NB1-63 1B 4A 6kA

NB1-63 Miniature Circuit Breaker (MCB) are used in domestic installation, as well as in commercial and industry electrical distribution systems. Protection of circuits against short-circuit currents, protection of circuits against overload currents, switch,isolation.

Tripping curve B (3-5In): protection for people and big length cables in TN and IT systems.

1-pole, AC, 4A, B-curve, fork type busbar connection from below
Manufacturer’s code: 971279
6kA, IEC/EN 60898-1, 10kA; (Icu=10kA IEC/EN 60947-2)

Rated current In: 4 A
Poles: 1P
Rated voltage Ue: 230/400~240/415 V
Insulation voltage Ui: 500 V
Rated frequency: 50/60 Hz
Rated breaking capacity: 6 kA
Energy limiting class: 3
Rated impulse withstand voltage(1.2/50) Uimp: 4000 V
Dielectric test voltage at ind. Freq. for 1 min: 2 kV
Thermo-magnetic release characteristic: B

Electrical life: 4 000
Mechanical life: 20 000
Protection degree: IP20
Ambient temperature (with daily average≤35℃): -5...+40 ℃
Storage temperation: -25...+70 ℃
Terminal connection type: Cable/U-type busbar/Pin-type busbar
Mounting: On DIN rail EN 60715 (35mm) by means of fast clip device
Connection: From top and bottom

Auxiliary contact: Yes
Shunt release: Yes
Under voltage release: Yes
Alarm contant: Yes