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SJKM8-MCCB-(1).jpg
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SJKM8 Moulded Case Circuit Breaker MCCB

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 details

    Type Designation

    SJKM8-Moulded-Case-Circuit-Breaker-6
    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

    SJKM8-MCCB-(5)
    SJKM8-Moulded-Case-Circuit-Breaker-(1)
    SJKM8-Moulded-Case-Circuit-Breaker-(2)
    SJKM8-Moulded-Case-Circuit-Breaker-(3)
    SJKM8-Moulded-Case-Circuit-Breaker-(4)
    SJKM8-Moulded-Case-Circuit-Breaker-(5)

    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

    SJKM8-4

    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

    SJKM8-5

    ① Outline Dimensions

    ② Chassis Installation

    ③ DIN Rail Installation

    ④ Front-of-Panel Opening (Small)

    ⑤ Front-of-Panel Opening (Large)