ATO 1 pole 1A MCB miniature circuit breaker is an electrical switch to turn off the electrical circuit during a faulty condition to protect conductors.
Circuit Breaker Information
- Rated Current: 2 amp
- Rated Voltage: 230/400V AC, 50Hz
- Number of poles: 1 pole
- 6 kA short circuit interrupting capacity
- Accordance with IEC standard
- C curve trip characteristic gives you the ability to configure the exact protection scheme you required
Technical Data
Model | CHN-NB8-631PC02 |
Electrical Parameters | Height | 86 mm |
Width | 18 mm per pole |
Mounting | DIN Rail |
Rated Current (In) | 2A |
Number of poles | 1P |
Rated Voltage (Ue) | 230/400V |
Rated Insulation Voltage (Ui) | 500V |
Dielectric Test Voltage | 2000V |
Reted Frequency | 50Hz |
Short Circuit Interrupting Capacity | 6KA |
Trip Characteristic | C Curve (5-10In) |
Rated Short-Circuit Breaking Capacity | 6000A |
Operating Short-Circuit Breaking Capacity | 6000A |
Mechanical Parameters | Electrical Life | 10000 times |
Mechanical Life | 20000 times |
Flame Retardant Grade | V0 |
Protection Degree | Direct installation: IP20B Installed in the distribution box: IP40B |
Calibration Temperature | 30℃ |
Operating Temperature | -35℃~+70℃ |
Storage Temperature | -35℃~+85℃ |
Tightening Torque | 2 N.m |
Max. Tolerable Torque | 2.5 N.m |
Terminal Size Acceptability–Min/Max | 1 mm2 / 25mm2 |
Wire Insertion Depth | 13mm |
Circuit Breaker Dimension (Unit: mm)

Tips: Working principle of 1 pole miniature circuit breaker
The miniature circuit breaker is composed of operating mechanism, contacts, protection devices, arc extinguishing system, etc. The main contact is manually operated or electrically closed. After the main contact is closed, the free trip mechanism locks the main contact in the closing position. The coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit, and the coil of the undervoltage release is connected in parallel with the power supply. When the circuit is short-circuited or severely overloaded, the armature of the overcurrent release pulls in, causing the free tripping mechanism to operate, and the main contact disconnects the main circuit. When the circuit is overloaded, the heating element of the thermal trip unit will bend the bimetal and push the free trip mechanism to move. When the circuit is under-voltage, the armature of the under-voltage release is released. It also makes the free trip mechanism act.
Low price 1 pole miniature circuit breaker with 2 amp rated current, DIN rail mounting, can safely be used in AC 50Hz, 230/400V with a 6 kA short circuit withstand rating, provide overload and short circuit protection for conductors.