Hager SPA312 Type 1+2+3 Surge Protective Device, 3-Pole, 12.5 kA, TN-C, DIN Rail

With an impulse current rating of 12.5 kA per pole (10/350 µs), the Hager SPA312 delivers robust protection against direct lightning strikes in TN-C systems.

Overview

The Hager SPA312 is a combined Type 1+2+3 surge protective device (SPD) engineered for three-phase TN-C power distribution systems. It is designed for DIN rail mounting and occupies 3 modules (TE). The device provides a maximum continuous operating voltage of 275 V AC and a voltage protection level below 1.5 kV, ensuring sensitive equipment is shielded from transient overvoltages.

What stands out

• High impulse current withstand: 12.5 kA per pole (10/350 µs)
• Combined Type 1+2+3 protection for comprehensive defense
• Remote signaling contact for status monitoring
• Integrated disconnector for safe isolation
• Visual status indication (green/red)

Technical details

• Number of poles: 3
• Earthing system: TN-C
• Nominal discharge current (In): 20 kA per pole (8/20 µs)
• Maximum discharge current (Imax): 50 kA per pole (8/20 µs)
• Rated voltage (Un): 230/400 V AC
• Response time: < 25 ns
• Maximum backup fuse: 160 A gG
• Operating temperature range: -25 to +60 °C

Our verdict

A high-performance surge arrester for industrial and commercial TN-C installations, offering reliable protection with remote monitoring capability.