7” Dia.

Mounting: Surface, #6 Screw

Termination: Screw Terminals

Packaging: Epoxy Filled

Weight: 6 Oz.


Ambient Temperatures

Operating: 0°C to 40°C

Storage: -40°C to 85°C


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