The TBC TH-232 is a high-performance 2-pole Residual Current Circuit Breaker (RCCB) engineered to deliver reliable protection against earth leakage faults in low-voltage electrical distribution systems. With its 30mA sensitivity and instantaneous tripping mechanism, this device ensures rapid circuit disconnection when earth leakage current is detected, significantly reducing the risk of electric shock and fire hazards. Ideal for residential and commercial applications, the TH-232 combines robust construction with precise electromechanical trip technology to safeguard both personnel and electrical installations. Built to IEC 60898-1 standards and certified by TÜV, CE, and CB, the TH-232 ensures reliable safety and compliance for modern electrical distribution systems.
The TBC TH-232 Residual Current Circuit Breaker represents a critical safety component in modern electrical distribution systems. This 2-pole RCCB is specifically designed to detect and respond to earth leakage currents as low as 30mA, providing essential protection against electric shock hazards that conventional circuit breakers cannot address.
Utilizing proven electromechanical trip unit technology, the TH-232 continuously monitors the balance between live and neutral currents. When an imbalance exceeding 30mA is detected—indicating current leaking to earth through a fault or human contact—the device trips instantaneously, disconnecting the circuit in less than 0.2 seconds under normal conditions and even faster (< 0.04s) at higher leakage levels.
The compact design occupies minimal space in distribution boards while delivering robust performance with a 10kA breaking capacity. Its DIN rail mounting system ensures quick and secure installation, while the durable construction guarantees long service life with ratings of 10,000 mechanical operations and 4,000 electrical operations.
Suitable for operation across a wide temperature range and compliant with international IEC standards, the TH-232 is the ideal choice for protecting final circuits in residential homes, commercial buildings, and light industrial facilities where personnel safety is paramount.
Protection Principle: The TH-232 operates on the residual current principle, continuously comparing the current flowing through the live conductor with the return current in the neutral conductor. Under normal conditions, these currents are equal. When a ground fault occurs—such as current leaking through damaged insulation or a person touching a live part—an imbalance is created. The RCCB's sensitive toroidal transformer detects this residual current, and when it exceeds the 30mA threshold, the electromechanical trip mechanism is activated to open the circuit contacts.
Type AC Classification: This device is classified as Type AC, meaning it is designed to detect and respond to alternating sinusoidal residual currents. It provides effective protection for standard AC loads commonly found in residential and commercial installations.
Tripping Characteristics: The TH-232 features instantaneous tripping with no intentional time delay. At the rated residual operating current (1×IΔn = 30mA), the device trips within 0.2 seconds. At five times the rated residual current (5×IΔn = 150mA), tripping occurs within 0.04 seconds, ensuring rapid protection under more severe fault conditions.
Breaking Capacity: With a 10kA breaking capacity, the TH-232 can safely interrupt fault currents up to 6,000 amperes, providing adequate protection for typical residential and light commercial installations.
Installation and Maintenance: The device mounts directly onto standard 35mm DIN rails and occupies a compact footprint of 35mm width. Regular testing using the integrated TEST button is essential to verify proper operation—this button simulates a ground fault condition to confirm the trip mechanism functions correctly. Monthly testing is recommended for critical installations.
| Parameter | Specification |
|---|---|
| Product Type | Residual Current Circuit Breaker (RCCB) |
| Model Number | TH-232 |
| Poles | 1P + N (2 Pole) |
| Rated Current (In) | 32 A |
| Rated Voltage (Un) | 240 V AC |
| Frequency | 50 / 60 Hz |
| Network Type | AC |
| Earth-leakage Sensitivity (IΔn) | 30 mA |
| Earth-leakage Protection Class | Type AC |
| Earth-leakage Protection Time Delay | Instantaneous |
| Tripping Time (1 × IΔn) | < 0.2 s |
| Tripping Time (5 × IΔn) | < 0.04 s |
| Trip Unit Technology | Electromechanical |
| Breaking Capacity | 10 kA |
| Control Type | Toggle |
| Mounting Method | DIN Rail (35mm) |
| Mechanical Durability | 10,000 operations |
| Electrical Durability | 4,000 operations |
| Degree of Protection | IP20 |
| Height | 90.4 mm |
| Width | 35 mm |
| Depth | 75.3 mm |
| Operating Temperature | −35 °C to +70 °C |
| Relative Humidity | 0 – 95 % |
| Standards Compliance | IEC 60898-1 and certified by TÜV, CE, and CB |
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