WashiON KYORITSU KEIKI CM8 Type DC Contactor

Manufacturer: WashiON KYORITSU KEIKI
Model: CM8 Type

Features

Built for bidirectional switching of DC motors.
Supports variable speed regulation of DC motors.
Applicable to battery-operated vehicles such as:
Forklift trucks
Pallet lifters
Stationary platform carriers

Main contact rated voltage			DC 48V
Main contact rated current			80A continuous
Main contact arrangement			1A		1T
Main contact capacity		Condition	Making	Breaking	Time constant	No. of times
		Make & break capacity	1000 A	1000 A	L / R = 15 ms	125 times
		Rated operating current ※1	320 A	80 A	L / R = 10 ms	500,000 times
Switching frequency			1200 times / hour
Coil		Voltage	DC 12V	DC 24V	DC 48V
	Continuous 8H	Current	1.58 A	0.79 A	0.39 A
		Resistance	7.6 Ω	30.3 Ω	121.0 Ω
		Power consumption	19 W
	Chopper f=1 msec 50%ED	Current	2.5A[5.0A]	1.25A[2.5A]	0.63A[1.25A]
		Resistance	2.4 Ω	9.6 Ω	38.4 Ω
		Power consumption	15W (for chopper control) / 60W (for continuous conduction)
		Insulation class	B class
Min. pickup voltage			70% or below of rated voltage (hot coil)
Release voltage			5% ~ 30% of rated voltage
Insulation resistance			5MΩ or above (DC500V megger)
Withstand voltage			AC 1500V 50 / 60 Hz One minute
Ambient temperature			−20°C ~ +60°C (no condensation)
Relative humidity			45% ~ 85% RH
Vibration resistance (X, Y, Z directions)			6G in excited state		5G in non-excited state
Shock resistance (X, Y, Z directions)			8G in excited state		4G in non-excited state
Mechanical life			5 million times
Electrical life			500,000 times (when used under condition of ※1)
Weight			0.75 kg

[*1]The making and breaking current capacities apply to contact A of all models, and the electrical life to contact A for load switching.
[*2]Beware that contact B is capable of conducting only and not breaking.
[*3]The current and resistance values of the coil represent those at an ambient temperature of +20°C, and the tolerance on them is ±10%.
[*4]The minimum pickup voltage represents that at an ambient temperature of +60°C and hot coil start.

♦Relationship between Current, Max.On Time and Duty Cycle

Duty cycle	5% ED	10% ED	25% ED	50% ED	75% ED	100% ED
Current	400 A	240 A	170 A	140 A	110 A	80 A
Max. ON time	30 sec	60 sec	140 sec	300 sec	600 sec	Continuous
OFF time	570 sec	540 sec	420 sec	360 sec	200 sec	—

[*1]Use 46 to 55 kg·cm as the tightening torque of the main circuit terminal (M6).
[*2]Connect the positive pole (+) to the terminal marked with the main circuit polarity marking P.
(The contactor structure is such that arc is led out front by a built-in magnet.)
[*3]Install the DC contactor with the UP side up.
[*4]Provide a space of 5 mm or more between contactors when two or more contactors are to be installed side by side.