Hager SPA800Z Combined Surge Arrester Type 1+2+3, 3-Pole, 12.5kA Iimp, TNC, 230/400V AC

With an impulse current rating of 12.5 kA per pole (10/350 µs), the Hager SPA800Z delivers robust protection against direct lightning strikes in TNC earthing systems. This 3-pole combined surge arrester integrates Type 1, Type 2, and Type 3 protection in a single DIN-rail module, reducing installation space while safeguarding electrical installations from transient overvoltages.

Overview

The SPA800Z is engineered for low-voltage power distribution systems where the neutral and protective earth conductors are combined (TNC). It operates at a nominal voltage of 230/400 V AC with a maximum continuous operating voltage of 255 V AC. The device features a visual status indicator (green/red) for quick health checks and mounts on a standard DIN rail with a width of 5.5 modules (99 mm).

What stands out

• High discharge capacity: 12.5 kA impulse current (Iimp) per pole, total 37.5 kA.
• Nominal discharge current (In) of 20 kA and maximum discharge current (Imax) of 50 kA per pole.
• Low voltage protection level (Up) below 1.3 kV for sensitive equipment.
• Fast response time under 25 nanoseconds.
• Designed for TNC earthing systems, ensuring compatibility with specific network configurations.

Technical details

• Arrester type: Combined surge arrester (Type 1 + Type 2 + Type 3)
• Number of poles: 3
• Earthing system: TNC
• Nominal voltage (Un): 230/400 V AC
• Max. continuous operating voltage (Uc): 255 V AC
• Impulse current (Iimp) (10/350 µs): 12.5 kA per pole
• Total impulse current (Iimp total): 37.5 kA
• Nominal discharge current (In) (8/20 µs): 20 kA per pole
• Max. discharge current (Imax) (8/20 µs): 50 kA per pole
• Voltage protection level (Up): < 1.3 kV
• Response time: < 25 ns
• Mounting type: DIN rail
• Module width: 5.5 TE (99 mm)
• Degree of protection: IP20
• Operating temperature range: -40 to 80 °C
• Status indication: Visual (green/red)
• Short-circuit withstand capability (Isccr): 50 kA (with upstream fuse)
• Standards: EN 61643-11

Our verdict

The Hager SPA800Z is a high-performance surge protection solution for TNC systems, offering comprehensive Type 1+2+3 protection with impressive discharge ratings and a compact design. Its fast response and low voltage protection level make it suitable for critical installations where equipment uptime is paramount.