High-Quality China SJKM8 MCCB Suppliers | 100A to 630A Moulded Case Circuit Breaker Factory for Reliable Circuit Protection Supplier, Companies

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High-Quality China SJKM8 MCCB Suppliers | 100A to 630A Moulded Case Circuit Breaker Factory for Reliable Circuit Protection Supplier, Companies

The SJKM8 Moulded Case Circuit Breaker (MCCB) is a high-performance solution for circuit protection in China, suitable for both 50Hz and 60Hz systems with insulation ratings up to 690V and current capacities ranging from 100A to 630A. This MCCB is available in various configurations including 1P, 2P, 3P, and 4P, making it a versatile choice for any panel integration. As one of the leading suppliers in the industry, we ensure that the SJKM8 MCCB adheres to IEC60947-2 and EN60947-2 standards, providing robust performance for industrial and commercial applications. Designed for optimal overload and short-circuit protection, this product is perfect for power distribution systems that demand high breaking capacity. Its compact design allows for space-saving installations without compromising on superior arc-quenching performance, making it an ideal choice for customers looking for reliable products from a reputable factory.

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Product Description

Type Designation

1	Manufacturer Code
2	Molded Case Circuit Breaker Code
3	Design Code
4	Frame Size
5	Short-Circuit Breaking Capacity Level 4
6	Operation method 3
7	Number of Poles 2
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
Control	Manual		Toggle handle	■		■		■		■		■
			Direct or extended rotary handle	■		■		■		■		■
Type	Fixed		Front connection	■		■		■		■		■
			Rear connection	-		■		■		■		■
	Plug-in		Front connection	■		■		■		■		■
			Rear connection	-		■		■		■		■
Electrical performance complies with IEC 60947-2 and EN 60947-2 standards
Rated Current (A) In 40℃				100		160/250		160/250		400		630
Rated Insulation Voltage(V) Ui				690		690		690		690		690
Rated Impulse Withstand Voltage (kV) Uimp				6		6		6		6		6
Rated Working Voltage (V) Ue AC 50/60Hz				500		500		500		500		500
Circuit Breaker Type				N	H	N	H	N	H	N	H	N	H
Ultimate Breaking Capacity (kA rms) Icu	AC 50/60Hz		220/240V	50	65	50	85	50	85	85	100	85	100
			380/400V	25	35	25	36	25	36	36	50	36	50
			415V	25	30	25	36	25	36	36	50	36	50
			440V	20	20	20	25	20	25	36	50	36	50
			500V	10	10	8	10	8	10	20	36	20	36
Service Breaking Capacity (kA rms) lcs	AC 50/60Hz		220/240V	25	30	25	43	25	43	43	50	43	50
			380/400V	13	17	13	18	13	18	18	25	18	25
			415V	7	7	13	18	13	18	18	25	18	25
			440V	5	5	10	13	10	13	18	25	18	25
			500V	3	3	4	5	4	5	10	18	10	18
Isolation Function				■		■		■		■		■
Application Category				A		A		A		A		A
Maximum Expected Maintenance Value (C-O Cycle)		Mechanical		8500		10000		10000		6000		6000
		Electrical 440V In		4000		5000		5000		1000		1000
Protection
Release				Thermo-magnetic		Thermo-magnetic		Thermo-magnetic		Thermo-magnetic		Thermo-magnetic
Overload Protection	Long-time Delay		Ir(In×…)	■		■		■		■		■
Short-Circuit Protection	Short-time Delay		Isd(In×…)	-		-		-		-		-
	Instantaneous		li(In× ·)	■		■		■		■		■
Leakage Protection	Circuit Breaker with Complete Leakage Protection			-		-		■		■		■
	Vigirex Relay			■		■		■		■		■
Indication and Control Auxiliaries
Auxiliary Contact (FZ) and Alarm Contact (BJ)				■		■		■		■		■
Auxiliary Alarm Contact (FZ/BJ)				■		■		■		■		■
Shunt Trip Coil (FL)				■		■		■		■		■
Under-Voltage Coil (QY)				■		■		■		■		■
Modbus Communication
Pm200 Meter	Electrical Measurement (Current, Voltage, Power, Energy)			■		■		■		■		■
Mc Multi-Circuit Monitoring Unit	Status			■		■		■		■		■
	Electrical Measurement (Current, Voltage)			■		■		■		■		■
Installation
Accessories	Terminal Expansion and Extension			■		■		■		■		■
	Terminal Cover			■		■		■		■		■
	Phase Separator			■		■		■		■		■
Circuit Breaker Type				N/H		N/H		N/H		N/H		N/H
Dimensions (mm) W×H×D	Fixed Front Connection		1P	25×130×60		-		-		-		-
	Fixed Front Connection		2P	50×130×60		-		-		-		-
	Fixed Front Connection		3P	75×130×60		105x165x60		105x165×68		140x257x103		140×257x103
	Fixed Front Connection		4P	100×130×60		-		140x165x68		185×257x103		185x257x103
Weight (kg)	Fixed Front Connection		1P/2P	0.28/0.48		-		-		-		-
	Fixed Front Connection		3P/4P	0.78/1.0		1.3		1.6/2.1		6.05/7.9		6.5/8.7

Product Display

Ambient Temperature

SJKM8-100~630

Rated current	Environmental temperature
(A)	40℃	45℃	50℃	55℃	60℃	65℃	70℃
15	15.7	15.3	15	14.7	4.6	14.2	13.8
20	20.4	20.2	20	19.9	192	18.9	16.5
25	25.7	25.3	25	24.7	24.5	24.3	24.0
30	314	30.7	30	294	29.1	28.5	28.0
40	40.9	404	40	39.5	38.0	376	37.1
50	52.1	510	50	49.3	48.1	473	46.6
60	61.8	60.9	60	59.0	57.5	56.6	55.7
75	76.8	759	75	73.5	70.4	698	69.1
80	82.2	811	80	78.5	77.3	75.7	76.1
100	103	101	100	992	94.2	93.5	92.7
100	106.8	103.5	100	96.4	92.7	88.8	84.7
125	134.9	130	125	1198	114.3	108.5	102.5
160	170.9	165.5	160	154.3	148.3	142.1	135.6
175	175	168	161	154	146	138	126
200	215	2076	200	192	183.8	175.1	165.9
225	243.5	234.5	225	215.1	204.8	193.9	1823
250	270.6	260.5	250	239	2275	2154	2026
250	268	260	250	240	228	218	208
320	342	333	320	307	291	278	266
350	375	364	350	336	319	305	291
400	428	416	400	384	364	348	332
400	400	390.5	381	3714	3619	349.2	339.7
500	500	488.1	476.2	464.3	4524	436.5	424.6
630	630	65	600	585	570	550	535

SJKM8-100 1P,2P Fixed-type Power Distribution and Motor Protection

① Outline Dimensions
② Chassis Installation
③ DIN Rail Installation
④ Front-of-Panel Opening (Small)
⑤ Front-of-Panel Opening (Large)

SJKM8-100 3P,4P Fixed-type Power Distribution and Motor Protection

① Outline Dimensions
② Chassis Installation
③ DIN Rail Installation
④ Front-of-Panel Opening (Small)
⑤ Front-of-Panel Opening (Large)

Frequently Asked Questions

Q What is the rated current range of the SJKM8 Series Moulded Case Circuit Breaker?

The SJKM8 Series MCCB covers a rated current range from 15A up to 630A at 40℃, with available frame sizes including SJKM8-100, SJKM8E-160/250, SJKM8-160/250, SJKM8-400, and SJKM8-630 to suit various power distribution and motor protection applications.

Q What international standards does the SJKM8 MCCB comply with?

The SJKM8 Series circuit breaker's electrical performance complies with IEC 60947-2 and EN 60947-2 standards, ensuring reliable and internationally recognized safety performance for industrial and commercial installations.

Q What is the maximum ultimate breaking capacity (Icu) of the SJKM8 MCCB?

The SJKM8 Series achieves a maximum ultimate breaking capacity (Icu) of up to 100kA rms at 220/240V AC for the H-type in the 400A and 630A frame sizes. At 380/400V, the maximum Icu reaches 50kA rms for H-type units in the 400A and 630A frames.

Q What installation types and connection methods are available for the SJKM8?

The SJKM8 supports both Fixed and Plug-in installation types, each with Front connection and Rear connection options. Control can be performed via a toggle handle or a direct/extended rotary handle, providing flexible installation solutions for different panel configurations.

Q Does the SJKM8 support Modbus communication and remote monitoring?

Yes. The SJKM8 Series supports Modbus communication through the Pm200 Meter for electrical measurements including current, voltage, power, and energy, as well as the Mc Multi-Circuit Monitoring Unit for status monitoring and current/voltage measurement across all frame sizes.

Q How does ambient temperature affect the rated current of the SJKM8 circuit breaker?

The rated current of the SJKM8 decreases as ambient temperature rises above the standard 40℃ reference. For example, a 630A breaker rated at 630A at 40℃ will derate to approximately 535A at 70℃. It is important to consult the ambient temperature derating table to ensure correct breaker selection for high-temperature environments.

High-Quality China SJKM8 MCCB Suppliers | 100A to 630A Moulded Case Circuit Breaker Factory for Reliable Circuit Protection Supplier, Companies

Product Description

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