OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
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OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company
OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company

OEM High Sensitivity SJKM3L ELCB Earth Leakage Circuit Breaker - Reliable China Suppliers & Factory for 230V/415V AC Systems Factory, Company

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Introducing the SJKM3L ELCB Earth Leakage Circuit Breaker, a top-notch solution for 230V/415V AC systems (50/60Hz), specifically designed for industrial and commercial applications. Made by reliable China suppliers, this ELCB features adjustable residual currents ranging from 30mA to 500mA and offers dual trip modes—non-delayed and time-delayed. Available in 125A and 160A ratings with 2P, 3P, and 4P configurations, this product ensures high performance with an impressive insulation level of 800V and a breaking capacity of up to 50kA. As a trusted factory product, it complies with IEC60947-2 standards, integrating thermal-magnetic tripping, isolation functionality, and effective motor/distribution protection into a compact design. The SJKM3L ELCB is engineered for reliable ground-fault detection and boasts mechanical endurance of up to 40,000 cycles, making it the ideal choice for enhancing safety in any electrical installation.

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Product Description

Type Designation
SJKM3L-1 Type Designation
1Technical Parameters
2Mounting Holes
3Product Model
4Breaking Capacity
5Compliance Standards
6Manufacturer Name
7Trip Button
8Certification Mark
9Circuit Breaker with Isolation Function
10Manufacturer Logo
11Rated Current
12Rated Residual Operating Current
13Ultimate Non-operating Time
14Earth Leakage Indicator Button
15Earth Leakage Test Button
16Close, 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 62*150*72 75*165*74
3P 92*150*93.5 107*165*94
4P 122*150*93.5 142*165*94
SJKM3L Series Overcurrent Characteristic Curve Diagram
SJKM3L-4 Overcurrent Characteristic Curve 1

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

SJKM3L-5 Overcurrent Characteristic Curve 2

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

Operating Principle Diagram
SJKM3L-6 Operating Principle Diagram
SJKM3L Series Plug-in Front/Rear Panel Hole Position Diagram
SJKM3L-7 Plug-in Hole Position Diagram
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
Frequently Asked Questions (FAQ)
Q1: What is the SJKM3L series Earth Leakage Circuit Breaker used for?
The SJKM3L series Earth Leakage Circuit Breaker (ELCB) is designed to provide simultaneous overcurrent protection and earth leakage protection for electrical systems. It is suitable for distribution panels and motor circuits, protecting against short circuits, overloads, and ground faults.
Q2: What rated current options are available for the SJKM3L-125 model?
The SJKM3L-125 model is available in rated current (In) options of 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, and 125A, covering a wide range of application needs.
Q3: What are the available residual operating current (I△n) settings on the SJKM3L series?
The SJKM3L series offers 3-step adjustable residual operating current settings. For the non-delayed type, options include 30mA/100mA/300mA or 100mA/300mA/500mA. For the time-delayed type, the available settings are 100mA/300mA/500mA.
Q4: Does the SJKM3L series support modular accessories and isolation function?
Yes, both the SJKM3L-125 and SJKM3L-160 models support modular accessory installation and are equipped with an isolation function, making them suitable for safe maintenance and disconnection operations.
Q5: What connection methods are supported by the SJKM3L series?
The SJKM3L series supports three connection methods: Fixed Front Terminal Connection, Fixed Rear Terminal Connection (not available for 2P), and Plug-in Rear Terminal Connection (not available for 2P), providing flexible installation options for different panel configurations.
Q6: What is the breaking capacity of the SJKM3L series at 415V?
At 415V, the SJKM3L series offers three breaking capacity levels: Standard (C) with Icu of 20kA and Ics of 12kA; High (S) with Icu of 35kA and Ics of 21kA; and Extra High (F) with Icu of 50kA and Ics of 30kA. This applies to both the SJKM3L-125 and SJKM3L-160 frames.

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