Description
SPD4 Type 2 & 3 Surge Protection Device
SPD4 Type 2 & 3 Surge Protection Device is designed to protect electrical installations from transient overvoltages caused by lightning strikes and switching events. Suitable for TN-C, TN-S and TT systems, this compact DIN rail mounted SPD delivers reliable performance across a wide range of applications.
With dual LED status indication and integrated remote changeover contacts, the SPD4 ensures clear monitoring and easy integration into modern electrical systems. Its robust design and compliance with BS EN 61643-11 make it a dependable choice for both residential and commercial installations.
Key Features
- Type 2 & 3 surge protection device
- Compliant with BS EN 61643-11
- Suitable for TN-C, TN-S and TT systems
- Dual LED indication – green (active), red (fault)
- Remote changeover contacts included
- DIN rail mountable (35mm)
- Compact 4-module design
Technical Specifications
- Maximum continuous voltage (Uc): 275V
- Nominal discharge current (In 8/20µs): 20kA
- Maximum discharge current (Imax 8/20µs): 40kA
- Voltage protection level (Up): ≤1.3kV
- Response time: ≤25ns
- Operating temperature: -40°C to +80°C
- Minimum backup fuse/MCB: 32A
- Minimum cable size: 6mm²
Installation & Applications
The SPD4 is ideal for installation in distribution boards and consumer units where surge protection is required. Its DIN rail mounting and compact footprint make it suitable for installations where space is limited, while remote contacts allow integration into monitoring systems.
This device is commonly used in domestic, commercial and industrial environments to safeguard sensitive electrical equipment from voltage spikes.
