The TBC-450M is a professional-grade 4-pole miniature circuit breaker engineered to deliver dependable overload and short-circuit protection in demanding low-voltage electrical distribution environments. Featuring advanced thermal-magnetic trip technology with Type C characteristics, this MCB is ideal for residential, commercial, and light industrial applications requiring robust circuit protection.
The TBC-450M miniature circuit breaker represents a reliable solution for protecting electrical circuits against overload and short-circuit conditions in modern distribution systems. Its 4-pole design makes it particularly suitable for three-phase installations where simultaneous disconnection of all phases and the neutral conductor is required.
Built with precision thermal-magnetic trip mechanisms, the TBC-450M responds accurately to overcurrent conditions while minimizing nuisance tripping. The Type C tripping characteristic is specifically engineered to handle inductive loads, making it ideal for circuits supplying motors, transformers, and other equipment with moderate inrush currents.
Constructed to meet rigorous international standards, this MCB offers exceptional mechanical and electrical durability, ensuring long-term performance in residential distribution boards, commercial buildings, and light industrial facilities. The compact design optimizes panel space while the standard DIN rail mounting enables quick and secure installation.
Trip Technology: The TBC-450M employs proven thermal-magnetic trip technology combining a bimetallic element for overload protection and an electromagnetic release for short-circuit protection. The Type C characteristic provides tripping at 5-10 times rated current, making it suitable for circuits with moderate inrush currents.
Breaking Performance: With a rated breaking capacity of 6kA at 415V AC, this MCB can safely interrupt fault currents up to 6,000 amperes, providing adequate protection for most residential and commercial applications. The ultra-fast tripping time of less than 0.1 seconds minimizes potential damage to connected equipment and wiring.
Construction & Durability: The circuit breaker housing is manufactured from high-grade thermoplastic materials offering excellent arc resistance and mechanical strength. Contact materials are selected for low resistance and high wear resistance, contributing to the device's 20,000 mechanical operations and 4,000 electrical operations lifecycle.
Installation & Mounting: Designed for standard 35mm DIN rail mounting, the TBC-450M features a secure snap-on mechanism. The 4-pole configuration occupies 72mm width (4 modules), allowing efficient use of distribution board space. Terminal design accommodates a range of conductor sizes for flexible installation.
Environmental Performance: Rated IP20 for protection against solid objects greater than 12.5mm, the MCB operates reliably across a wide temperature range from -35°C to +70°C and humidity levels up to 95%, ensuring consistent performance in diverse 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 | 4P |
| Rated Current (In) | 50 A |
| Tripping Technology | Thermal-Magnetic |
| Tripping Curve | Type C |
| Tripping Time | t < 0.1 s |
| Breaking Capacity (Icn) | 6 kA |
| Mechanical Characteristics | |
| Control Type | Toggle |
| Mounting Type | DIN Rail (35 mm) |
| Mechanical Durability | 20,000 cycles |
| Electrical Durability | 4,000 cycles |
| Physical Dimensions | |
| Height | 78 mm |
| Width | 72 mm (4 modules) |
| Depth | 66 mm |
| Environmental Conditions | |
| Operating Temperature | -35 °C to +70 °C |
| Relative Humidity | 0 – 95 % |
| Degree of Protection | IP20 |
| Standards & Compliance | |
| Standards | IEC 60898-1 |
| Certifications | CE, CB, TÜV |
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