HAGER SPA412 Combined Surge Arrester Type 1+2+3, 12.5kA, TNS/TT, 4-Pole, 230/400V

For electrical contractors and facility managers protecting three-phase installations in commercial and industrial buildings, the HAGER SPA412 combined surge arrester provides comprehensive protection against transient overvoltages. Suitable for TNS and TT network configurations, this 4-pole device integrates Type 1+2+3 protection in a compact 4-module DIN rail housing.

Key specifications

• Arrester type: Combined surge arrester Type 1+2+3
• Network configuration: TNS, TT
• Nominal voltage (Un): 230/400 V AC
• Max. continuous operating voltage (Uc): 275 V AC
• Impulse current (Iimp) (10/350 µs): 12.5 kA per pole
• 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): < 1.5 kV
• Short-circuit withstand capability (Isccr): 50 kA
• Response time: < 25 ns
• Number of poles: 3P+N (4-pole protection)
• Module width: 4 TE (modules)
• Mounting type: DIN rail (35 mm)
• Status indication: Visual (green/red)
• Max. upstream fuse: 160 A gG
• Operating temperature range: -40°C to +80°C
• Protection degree: IP20
• Standards compliance: EN 61643-11

Why choose it

This arrester combines high discharge capacity with fast response, ensuring reliable protection for sensitive equipment against lightning strikes and switching overvoltages. The visual status indicator allows quick inspection, and the compact design saves space in distribution boards.

Ideal use cases

• Main distribution boards in commercial buildings
• Industrial installations with TNS or TT earthing systems
• Protection of three-phase power supplies for critical equipment

Good to know

The SPA412 is compliant with EN 61643-11 and can be installed on standard 35 mm DIN rails. Its IP20 rating means it is intended for installation inside an enclosure.