The TBC-263M 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 residential, commercial, and light industrial installations where reliable circuit protection is essential.
The TBC-263M Miniature Circuit Breaker represents a robust solution for protecting electrical circuits in diverse applications. This 2-pole MCB combines advanced thermal-magnetic tripping technology with a Type C characteristic curve, making it particularly suitable for circuits with moderate inductive loads such as lighting systems, motors, and transformers.
Rated at 63 amperes with a breaking capacity of 6kA at 415V AC, the TBC-263M provides reliable protection against both overload conditions and short-circuit faults. The thermal element responds to sustained overload currents, while the magnetic element ensures rapid disconnection during short-circuit events in less than 0.1 seconds.
Designed for professional installation on standard 35mm DIN rails, this circuit breaker features a compact footprint of just 36mm width, allowing for efficient use of distribution board space. The robust construction ensures long service life with mechanical durability rated for 20,000 operations and electrical durability for 4,000 operations.
The TBC-263M operates reliably across a wide temperature range from -35°C to +70°C and can withstand relative humidity up to 95%, making it suitable for various environmental conditions. With IP20 protection rating and full compliance with IEC 60898-1 standards, along with CB CERT, CE marking, and TÜV certification, this MCB meets the highest international quality and safety requirements.
Tripping Characteristics:
The TBC-263M features a Type C tripping curve, which is specifically designed for circuits with moderate inductive loads. The Type C characteristic provides tripping at 5 to 10 times the rated current (In), making it ideal for applications involving transformers, fluorescent lighting, and small motors where inrush currents may occur during startup.
Thermal-Magnetic Protection:
The dual protection mechanism combines a bimetallic thermal element for overload protection and an electromagnetic release for short-circuit protection. The thermal element responds to prolonged overcurrent conditions by gradually heating and mechanically triggering the breaker. The magnetic element provides instantaneous tripping (t < 0.1s) when fault currents exceed the magnetic threshold, typically 5-10 times the rated current for Type C breakers.
Breaking Capacity:
With a rated breaking capacity of 6kA at 415V AC, the TBC-263M can safely interrupt fault currents up to 6,000 amperes. This breaking capacity is suitable for most residential, commercial, and light industrial installations where fault levels are moderate.
Installation and Mounting:
The MCB is designed for snap-on installation onto standard 35mm DIN rails (EN 60715), allowing for quick and secure mounting in distribution boards and consumer units. The 2-pole configuration requires 2 modules of space (36mm total width) in the distribution board.
Electrical Ratings:
Rated for operation at 415V AC with 50/60 Hz frequency, the TBC-263M features a rated impulse withstand voltage of 4kV, providing protection against voltage transients and surges in the electrical system.
| Parameter | Specification |
|---|---|
| Product Identification | |
| Model Number | TBC-263M |
| Product Type | Miniature Circuit Breaker (MCB) |
| Number of Poles | 2P |
| Rated Current (In) | 63 A |
| Electrical Characteristics | |
| Rated Voltage (Un) | 415 V AC |
| Rated Frequency | 50 / 60 Hz |
| Rated Impulse Voltage | 4 kV |
| Network Type | AC |
| Tripping Technology | Thermal-Magnetic |
| Tripping Curve | Type C |
| Tripping Time | t < 0.1 s |
| Breaking Capacity (Icn) | 6 kA |
| Mechanical Characteristics | |
| Control Type | Toggle Switch |
| 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 (2 modules) |
| Depth | 66 mm |
| Compliance & Certification | |
| Standards Compliance | IEC 60898-1 |
| Certifications | CB CERT, CE Marking, TÜV |
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