Description
4 pole MCB miniature circuit breaker is rated for 40 amps with a C trip curve, offering dependable overload and short circuit protection for electrical systems. This mini circuit breaker features a 6kA breaking capacity, delivering superior protection in both commercial and industrial settings.
4 Pole MCB Breaker Information
- Rated Current: 40 amp
- Rated Voltage: 230/400V AC, 50Hz
- Number of poles: 4 pole
- 6 kA rated short-circuit breaking capacity
- Compliant with IEC standard
- C curve trip characteristic
- With overload protection and short circuit protection function
Technical Data
| Model | ATO-NB8-634PC40 | |
| Rated Current | 40A | |
| Rated Voltage | 230/400V | |
| Frequency | 50Hz | |
| Number of Poles | 4P | |
| Mechanical Life | 20000 Times | |
| Electrical Life | 10000 Times | |
| Rated Short-Circuit Breaking Capacity | 6000A | |
| Operating Short-Circuit Breaking Capacity | 6000A | |
| Rated Impulse Withstand Voltage (1.2/50) | 6kV | |
| Dielectric Test Voltage | 2000V (50Hz, 1 min) | |
| Heat & Humidity Resistance | 28 Cycles | |
| Vibration Resistance | No Obvious Vibration and Impact | |
| Terminal Block | Terminal Block Type | Pillar Terminal Block |
| Min. Terminal Size Acceptability | 1mm2 | |
| Max. Terminal Size Acceptability | 25mm2 | |
| Standard Connection Torque | 2 N.m | |
| Max. Tolerable Torque | 2.5 N.m | |
| Wire Insertion Depth | 13mm | |
| Reference Temperature | 30℃ | |
| Operating Temperature | -35℃~+70℃ | |
| Storage Temperature | 35℃~+85℃ | |
| Applicable Altitude | 2000m | |
| Tripping Mode | Thermal Magnetic Trip | |
| Electromagnetic Tripping Type | Type C (5In-10In) | |
| Shell Flame Retardant Grade | V0 | |
| Wire Entry Method | Both Upper and Lower | |
| Installation Method | TH35-7.5 Standard Rail | |
| Protection Level | Direct Installation | IP20B |
| Installed in the Distribution Box | IP40B |
4 Pole MCB Breaker Dimensions (Unit: mm)
Details
Tips: Main parameters of miniature circuit breaker
A miniature circuit breaker (MCB) is an essential component used for protecting electrical circuits from overload and short circuits. Here are the main parameters to consider when selecting an MCB:
- Rated Current (In): The maximum current the MCB can carry without tripping, typically measured in amperes (A).
- Breaking Capacity (Icu): The maximum fault current the mini circuit breaker can interrupt without causing damage, expressed in kA.
- Tripping Curve: Defines the time it takes for the MCB to trip at different levels of overcurrent. Common types include B, C, and D curves, each suitable for different applications.
- Rated Voltage (Un): The voltage the micro circuit breaker is designed to operate at, usually 230V or 400V for residential or industrial systems.
- Poles: The number of poles (single, double, triple, or four-pole) depends on the configuration of the circuit.
- Environmental Conditions: Consider temperature, humidity, and altitude ratings for optimal performance.
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