• Product name: KS24 Three-phase SSR AC Output
  • Product number: KS24 Three-phase SSR AC Output
  • Control Voltage: 4~32VDC
  • Load Voltage: 380VAC 480VAC
  • Load current: 10A 15A 25A 40A 50A 60A
  • Installation: Panel Mounting

● Photoelectric isolation

● LED status indicator

● Dielectric strength 4000V

● Zero-cross or random turn-on

● Built-in RC snubber circuit

● Removable protective cover available

● Panel mounting

The KS24 is a three-phase AC output relay (3PST-NO).The relay offer (4~32)VDC input control, with (48~530)VAC output voltage and outputs current at 10A, 15A, 25A, 40A or 60A and etc.This relay includes a LED indicator to provide input status information. There is a neutral terminal in phrase loss protection KS24 product to realize corresponding function. This product is used in three-phase motors, heaters and other controls. 4000VAC optical isolation between input and output. Switching modes are divided into zero cross turn-on type and random turn-on type.

Input Parameters (Ta=25℃)

Control voltage range (4 ~ 32)VDC
Must turn-on voltage 4VDC
Must turn-off voltage 1VDC
Max. input current 35mA
Max. reverse protection voltage -32VDC


Output Parameters (Ta=25℃)

Load voltage range D-38: (48 ~ 440)VAC
D-48: (48 ~ 530)VAC
Max.load current D-38Z10: 10A
D-38Z15: 15A
D-38Z25: 25A
   D-口口Z40: 40A
D-48Z50: 50A
D-48Z60: 60A
Max.transient voltage D-38: 800Vpk
D-48: 1200Vpk
Frequency range (47 ~ 63)Hz
Max.surge current (10ms) D-38Z10: 100Apk
D-38Z15: 150Apk
D-38Z25: 250Apk
    D-口口Z40: 400Apk
D-48Z50: 500Apk
D-48Z60: 600Apk
Max.I2 t for fusing(10ms) D-38Z10: 50A2s
D-38Z15: 112A2s
D-38Z25: 312A2s
   D-口口Z40: 800A2s
  D-48Z50: 1250A2s
 D-48Z60: 1800A2s
Max.on-state voltage drop 1.7Vr.m.s.
Min.load current 100mA
Max.off-state leakage current 10mA
Min.off-state dv/dt D-38: 200V/us
D-48: 500V/us
Max.turn-on time Zero cross:1/2cycle + 1ms
Max.turn-off time 1/2cycle + 1ms
Min.power factor 0.5


GENERAL (Ta=25℃)

Dielectric strength (input to output) 4000VAC, 50Hz/60Hz, 1min
Insulation resistance 1000MΩ(500VDC)
Max.capacitance (input to output) 10pF
operating temperature -30 ~ 80
Storage temperature -30~ 100
Ambient humidity 45% ~ 85% RH
Termination Screw
Mounting model Panel mounting
Unit weight Approx 315g



Relay load current 10A 15A 25A 40A 50A 60A
Motor power 0.75kW 1.1kW 1.5kW 3kW 4kW 5kW
Heatsink part number HF92B-150A HF92B-150C
Cooling fan air flow 115CFM

1. The product datasheet shows the non-repetitive peak value of the surge current. Normally,use 1/2 of the non-repetitive peak surge current as the standard value. If the actual surge current may exceed the standard value,connect semiconductor fuses(such as Xi'an Kaiert's KS series product) to the SSR power side in series is required. At the same time, I2t value of semiconductor fuses should be smaller than the SSR norminal value
2. If the load may generate high shock voltage(such as motor), make sure that the SSR can withstand this transient voltage.
3. The product datasheet shows the non-repetitive peak value of the transient voltage. In practice, if the transient voltage may be larger than nominal value, a varistor should be mounted to the load terminal in parallel to prevent the SSR breakdown. The recommended varistor voltage range(750~1000)V.
4. For phase loss protection SSR, when three-phase power supply occurs phase missing (lack of one phase or two phases) or phase voltage are extremely unblanced, the SSR would turn off the output current and the input LED indicator and then run into the self-locking state. We need to cut off the input power to reset relay. Using this kind of product, L1.L2.L3.N. ternimals should connect with three phase power, U.m. ternimal should connect with three phase load, otherwise phase loss protection function does not work.
5. Please pay more attention to actual load current and ambient temperature for SSR selection. When the SSR is used for full load operation, we'd better 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. 6. Tighten the SSR terminal screws properly. If the screws are loose, the SSR will be damaged by heat generated from connections. Also excessive mounting torque may damage relay internal components. Recommended screw mounting torque as follows: output screw mounting torque range is(0.98~1.37)N.m, input screw mounting torque range is(0.58~0.98)N.m.
7. It's recommended to use the matched heatsink by Jinxinrong. If the user needs to use home-made heatsink, it's needed to ensure that the SSR base temperature does not exceed 85.
8. Since the SSR internal electronic components are assembled to a whole body by filling epoxy resin, excessive baseplate mounting torque may damage internal components. Therefore, we recommend using (0.98 ~ 1.37)N.m torque to fix the SSR.
9. Please do not use the relay beyond the descriptions in the datasheet.If it is a must to use it beyond descriptions, please contact Jinxinrong for more technical support.

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