TL-240 Residual Current Circuit Breaker (RCCB) 2P 40A 300mA
TL-240
The TBC TL-240 is a high-performance 2-pole Residual Current Circuit Breaker (RCCB) engineered to deliver superior protection against earth-leakage faults in residential, commercial, and light industrial electrical installations. With a rated current of 40A and 300mA sensitivity, this RCCB automatically disconnects the circuit when residual current exceeds safe levels, preventing electric shock and minimizing fire risk. Built to IEC 60898-1 standards and certified by TÜV, CE, and CB, the TL-240 ensures reliable safety and compliance for modern electrical distribution systems.
Key Features
- 2-pole (1P+N) configuration for comprehensive circuit protection
- 40A rated current capacity suitable for high-load applications
- 300mA earth-leakage sensitivity for effective fault detection
- 10kA breaking capacity for robust short-circuit protection
- Type AC earth-leakage protection class for standard AC applications
- Instantaneous tripping with fast response times (< 0.2s at 1×IΔn)
- Electromechanical trip unit technology for reliable operation
- Integrated TEST button for periodic functional verification
- DIN rail mounting for easy installation and maintenance
- Wide operating temperature range (-35°C to +70°C)
- Compact design: 35mm width for space-efficient installation
- High mechanical durability: 10,000 cycles
- IP20 degree of protection
- Compliant with IEC 60898-1 and certified by TÜV, CE, and CB
The TBC TL-240 Residual Current Circuit Breaker represents a critical safety component in modern electrical distribution systems. Designed to detect and respond to earth-leakage currents, this 2-pole RCCB provides essential protection against electric shock hazards and potential fire risks caused by ground faults.
Featuring a 40A rated current capacity and 300mA sensitivity threshold, the TL-240 is ideally suited for applications requiring protection of circuits with higher current demands while maintaining effective earth-leakage detection. The device operates on the principle of monitoring the balance between phase and neutral currents, instantly disconnecting the circuit when an imbalance exceeding 300mA is detected.
The electromechanical trip unit ensures reliable operation without requiring external power, while the instantaneous tripping mechanism provides rapid response times—less than 0.2 seconds at rated sensitivity and less than 0.04 seconds at 5 times rated sensitivity. This fast response is crucial for minimizing the duration of dangerous fault conditions.
Built for versatility, the TL-240 operates across a wide temperature range from -35°C to +70°C, making it suitable for diverse environmental conditions. The compact 35mm width allows for efficient use of panel space, while DIN rail mounting ensures quick and secure installation. With 10,000 mechanical cycles and 4,000 electrical cycles, this RCCB delivers long-term reliability and reduced maintenance requirements.
Regular testing is simplified through the integrated TEST button, which allows users to verify proper operation of the earth-leakage protection function, ensuring ongoing safety compliance and peace of mind.
Operating Principle: The TL-240 RCCB operates by continuously monitoring the current balance between the phase and neutral conductors. Under normal conditions, the current flowing through the phase conductor equals the current returning through the neutral. When an earth-leakage fault occurs, some current flows to ground, creating an imbalance. The RCCB's electromechanical sensing mechanism detects this residual current and, when it exceeds the 300mA threshold, triggers the trip mechanism to disconnect the circuit.
Type AC Classification: This RCCB is classified as Type AC, meaning it is designed to detect alternating sinusoidal residual currents. It is suitable for standard residential and commercial applications where loads are predominantly resistive or inductive with sinusoidal current characteristics.
Breaking Capacity: With a 10kA breaking capacity, the TL-240 can safely interrupt fault currents up to 10,000 amperes, providing robust protection even in installations with relatively high prospective short-circuit currents.
Tripping Characteristics: The device features instantaneous tripping with no intentional time delay. At the rated sensitivity (1×IΔn = 300mA), the tripping time is less than 0.2 seconds. At 5 times the rated sensitivity (5×IΔn = 1500mA), the tripping time is less than 0.04 seconds, ensuring rapid disconnection during more severe fault conditions.
Installation Requirements: The TL-240 is designed for DIN rail mounting in electrical distribution boards and control panels. It requires proper connection of phase, neutral, and load conductors according to the terminal markings. The device should be installed in a location with adequate ventilation and protection from moisture, dust, and corrosive substances, consistent with its IP20 rating.
Testing and Maintenance: The integrated TEST button should be operated monthly to verify correct operation. Pressing the TEST button creates an artificial earth-leakage condition that should cause the RCCB to trip. If the device fails to trip during testing, it should be replaced immediately. Regular visual inspection for signs of damage, overheating, or loose connections is also recommended.
- Residential electrical distribution boards and consumer units
- Commercial building electrical installations and sub-distribution panels
- Light industrial control panels and machinery circuits
- Office buildings and retail spaces requiring earth-leakage protection
- Educational facilities and institutional buildings
- Healthcare facilities for non-critical circuits
- Hospitality sector installations including hotels and restaurants
- Workshop and garage electrical systems
- Agricultural buildings and farm installations
- Renovation and retrofit projects requiring enhanced electrical safety
- Circuits supplying outdoor equipment and temporary installations
- Protection of circuits with higher current demands up to 63A
| Parameter | Specification |
|---|---|
| Product Type | Residual Current Circuit Breaker (RCCB) |
| Model Number | TL-240 |
| Product Application | Distribution |
| Control Type | Toggle |
| Poles Description | 1P + N (2 Pole) |
| Rated Current (In) | 40 A |
| Rated Voltage (Un) | 415 V AC |
| Frequency | 50 Hz |
| Network Type | AC |
| Earth-Leakage Sensitivity (IΔn) | 300 mA |
| Earth-Leakage Protection Class | Type AC |
| Earth-Leakage Protection Time Delay | Instantaneous |
| Trip Unit Technology | Electromechanical |
| Breaking Capacity | 10 kA |
| Tripping Time at 1 × IΔn | < 0.2 s |
| Tripping Time at 5 × IΔn | < 0.04 s |
| Mounting Type | DIN Rail |
| Mechanical Durability | 10,000 cycles |
| Electrical Durability | 4,000 cycles |
| Operation | Manual toggle with TEST button |
| Height | 90.4 mm |
| Width | 35 mm |
| Depth | 75.3 mm |
| Ambient Air Temperature | -35°C to +70°C |
| Relative Humidity | 0 – 95% |
| Degree of Protection | IP20 |
| Standards Compliance | IEC 60898-1/ TÜV/CE/ CB |