SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity

The SJKM3L ELCB Earth Leakage Circuit Breaker provides advanced protection for 230V/415V AC systems (50/60Hz), with adjustable residual currents (30mA–500mA) and dual trip modes (non-delayed/time-delayed). Available in 125A/160A ratings and 2P/3P/4P configurations, this ELCB features 800V insulation, high-breaking capacity (up to 50kA), and modular accessory compatibility. Compliant with IEC60947-2, it combines thermal-magnetic tripping, isolation functionality, and motor/distribution protection in a compact design. Ideal for industrial/commercial applications, the SJKM3L ELCB ensures reliable ground-fault detection with mechanical endurance up to 40,000 cycles.

product details

Type Designation

1	Technical Parameters
2	Mounting Holes
3	Product Model
4	Breaking Capacity
5	Compliance Standards
6	Manufacturer Name
7	Trip Button
8	Certification Mark
9	Circuit Breaker with Isolation Function
10	Manufacturer Logo
11	Rated Current
12	Rated Residual Operating Current
13	Ultimate Non-operating Time
14	Earth Leakage Indicator Button
15	Earth Leakage Test Button
16	Close, Trip, Open

product Display

SJKM3L Earth Leakage Circuit Breaker (6)

SJKM3L Earth Leakage Circuit Breaker (4)

SJKM3L Earth Leakage Circuit Breaker (2)

SJKM3L Earth Leakage Circuit Breaker (5)

SJKM3L Earth Leakage Circuit Breaker (3)

SJKM3L Earth Leakage Circuit Breaker (1)

Technical Parameters

		SJKM3L-125			SJKM3L-160
Rated Voltage Ue (V)		230(2P)/400/415			230(2P)/400/415
Rated Current In (A)		16/20/25/32/40/50/63/80/100/125			100/125/140/160
Rated Insulation Voltage Ui (V)		800			800
Rated Impulse Withstand Voltage Uimp (kV)		8			8
Number of Poles		2/3/4(A,B)			2/3/4(A,B)
Rated Residual Operating Current I△n mA (3-step adjustable)	Non-delayed Type	30mA,100mA,300mA			30mA,100mA,300mA
		100mA,300mA,500mA			100mA,300mA,500mA
	Time-delayed Type	100mA,300mA,500mA			100mA,300mA,500mA
Rated Residual Non-operating Current I△no mA		50%I△n			50%△n
Non-delayed Type: Tripping Time s		≤0.1			≤0.1
Fixed Delay: 2I△n Ultimate Non-operating Time s (Special Order)		0.1/0.2/0.3/0.4/0.5/1			0.1/0.2/0.3/0.4/0.5/1
Adjustable Delay: Ultimate Non-operating Time at 2I△n s (Standard)		Y1:0.1/0.2/0.3s			Y1:0.1/0.2/0.3s
		Y2:0.4/0.5/1s			Y2:0.4/0.5/1s
Breaking Capacity		C (3/4P)	S	F (3/4P)	C (3/4P)	S	F (3/4P)
	lcu(415V)	20	35	50	20	35	50
	Ics(415V)	12	21	30	12	21	30
Rated Residual Short-circuit Making Capacity I△m(kA)		25%Icu	25%Icu		25%Icu	25%Icu
Mechanical Endurance	With Maintenance	20000	40000		20000	40000
	Maintenance-free	10000	20000		10000	20000
Electrical Endurance at 400V		4000	8000		4000	8000
Modular Accessory Installation		■			■
Isolation Function		■			■
Protection Type		Distribution Protection			Distribution Protection
		Motor Protection (Not available for 2P)			Motor Protection (Not available for 2P)
Tripping Method	Thermal-magnetic Trip	■			■
	Magnetic-only Trip	■			■
Connection Method
Fixed Front Terminal Connection		■			■
Fixed Rear Terminal Connection (No 2P)		■			■
Plug-in Rear Terminal Connection (No 2P)		■			■
Dimension (mm)	2P	6215072			7516574
	3P	9215093.5			10716594
	4P	12215093.5			14216594

SJKM3L Series Overcurrent Characteristic Curve Diagram

Left Diagram: SJKM1LE-125 Time-Current Characteristic Curve(Motor)
Right Diagram: SJKM1LE-250 Time-Current Characteristic Curve(Motor)

Left Diagram: SJKM1LE-400 Time-Current Characteristic Curve(Motor)
Right Diagram: SJKM1LE-630,800 Time-Current Characteristic Curve(Motor)

Operating Principle Diagram

SJKM3L Series Plug-in Front/Rear Panel Hole Position Diagram

SJKM3L-7

Frame		Number of Poles	A	A1	B	B1	C	D
Plug-in Front Connection	125	3	/	30	/	110	/	5
		4
	160/250	3	/	35	/	150	/	5
		4
Plug-in Rear Connection	125	3	94	60	40	67	90	5.5
		4	124	90
	160/250	3	110	70	45	74	100	6.5
		4	145	105
	400	3	157	88	60	145	170	8.5
		4	205	132
	630	3	212	140	62	143	185	11
		4	282	210