The TBC-250M is a high-performance 2-pole miniature circuit breaker engineered to deliver dependable protection against overload and short-circuit faults in low-voltage electrical distribution systems. Featuring thermal-magnetic tripping technology with Type C characteristic and 6kA breaking capacity, this MCB is ideal for safeguarding electrical circuits in residential, commercial, and light industrial environments.
The TBC-250M Miniature Circuit Breaker represents a robust solution for electrical circuit protection in diverse applications. Designed with precision engineering, this 2-pole MCB combines thermal and magnetic tripping mechanisms to provide comprehensive protection against both overload conditions and short-circuit faults.
With a rated current of 50A and breaking capacity of 6kA, the TBC-250M is well-suited for protecting circuits in residential distribution boards, commercial buildings, and light industrial installations. The Type C tripping characteristic makes it particularly effective for circuits with moderate inrush currents, including lighting circuits, general power distribution, and motor loads.
Built to international standards and certified by leading testing authorities, the TBC-250M ensures reliable performance across a wide range of environmental conditions. Its compact footprint and standard DIN rail mounting enable straightforward integration into existing electrical panels, while the toggle control mechanism provides intuitive manual operation.
The device's robust construction guarantees long service life with mechanical durability rated for 20,000 operations and electrical durability for 4,000 operations, making it a cost-effective choice for demanding applications.
Tripping Technology: The TBC-250M employs thermal-magnetic tripping technology, combining a bimetallic strip for overload protection with an electromagnetic release for short-circuit protection. This dual-mechanism approach ensures precise and reliable circuit interruption under various fault conditions.
Type C Tripping Curve: The Type C characteristic provides tripping at 5 to 10 times the rated current, making it suitable for circuits with moderate inrush currents such as fluorescent lighting, small motors, and general power distribution systems.
Breaking Capacity: With a 6kA breaking capacity at 415V AC, the TBC-250M can safely interrupt fault currents up to 6,000 amperes, providing adequate protection for most residential and commercial installations.
Voltage Rating: Rated for operation at 415V AC with 50/60 Hz frequency, the device is compatible with standard three-phase distribution systems. The 4kV rated impulse voltage ensures protection against transient overvoltages.
Construction & Mounting: The MCB features a thermoplastic housing with flame-retardant properties and is designed for standard 35mm DIN rail mounting. The IP20 degree of protection makes it suitable for installation in enclosed distribution boards and panels.
Environmental Performance: Engineered to operate reliably across an extended temperature range from -35°C to +70°C and humidity levels up to 95%, the TBC-250M maintains consistent performance in challenging environmental conditions.
| Parameter | Specification |
|---|---|
| Electrical Characteristics | |
| Rated Voltage (Un) | 415 V AC |
| Rated Frequency | 50 / 60 Hz |
| Rated Impulse Voltage | 4 kV |
| Network Type | AC |
| Number of Poles | 2P |
| Rated Current (In) | 50 A |
| Tripping Technology | Thermal-Magnetic |
| Tripping Curve | Type C |
| Tripping Time | t < 0.1 s |
| Breaking Capacity | 6 kA |
| Mechanical Characteristics | |
| Control Type | Toggle |
| Mounting Type | DIN Rail (35 mm) |
| Mechanical Durability | 20,000 operations |
| Electrical Durability | 4,000 operations |
| Environmental Conditions | |
| Operating Temperature | -35 °C to +70 °C |
| Relative Humidity | 0 – 95 % |
| Degree of Protection | IP20 |
| Physical Dimensions | |
| Height | 78 mm |
| Width | 36 mm |
| Depth | 66 mm |
| Compliance & Certification | |
| Standards | IEC 60898-1 |
| Certifications | CB CERT, CE Marking, TÜV |
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