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  • Product name: KS33 Single-Phase SSR DC output
  • Product number: KS33 Single-Phase SSR DC output
  • Control Voltage: 3~32VDC 4~32VDC
  • Load Voltage: 30VDC 50VDC 100VDC 150VDC 200VDC 400VDC 500VDC
  • Load current: 7A 10A 12A 20A 40A 50A 80A 100A
  • Installation: Panel Mounting

  • MOSFET output
  • Photoelectric isolation
  • Low on-state resistance
  • Dielectric strength 2500V
  • Panel mount
  • Input DC control

KS33 is a set of SPST-NO type DC output solid state relays, using common panel mounting, offer (3 ~ 32)VDC input control and use MOSFET output. It is available with switching current 50A at 30V, 100A at 30V, 40A at 50V,80A at 50V, 20A at 100V, 40A at 100V, 80A at 100V, 50A at 150V, 10A at 200V, 40A at 200V, 10A at 400V, 7A at 500V and 12A at 500V etc.It is optical isolation between input and output, dielectric strength 2500VAC.

Input Parameter(Ta = 25℃)


Control voltage range (3 ~ 32)VDC (Without LED)
(4 ~ 32)VDC(With LED)
Must turn-on voltage 3 VDC (Without LED)
4 VDC(With LED)
Must turn-off voltage 1.0VDC
Max.input current 28mA (32VDC)
Max.reverse protection voltage -32VDC


Output Parameter (Ta = 25℃)

  D-30D□-□ D-50D□-□ D-100D□-□ D-150D□-□ D-200D□-□ D-400D□-□ D-500D□-□
50 100 40 80 20 40 80 50 10 40 10 7 12
Load voltage
(0~30)VDC (0~50)VDC (0~100)VDC  (0~150)VDC (0~200)VDC  (0~400)VDC (0~500)VDC
Load current
- 40A
- 80A
leakage current
0.1mA 0.1mA 0.1mA  0.1mA 0.1mA  0.1mA 0.1mA
voltage drop
 0.35V  0.35V  0.64V  0.64V  1.5V  1.5V  1.6V  0.6V  1V  1V  2.4V  1.9V  1.5V
 7mΩ  3.5mΩ  16mΩ  8mΩ  75mΩ  37.5mΩ  20mΩ  12mΩ  105mΩ  35mΩ  0.24Ω  0.26Ω  0.125Ω
 120Apk  240Apk  100Apk  200Apk  80Apk  160Apk  240Apk  200Apk  40Apk  130Apk  40Apk  30Apk  40Apk


GENERAL(Ta = 25℃)

Dielectric strength 2500VAC, 50Hz/60Hz, 1min, input,output to base
2500VAC, 50Hz/60Hz, 1min, input to output) 
Insulation resistance 1000MΩ(500VDC)
Vibration resistance  10Hz ~ 55Hz 1.5mm DA 
Shock resistance  980m/s2 
Operating temperature  -30 ~ 80
Storage temperature  -30~ 100 
Unit weight  Approx 100g 


1.Diode is a must for Inductive loads.
2.When choosing a SSR,please pay more attention to actual load current and ambient temperature. When the SSR is used for full load operation, we must install an adequate heatsink or take other effective cooling measures. When the ambient temperature is high, please refer to the curve of Max. Load Current vs Ambient Temperature for derating.

3.Apply heat-conducting silicon grease or a thermal transfer pad on the space between SSR and heat sink. Then, screw the heatsink firmly. In that case, it would keep the SSR from damaging by overheat.
4.Tighten the SSR terminal screws properly. If the screws are loose, the SSR will be damaged by heat generated from connections. Also, excessive screw mounting torque may damage relay internal components. We recommended screw installation torque as follows: M4 screw mounting torque of (0.98~1.37)N.m, M3 screw mounting torque of (0.58~0.98)N.m.
5.Please do not use the relay beyond the descriptions in the datasheet.

Download attachments : KS33

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