SJKS1D Series Surge Protection Device 1P-4P 50Hz

This SJKS1D series surge protection device (SPD) safeguards electrical systems against lightning and transient surges, with no need for power shutdown during unit replacement. Rated for 420V continuous operation, it handles up to 20kA (8/20μs) peak currents and responds in under 25ns for ultra-fast protection. A clear visual indicator shows green for normal operation and red for faults. Available in 1P–4P modular units, it fits standard 35mm DIN rails and works reliably from -40°C to +85°C, ideal for industrial, commercial, and residential applications.

product details

Type Designation

1	Surge Protective Device (SPD)
2	Class D Protection
3	Maximum Discharge Current Imax (kA)
4	Number Of Poles: 1P, 2P, 3P, 4P, N+PE
5	Maximum Continuous Operating Voltage Uc (V)

Product Features

- Protector unit can be replaced without power interruption.
- Withstands lightning current surges up to 20kA (8/20μs).
- Response time: < 25 ns.
- Visual indicator window shows protection status: Green = Normal, Red = Fault.

product Display

Technical Parameters

Parameter	SJKS1-10	SJKS1-20
Maximum continuous operating voltage Uc (V~)	420V
Voltage protection level Up (V~, kV)	≤1.0	≤1.2
Nominal discharge current In (8/20μs, kA)	5kA	10kA
Maximum discharge current Imax (8/20μs, kA)	10kA	20kA
Response time (ns)	<25
Connection cross-section L/N (mm²)	6mm²
Connection cross-section PE (mm²)	10mm²
Recommended fuse / breaker rating (A)	10A, 16A
Operating temperature (°C)	-40°C ~ +85°C
Relative humidity (at 25°C)	≤95%
Mounting	Standard 35mm DIN rail
Housing material	Glass fiber reinforced plastic

Outline Dimensions and Installation Size

Here’s the standardized English version for your SJKS1D Series Surge Protection Device, including common dimensions based on DIN rail SPD form factors:

Poles	Width	Height	Total Depth	Mounted Depth	Housing Height	DIN Rail Width
1P	18	90	62	50	45	35
2P	36	90	62	50	45	35
3P	54	90	62	50	45	35
4P	72	90	62	50	45	35