Professional Low Voltage Electrical Manufacturer & Supplier | OEM/ODM Available
GRB6-63 Miniature Circuit Breaker (MCB) 1A-63A Low Voltage Circuit Protection Device
The GRB6-63 Miniature Circuit Breaker (MCB) is designed to provide reliable protection for low-voltage electrical systems against overload and short circuits. With a rated current range from 1A to 63A, it is suitable for residential, commercial, and industrial power distribution applications. Featuring stable performance, high reliability, and easy DIN rail installation, it ensures safe and efficient electrical protection.
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Technical Data |
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Item |
Unit |
Specification |
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Rated Current (In) |
A |
1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63 |
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Rated Operational Voltage (Ue) |
V |
230/240, 400/415 |
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Number of Poles |
– |
1P, 2P, 3P, 4P, 1P+N, 3P+N |
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Rated Ultimate Breaking Capacity (Icu) |
kA |
6 |
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Rated Service Breaking Capacity (Icn) |
kA |
6 |
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Rated Frequency |
Hz |
50/60 |
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IP Rating |
– |
IP20 |
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Tripping Characteristics |
– |
B, C, D Curve |
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Energy Limiting Class |
– |
Class 3 |
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Electrical Endurance |
Cycles |
4000 |
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Mechanical Endurance |
Cycles |
10000 |
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Rated Insulation Voltage (Ui) |
V |
500 |
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Rated Impulse Withstand Voltage (Uimp) |
kV |
4 |
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Max. Connectable Cable Section |
mm² |
25 |
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Tightening Torque |
N·m |
2.5 |
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Terminal Type |
– |
Pillar Type |
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Features |
Applications |
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Dual protection: thermal overload and magnetic short-circuit |
Residential: Household lighting, socket circuit protection |
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Flame-retardant PA66 housing with anti-aging and shock resistance |
Commercial: Office, supermarket, mall distribution box |
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Quick-mount clip design for fast DIN rail installation |
Industrial: Small machinery, control cabinet, motor auxiliary circuit |
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Visible ON/OFF status indicator |
Engineering: Construction power distribution, prefabricated switchboard |
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Wide current range 1A~63A, B, C, D trip characteristic curves for diverse loads |
Global markets: Middle East, Southeast Asia, Europe, Africa, Latin America |
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Long service life, low failure rate |
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Complies with IEC 60898-1, CE certified |
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Pole |
Qty/Box |
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1P Miniature Circuit Breaker |
12 PCS |
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2P Miniature Circuit Breaker |
6 PCS |
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3P Miniature Circuit Breaker |
4 PCS |
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4P Miniature Circuit Breaker |
3 PCS |
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Pole |
PCS/Carton |
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1P MCB Export Carton |
240 |
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2P MCB Export Carton |
120 |
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3P MCB Export Carton |
80 |
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4P MCB Export Carton |
60 |
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Carton size：42×24×34 cm |
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Gross weight：G.W≈21 kg/ CTN |
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Packing：Neutral export carton, anti-collision foam inner support, OEM box acceptable |
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Standard stock: C curve. B and D curves are available upon customized production with MOQ requirements. |
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Designed for AC power systems only. Not suitable for DC circuit applications. |
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IP20 protection rating. Suitable for indoor installation only. Not for outdoor exposed use. |
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