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SJKM3E Electronic Circuit Breaker (ECB) - Smart Protection 16A-800A | China Suppliers & Factory Compliance

The SJKM3E Electronic Circuit Breaker (ECB) offers superior circuit protection for loads ranging from 16A to 800A at 400V/800V AC (50/60Hz), available in both 3P and 4P configurations. This industrial-grade ECB, compliant with IEC60947-2 and GB14048.2 standards, boasts an impressive 8kV impulse withstand capability and features a clearly visible OFF position for reliable isolation. Manufactured in China, our factory ensures that this ECB is built to withstand harsh conditions, operating effectively at altitudes up to 2000m (with derating) and is compliant with Pollution Degree III standards alongside IP20/IP40 protection. The SJKM3E ECB guarantees stable performance in environments of +40°C with 50% humidity (monthly maximum of 90%), making it an ideal choice for power distribution systems that demand precise protection and isolation safety. Trust our suppliers for high-quality electronic circuit breakers that meet international standards and provide exceptional reliability

Product Details

Type Designation

①	Product Type
②	Molded Case Circuit Breaker (MCCB) Designation
③	Design Code
④	Release Type
⑤	Frame Current Rating (A)
⑥	Breaking Capacity Class
⑦	Operation Mode
⑧	Number of Poles
⑨	Accessory Code

Release Mechanism Type and Internal Accessory Code

♦ Release Characteristics

With protection functions including overload long-time inverse time delay, short-circuit time delay inverse limit, short-circuit short-time delay fixed time limit, and short-circuit instantaneous action, users can set the required protection characteristics themselves. The neutral line overcurrent protection current and time parameters automatically track 100% of the phase line setting values. The release characteristics are shown in the following diagram.

口 Alarm Contact (NC)

■ Auxiliary Contact (NO+NC)

● Shunt Release

○ Undervoltage Release

→ Wiring Direction

Product Display

SJKM3E Earth Leakage Circuit Breaker (1)

SJKM3E Earth Leakage Circuit Breaker (3)

SJKM3E Earth Leakage Circuit Breaker (2)

SJKM3E Earth Leakage Circuit Breaker (4)

SJKM3E Series Front Panel Wiring

◆ SJKM3E-125 (L,M,H) Front Panel Wiring (2-pole, 3-pole, 4-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-6

◆ SJKM3E-125 (L,M,H) Insert Type Front Panel Wiring (3-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-7

◆ SJKM3E-250 (L,M,H) Front Panel Wiring (3-pole, 4-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-8

◆ SJKM3E-250 (L,M,H) Insert Type Front Panel Wiring (3-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-9

◆ SJKM3E-400 (L,M,H) Front Panel Wiring (3-pole, 4-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-10

◆ SJKM3E-400 (L,M,H) Insert Type Front Panel Wiring (3-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-11

◆ SJKM3E-630,800 (L,M,H) Front Panel Wiring (3-pole, 4-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-12

◆ SJKM3E-630,800 (L,M,H) Insert Type Front Panel Wiring (3-pole)

X-X, Y-Y are the centers of 3-pole circuit breaker SJKM3E-13

Frequently Asked Questions

What does the designation sequence of the SJKM3E represent?

The designation sequence represents the Product Type, Molded Case Circuit Breaker (MCCB) Designation, Design Code, Release Type, Frame Current Rating (A), Breaking Capacity Class, Operation Mode, Number of Poles, and Accessory Code.

What protection features does the SJKM3E release mechanism offer?

It offers overload long-time inverse time delay, short-circuit time delay inverse limit, short-circuit short-time delay fixed time limit, and short-circuit instantaneous action protection.

How does the neutral line overcurrent protection function?

The neutral line overcurrent protection current and time parameters are configured to automatically track 100% of the phase line setting values.

Which internal accessories are available for the SJKM3E series?

The internal accessories include Alarm Contacts (NC), Auxiliary Contacts (NO+NC), Shunt Releases, and Undervoltage Releases.

What wiring types are available for the SJKM3E series?

The series supports both standard Front Panel Wiring and Insert Type Front Panel Wiring configurations for various pole setups (2-pole, 3-pole, and 4-pole).