The TBC-4125Z is a high-performance 4-pole miniature circuit breaker engineered to deliver reliable protection against overload and short-circuit conditions in demanding commercial and industrial environments. With a robust 125A rated current capacity and 10kA breaking capacity, this MCB combines advanced thermal-magnetic trip technology with durable construction to ensure continuous circuit protection and operational safety in distribution boards and control panels.
The TBC-4125Z miniature circuit breaker represents a professional-grade solution for electrical distribution protection in commercial and industrial installations. Designed to meet the rigorous demands of modern electrical systems, this 4-pole MCB provides comprehensive protection for three-phase circuits with neutral monitoring.
Utilizing proven thermal-magnetic trip technology, the TBC-4125Z offers dual-mode protection: the thermal element guards against sustained overload conditions, while the magnetic element provides instantaneous protection against short-circuit faults. The Type C tripping curve makes this breaker particularly suitable for circuits with inductive loads, motors, and transformers where higher inrush currents are expected.
Built to international standards and certified to IEC 60947-2, the TBC-4125Z ensures reliable performance across a wide range of environmental conditions. Its robust construction delivers exceptional mechanical and electrical durability, while the compact footprint optimizes space utilization in distribution boards and control panels.
The DIN rail mounting system enables rapid installation and replacement, reducing installation time and labor costs. The intuitive toggle control mechanism provides clear ON/OFF indication and allows for easy manual operation during maintenance procedures.
Trip Technology: The TBC-4125Z employs thermal-magnetic trip technology combining a bimetallic thermal element for overload protection and an electromagnetic coil for short-circuit protection. The Type C characteristic provides tripping at 5-10 times rated current, making it ideal for circuits with moderate inrush currents.
Breaking Capacity: With a 10kA breaking capacity at 415V AC, this MCB can safely interrupt fault currents up to 10,000 amperes, providing robust protection in typical commercial and industrial distribution systems.
Electrical Characteristics: Rated for 125A continuous current at 415V AC, 50Hz operation. Suitable for AC network types with four-pole switching for complete circuit isolation including neutral conductor.
Environmental Performance: Designed for operation in ambient temperatures from -35°C to +70°C with relative humidity up to 95%, ensuring reliable performance in diverse installation environments. IP20 protection rating provides protection against solid objects greater than 12.5mm.
Durability & Reliability: Mechanical endurance of 20,000 operations and electrical endurance of 4,000 operations under load conditions ensure long service life and minimal maintenance requirements.
Standards Compliance: Manufactured and tested in accordance with IEC 60947-2 international standards. CE marked for European market compliance.
| Parameter | Specification |
|---|---|
| Product Type | Miniature Circuit Breaker (MCB) |
| Model Number | TBC-4125Z |
| Number of Poles | 4P |
| Rated Current (In) | 125A |
| Rated Voltage (Un) | 415V AC |
| Frequency | 50Hz |
| Network Type | AC |
| Breaking Capacity (Icu) | 10kA |
| Trip Unit Technology | Thermal-Magnetic |
| Tripping Curve | Type C |
| Control Type | Toggle |
| Mounting Type | DIN Rail |
| Mechanical Durability | 20,000 cycles |
| Electrical Durability | 4,000 cycles |
| Operating Temperature | -35°C to +70°C |
| Relative Humidity | 0 – 95% |
| Degree of Protection | IP20 |
| Height | 81 mm |
| Width | 108 mm |
| Depth | 77 mm |
| Standards Compliance | IEC 60947-2 |
| Certification | CE Marking |
| Product Application | Distribution |
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