The TBC TM-263 is a high-performance 2-pole Residual Current Circuit Breaker (RCCB) engineered to safeguard electrical installations against dangerous earth-leakage faults. With a rated current of 63A and 100mA sensitivity, this device automatically disconnects the circuit when residual current exceeds safe levels, providing essential protection against electric shock and reducing fire risk in residential, commercial, and light industrial applications. Built to IEC 60898-1 standards and certified by TÜV, CE, and CB, the TM-263 ensures reliable safety and compliance for modern electrical distribution systems.
The TBC TM-263 Residual Current Circuit Breaker represents a critical safety component in modern electrical distribution systems. Designed with precision engineering and manufactured to international standards, this RCCB provides instantaneous protection against earth-leakage currents that could result in fatal electric shock or electrical fires.
This 2-pole device is specifically designed for single-phase AC networks operating at 240V, 50/60Hz. The Type AC earth-leakage protection class ensures effective detection of alternating sinusoidal residual currents, making it ideal for standard residential and commercial installations. The electromechanical trip unit technology delivers reliable, maintenance-free operation without requiring external power supply.
With its compact 35mm width and standard DIN rail mounting, the TM-263 integrates seamlessly into existing distribution boards and control panels. The robust construction ensures consistent performance across a wide temperature range, while the IP20 degree of protection makes it suitable for indoor electrical enclosures.
The integrated TEST button allows users and maintenance personnel to verify proper operation of the earth-leakage protection mechanism, ensuring ongoing safety compliance and peace of mind.
Operating Principle:
The TBC TM-263 RCCB operates on the principle of differential current detection. It continuously monitors the balance between phase and neutral currents. When an earth-leakage fault occurs (such as current flowing through a person to ground), the device detects the imbalance and trips instantaneously when the residual current exceeds 100mA.
Type AC Classification:
This device is classified as Type AC, meaning it is designed to detect and respond to alternating sinusoidal residual currents. It is suitable for resistive and inductive loads commonly found in residential and commercial environments.
Tripping Characteristics:
The TM-263 features instantaneous tripping with no intentional time delay. At the rated sensitivity (100mA), the device trips in less than 0.2 seconds. At 5 times the rated sensitivity (500mA), tripping occurs in less than 0.04 seconds, providing rapid protection against dangerous fault conditions.
Breaking Capacity:
With a 6kA breaking capacity, this RCCB can safely interrupt fault currents up to 6,000 amperes, making it suitable for typical residential and light commercial installations where prospective short-circuit currents are within this range.
Durability & Reliability:
The device is rated for 10,000 mechanical operations and 4,000 electrical operations under load, ensuring long service life in demanding applications. The electromechanical design requires no external power and maintains protection even during power outages.
Installation & Maintenance:
Standard 35mm DIN rail mounting enables quick installation. The TEST button should be operated monthly to verify correct operation. No routine maintenance is required beyond periodic testing and visual inspection.
| 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) | 100 mA |
| Earth-Leakage Protection Class | Type AC |
| Tripping Time | 1 × IΔn: t < 0.2 s 5 × IΔn: t < 0.04 s |
| Earth-Leakage Time Delay | Instantaneous |
| Trip Unit Technology | Electromechanical |
| Breaking Capacity | 10 kA |
| 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 | |
|---|---|
| Standards | IEC 60898-1 and certified by TÜV, CE, and CB |
| Testing | Equipped with TEST button for functional verification |
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