OEM SJKM8 Moulded Case Circuit Breaker MCCB Suppliers, Manufacturer

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OEM SJKM8 Moulded Case Circuit Breaker MCCB Suppliers, Manufacturer

The SJKM8 Moulded Case Circuit Breaker (MCCB) delivers reliable circuit protection for 50/60Hz systems with 690V insulation and current ratings from 100A to 630A. Available in 1P, 2P, 3P, and 4P configurations, this MCCB supports manual, fixed, and plug-in mounting options for versatile panel integration. Compliant with IEC60947-2 & EN60947-2, the SJKM8 MCCB ensures robust performance in industrial and commercial applications. Its durable design provides overload and short-circuit protection, making it ideal for power distribution systems requiring high breaking capacity. The compact construction allows space-saving installation while maintaining superior arc-quenching performance.

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Product Description

Type Designation

Code No.	Description
1	Manufacturer Code
2	Molded Case Circuit Breaker Code
3	Design Code
4	Frame Size
5	Short-Circuit Breaking Capacity Level
6	Operation Method
7	Number of Poles
8	Trip Unit Method & File Code

Technical Parameters

SJKM8 Series Circuit Breaker	SJKM8-100	SJKM8E-160/250	SJKM8-160/250	SJKM8-400	SJKM8-630
Pole Number	1, 2, 3, 4	3	3, 4	3, 4	3, 4
Rated Current (A) In 40℃	100	160/250	160/250	400	630
Rated Insulation Voltage (Ui)	690V	690V	690V	690V	690V
Rated Impulse Withstand Voltage (Uimp)	6kV	6kV	6kV	6kV	6kV
Rated Working Voltage (Ue) AC 50/60Hz	500V	500V	500V	500V	500V
Performance Standards: IEC 60947-2, EN 60947-2

Product Display

Ambient Temperature Derating

SJKM8-100~630 Series

Rated Current (A)	40℃	45℃	50℃	55℃	60℃	65℃	70℃
15	15.7	15.3	15	14.7	14.6	14.2	13.8
50	52.1	51.0	50	49.3	48.1	47.3	46.6
100	103	101	100	99.2	94.2	93.5	92.7
250	270.6	260.5	250	239	227.5	215.4	202.6
400	428	416	400	384	364	348	332
630	630	615	600	585	570	550	535

Installation & Dimensions

SJKM8-100 1P, 2P Fixed-type

SJKM8-100 3P, 4P Fixed-type

Outline Dimensions
Chassis Installation Compatibility
DIN Rail Installation Support
Front-of-Panel Opening (Small & Large Options)

Frequently Asked Questions

What standards do SJKM8 series circuit breakers comply with?

The SJKM8 series electrical performance fully complies with international IEC 60947-2 and EN 60947-2 standards.

What is the rated insulation voltage (Ui) for these MCCBs?

The rated insulation voltage for the entire SJKM8 series is 690V, ensuring safe operation in industrial environments.

Are there different breaking capacity levels available?

Yes, the series offers different types such as N (Normal) and H (High) breaking capacities to suit various short-circuit protection requirements.

How does ambient temperature affect the rated current?

The rated current is calibrated at 40℃. As temperature increases (up to 70℃), the effective current capacity undergoes derating according to the technical ambient temperature table.

What installation methods are supported?

SJKM8 circuit breakers support fixed front connection, rear connection, and plug-in types, as well as DIN rail installation for specific frame sizes.

Does this series support leakage protection?

Yes, models from 160A to 630A can be equipped with complete leakage protection or used in conjunction with a Vigirex relay.

Product Detail

OEM SJKM8 Moulded Case Circuit Breaker MCCB Suppliers, Manufacturer

Product Description

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Product Detail

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