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Scope of Application

CJ20 AC contactor ( AC/DC contactor), mainly used in the circuit of AC 50Hz (or 60Hz), rated voltage to 660V, rated operating current to 630A, for long-distance making and breaking circuit, and combination with the appropriate thermal overload relay, to protect the circuit that operation may overload. AC/DC contactor meets standards of IEC60947-4-1, GB14048.4.

Model and meaning

Normal operating conditions and installation conditions

Ambient air temperature: -5℃~+40℃, the average does not exceed +35℃ within 24 hours.
Altitude: not more than 2000m.
Atmospheric conditions: the maximum temperature is +40℃, the relative humidity is not more than 50%; at lower temperatures can allow a higher relative humidity, for example, +20℃ up to 90%, special measures should be taken for condensation produced occasionally due to temperature changes.
Pollution level: 3.
Installation category: Ⅲ.
Installation conditions: The inclination of the installation surface and the vertical plane is not more than ±5°.
Shock Vibration: The AC/DC contactor should be installed and used in the place without significant shaking, shock and vibration.

Main parameters and technical performance

Coil rated control supply voltage Us is: AC 50Hz, 110V, 127V, 220V, 380V; DC: 110V, 220V
Mechanical life: CJ20-10,16,25,40,63,100,160 for the 10 million times, CJ20-250,400,630 for the 6 million times.
Saving rate of energy-saving AC/DC contact(see Table 1).

Table 1





Saving rate %




Main parameters and technical performance of contactor (see Table 2).

Table 2

Model Rated insulation voltage

Conventional free air

heating current Ith(A)

Maximum power of

three phase squirrel

cage motor controlled by

AC-3 kW

Number of operating

cycles per hour

Electrical life
(10000 times)
Coil power
Start / Hold
Selection of fuses
(SCPD) models
220V 380V 660V
CJ20-10 690 10 2.2 4 4 1200 100 65/9 RT16-20
CJ20-16 16 4.5 7.5 11 62/9 RT16-32
CJ20-25 25 5.5 11 13 93/14 RT16-50
CJ20-40 32 11 22 22 175/19 RT16-80
CJ20-63 40 18 30 35 120 480/57 RT16-160
CJ20-100 63 28 50 50 570/61 RT16-250
CJ20-160 100 48 85 85 855/85.5 RT16-315
CJ20-250 250 80 132 - 600 60 1710/152 RT16-400
CJ20-400 400 115 200 200 1710/250 RT16-500
CJ20-630 630 175 300 - 3578/91.2 RT16-630

Contact type, quantity and basic parameters of auxiliary contacts (see Table 3)

Table 3


Conventional free air

heating current(A)

Rated insulation voltage(V)

Rated operating


Rated operating


Rated control capacity

Types and number

of contact

CJ20-10~40 10 690 380 220 0.26 0.14 AC-15

Two normally open,

two normally closed

220 110 0.45 0.27
CJ20-63~160 10 380 220 0.80 0.27 AC-15

Two normally open,

two normally closed

220 110 1.4 0.6
CJ20-250~630 10 380 220 1.3 0.27 AC-15
normally open 4 3 2
220 110 2.3 0.6 normally closed 2 3 4

Wiring diagram

Structural features

Contact system of AC/DC contactor for the arrangement of direct-acting and double-break, auxiliary contact of CJ20-40A and more as separate component installed in the both sides of the main contact, is separation in the electrical.
CJ20-10~25A AC/DC contactors can be installed with screws or 35mm standard card rails.
CJ20-10~16A AC/DC contactors use a double breakpoint simple opening arc chamber, and the rest use multi-longitudinal seam arcing cover or arcing cover enclosures, with high breaking capacity, high reliability.
CJ20-63~630 energy-saving AC/DC contactors have DC general power-saving module, not only can derive muffler energy-saving products or DC operation products, and do not take up auxiliary contacts, thus greatly improving product reliability and life.

Outline and installation dimensions

Keywords: CJ20 ,DC contactor,Din Rail Mounted Contactor

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