EATON SPBT12-280/4 Surge Protective Device Type 1+2 4-Pole 12.5kA 1.5kV TN/TNS

The EATON SPBT12-280/4 is a high-performance combined Type 1 and Type 2 surge protective device (SPD) designed for main distribution boards in TN and TNS earthing systems. It provides robust protection against both direct lightning strikes (10/350 µs) and switching surges (8/20 µs), ensuring the safety and reliability of your electrical installation.

Advantages

Combined Type 1+2 protection in a single device saves space and installation costs. With a high impulse current rating of 12.5 kA and a maximum discharge current of 50 kA, it offers superior protection for sensitive equipment. The visual status indication (green/red) allows for easy monitoring of operational status.

Suitable for

• Main distribution boards in residential, commercial, and industrial buildings
• TN and TNS earthing systems
• Protection against lightning and switching surges

Key specifications

• SPD Type: Type 1 + Type 2 (Combined)
• Number of Poles: 4-pole
• Nominal System Voltage (Un): 230/400 V AC
• Maximum Continuous Operating Voltage (Uc): 280 V AC
• Impulse Current (Iimp) (10/350 µs): 12.5 kA
• Nominal Discharge Current (In) (8/20 µs): 20 kA
• Maximum Discharge Current (Imax) (8/20 µs): 50 kA
• Voltage Protection Level (Up): ≤ 1.5 kV
• Earthing System Compatibility: TN-S, TT, TN-C-S
• Mounting Type: DIN Rail
• Module Width: 4 TE (72 mm)
• Short-Circuit Withstand Capability (Isccr): 50 kA
• Follow Current Extinguishing Capability (Ifi): 100 A (N-PE)
• Operating Temperature Range: -40 to +80 °C
• Protection Mode: L-N, N-PE
• Status Indication: Visual (Green/Red)
• Standards Compliance: IEC/EN 61643-11

Recommendations

For optimal protection, install this SPD at the main distribution board and ensure proper coordination with downstream surge protectors. Always follow local electrical codes and manufacturer guidelines.