The TBC TH-263 is a high-performance 2-pole residual current circuit breaker (RCCB) engineered to deliver superior protection against earth leakage faults in electrical distribution systems. With a rated current of 63A and 30mA sensitivity, this RCCB automatically disconnects the circuit when leakage current exceeds safe thresholds, ensuring personal safety and fire prevention. Designed for DIN rail mounting, it offers reliable electromechanical protection for residential buildings, commercial premises, and industrial control panels. Built to IEC 60898-1 standards and certified by TÜV, CE, and CB, the TH-263 ensures reliable safety and compliance for modern electrical distribution systems.
The TBC TH-263 Residual Current Circuit Breaker represents a critical safety component in modern electrical installations. This 2-pole RCCB is specifically designed to detect and respond to earth leakage currents that could pose serious risks to human life and property.
When an earth fault occurs—such as when current leaks through damaged insulation or faulty equipment—the TH-263 detects the imbalance between live and neutral conductors. If this leakage exceeds 30mA, the device trips instantaneously, disconnecting the circuit and preventing potential electric shock or fire hazards.
Built with robust electromechanical technology, this RCCB offers dependable performance across a wide range of environmental conditions. The toggle control mechanism ensures easy manual operation, while the integrated TEST button allows users to verify proper functioning at regular intervals, as recommended by safety standards.
With its compact 35mm width and standard DIN rail mounting, the TH-263 integrates seamlessly into distribution boards and control panels, making it an ideal choice for electrical contractors, facility managers, and industrial maintenance teams seeking reliable earth leakage protection.
Protection Principle: The TH-263 operates on the residual current principle, continuously monitoring the current balance between the live and neutral conductors. When the difference (residual current) exceeds the rated sensitivity of 30mA, the electromechanical trip mechanism activates, opening the circuit contacts.
Type AC Classification: This RCCB is classified as Type AC, designed to detect alternating sinusoidal residual currents. It provides effective protection in standard residential and commercial AC networks operating at 50/60 Hz frequency.
Tripping Characteristics: The device features instantaneous tripping with no intentional time delay. At rated residual current (1×IΔn = 30mA), the tripping time is less than 0.2 seconds. At 5 times the rated residual current (5×IΔn = 150mA), the response time is even faster at less than 0.04 seconds, ensuring rapid protection.
Durability & Reliability: Engineered for long service life, the TH-263 offers mechanical durability of 10,000 operating cycles and electrical durability of 4,000 cycles under load conditions. The electromechanical trip unit provides fail-safe operation independent of external power supply.
Environmental Performance: With an operating temperature range from -35°C to +70°C and humidity tolerance up to 95%, this RCCB performs reliably in diverse environmental conditions. The IP20 protection rating makes it suitable for indoor installation in standard electrical enclosures.
Testing & Maintenance: The integrated TEST button simulates a leakage condition, allowing users to verify proper operation. Regular testing (monthly or quarterly) is recommended to ensure continued protection effectiveness.
| Electrical Characteristics | |
|---|---|
| Product Type | Residual Current Circuit Breaker (RCCB) |
| Poles | 1P + N (2 Pole) |
| Rated Current (In) | 63 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 |
| Tripping Time (1×IΔn) | t < 0.2 s |
| Tripping Time (5×IΔn) | t < 0.04 s |
| Earth-Leakage Time Delay | Instantaneous |
| Trip Unit Technology | Electromechanical |
| Mechanical Characteristics | |
|---|---|
| Control Type | Toggle |
| Mounting | DIN Rail |
| Mechanical Durability | 10,000 cycles |
| Electrical Durability | 4,000 cycles |
| Environmental Conditions | |
|---|---|
| Operating Temperature | -35°C to +70°C |
| Relative Humidity | 0 – 95% |
| Degree of Protection | IP20 |
| Dimensions | |
|---|---|
| Height | 90.4 mm |
| Width | 35 mm (2 modules) |
| Depth | 75.3 mm |
| Standards & Compliance | |
|---|---|
| Compliance Standards | IEC 60898-1 and certified by TÜV, CE, and CB |
| Testing Feature | Integrated TEST button for functional verification |
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