TL-440 Residual Current Circuit Breaker (RCCB) 4P 40A 300mA
TL-440
The TBC TL-440 is a professional-grade 4-pole Residual Current Circuit Breaker (RCCB) engineered for three-phase electrical distribution systems. Featuring 40A rated current capacity, 10kA breaking capacity, and 300mA earth-leakage sensitivity, this device provides reliable protection against earth faults, ensuring personnel safety and fire prevention in commercial and industrial installations. With electromechanical trip technology and instantaneous response, the TL-440 delivers dependable performance in demanding electrical environments.
Key Features
- 4-pole configuration (3P + N) for three-phase systems
- 40A rated current capacity for medium-load applications
- 10kA breaking capacity for robust fault protection
- 300mA earth-leakage sensitivity (Type AC)
- Instantaneous tripping with no intentional time delay
- Electromechanical trip unit technology for reliable operation
- Built-in TEST button for periodic functional verification
- DIN rail mounting for easy installation
- Manual toggle operation with clear ON/OFF indication
- Wide operating temperature range: -35°C to +70°C
- High mechanical durability: 10,000 cycles
- Electrical durability: 4,000 cycles
- IP20 degree of protection
- Compliant with IEC 60898-1 standards
- TÜV, CE, and CB certified
The TBC TL-440 Residual Current Circuit Breaker is designed to provide essential earth-leakage protection in three-phase electrical distribution systems. This 4-pole RCCB automatically disconnects the circuit when residual current exceeds 300mA, protecting against electric shock hazards and reducing fire risks caused by earth faults.
Engineered with electromechanical trip technology, the TL-440 offers instantaneous response to earth-leakage conditions, with tripping times of less than 0.2 seconds at rated sensitivity and less than 0.04 seconds at 5 times rated sensitivity. The device is suitable for 415V AC systems operating at 50Hz frequency.
Built for durability and reliability, this RCCB features a robust construction capable of withstanding 10,000 mechanical operations and 4,000 electrical operations. The compact design with DIN rail mounting enables straightforward installation in distribution boards and electrical panels.
The integrated TEST button allows maintenance personnel to verify proper operation of the earth-leakage protection mechanism, ensuring ongoing safety compliance. With wide temperature tolerance and high humidity resistance, the TL-440 performs reliably in diverse environmental conditions.
Operating Principle: The TL-440 RCCB operates on the principle of differential current detection. The device continuously monitors the balance between phase and neutral currents. When an earth fault occurs and leakage current exceeds the 300mA threshold, the electromechanical trip mechanism activates, immediately disconnecting all poles to isolate the faulty circuit.
Type AC Classification: This RCCB is classified as Type AC, designed to detect alternating sinusoidal residual currents. It provides protection against the most common types of earth faults in standard AC distribution systems.
Breaking Capacity: With a 10kA breaking capacity, the TL-440 can safely interrupt fault currents up to 10,000 amperes, making it suitable for installations with moderate prospective short-circuit currents.
Tripping Characteristics: The device features instantaneous tripping with no intentional time delay. At rated sensitivity (300mA), tripping occurs in less than 0.2 seconds. At 5 times rated sensitivity (1500mA), response time is less than 0.04 seconds, ensuring rapid protection.
Installation Requirements: The RCCB mounts on standard 35mm DIN rail and occupies 70mm width (approximately 4 modules). Adequate clearance should be maintained around the device for proper ventilation and operation. The IP20 rating requires installation in enclosed panels or distribution boards.
Testing and Maintenance: Regular testing using the built-in TEST button is recommended monthly or as per local regulations. The TEST button simulates an earth fault condition to verify proper mechanical and electrical operation of the protection mechanism.
- Three-phase distribution boards in commercial buildings
- Industrial electrical installations and machinery protection
- Power distribution panels in manufacturing facilities
- Commercial kitchen and food service equipment circuits
- HVAC system protection in large buildings
- Pump and motor control panels
- Workshop and factory electrical systems
- Retail and office building electrical distribution
- Educational institution electrical infrastructure
- Healthcare facility power distribution systems
- Hotel and hospitality electrical installations
- Agricultural and farming equipment protection
| General Specifications | |
|---|---|
| Product Type | Residual Current Circuit Breaker (RCCB) |
| Model Number | TL-440 |
| Product Application | Distribution |
| Control Type | Toggle |
| Trip Unit Technology | Electromechanical |
| Electrical Characteristics | |
|---|---|
| Poles Description | 3P + N (4 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 |
| Breaking Capacity | 10 kA |
| Tripping Characteristics | |
|---|---|
| At 1 × IΔn (300mA) | t < 0.2 s |
| At 5 × IΔn (1500mA) | t < 0.04 s |
| Mechanical & Installation Data | |
|---|---|
| Mounting | DIN Rail (35mm) |
| Mechanical Durability | 10,000 cycles |
| Electrical Durability | 4,000 cycles |
| Operation | Manual toggle with TEST button |
| Dimensions | |
|---|---|
| Height | 90.4 mm |
| Width | 70 mm |
| Depth | 75.3 mm |
| Environmental Conditions | |
|---|---|
| Ambient Air Temperature | −35 °C to +70 °C |
| Relative Humidity | 0 – 95 % |
| Degree of Protection | IP20 |
| Standards & Compliance | |
|---|---|
| Standards | IEC 60898-1 |
| Certifications | TÜV, CE, CB |