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The Hager MCB 4P 25kA B-20A 4M is a four-pole 20A B-curve breaker for three-phase + neutral protection against overloads and short circuits. With 25kA Icu (230/400V), 10kA Icn and 6kV impulse withstand, it suits commercial/industrial panels. Compact 4M, 415V AC, IP20. Screw/biconnect terminals accept 1-35 mm² for fast, secure wiring. Rated −25 to 70°C, 4,000 electrical/20,000 mechanical ops.
EAN
3250614645921
Packaging
1 Piece
Miniature Circuit Breaker 3P 63A Curve B 15kA 3 Modules NQN420
Phase out product: please contact your electrical wholesaler for availability
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Complete your system
Optional accessories
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Modular phase busbar 1 products available -
Terminal cover 1 products available -
AOB type A-HI 4 products available -
AOB type AC 8 products available -
AOB type AC/A-SEL 1 products available
Complete your system
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BDH825
Earth leakage add-on-block with double output 4P 25A 30mA A high immunity class
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BFH825
Earth leakage add-on-block with double output 4P 25A 300mA A high immunity class
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BFH863
Earth leakage add-on-block with double output 4P 63A 300mA high immunity class
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BFH840
Earth leakage add-on-block with double output 4P 40A 300mA A high immunity class
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BE464
Earth leakage add-on block 4P 63A 100mA AC Class
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BG464Earth leakage add-on block 4P 63A 500mA AC Class
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BFC825Earth leakage add-on-block with double output 4P 25A 300mA AC class
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BFC840Earth leakage add-on-block with double output 4P 40A 300mA AC class
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BFC863Earth leakage add-on-block with double output 4P 63A 300mA AC class
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BDC825Earth leakage add-on-block with double output 4P 25A 30mA AC class
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BD426Earth leakage add-on block 4P 25A 30mA AC Class
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BF426Earth leakage add-on block 4P 25A 300mA AC Class
Technical properties
Electric current
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Rated current20 A
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Rated service breaking capacity Ics under 230 V AC according to IEC 60947-215 kA
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Rated ultimate short-circuit breaking capacity Icu AC IEC 60947-225 kA
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Rated ultimate short-circuit breaking capacity Icu under 400 V AC IEC 60947-225 kA
Architecture
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Type of pole4P
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CurveB
Capacity
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Number of modules4
Main electrical attributes
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Rated short-circuit breaking capacity Icn AC according to IEC 60898-110 kA
Installation, mounting
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Nominal tightening torque top terminal2.80 - 2.80 Nm
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Nominal tightening torque down terminal2.80 - 2.80 Nm
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Nominal tightening torque2.80 - 2.80 Nm
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Type of bottom connection for modular devicesbiconnect
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Type of top connection for modular devicesScrew terminal
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360° mounting position possibleYes
Voltage
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Rated operational voltage Ue415 - 415 V
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Type voltage supplyAC
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Rated insulation voltage Ui500 V
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Rated impulse withstand voltage Uimp6000 V
Frequency
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Frequency50 - 60 Hz
Connection
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Cross-section of input and output with screws, for massive conductors1 - 35 mm²
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Cross-section of input and output with screws, for flexible conductors1 - 25 mm²
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Cross-section of input with screws, for flexible conductors1 - 25 mm²
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Cross-section of input with screws, for massive conductors1 - 35 mm²
Safety
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Ingress Protection (IP) classIP20
Use conditions
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Degree of pollution according to IEC 60664 / IEC 60947-22
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Class of energy limitation I²t3
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Air humidity protectionFor all climates
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Operating temperature-25 - 70 °C
Power
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Total power loss under IN10.87 W
Connectivity
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Type of connectionScrew terminal
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Top connection alignment for modular devicesAligned terminal
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Down connection alignment for modular devicesAligned terminal
Dimensions
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Height83 mm
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Width70 mm
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Depth70 mm
Environmental value
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Certifications and documents
Downloads
More documentation