Eaton Surge Arrester for 40mm Busbar SPZT123-300/3+NPE

The Eaton SPZT123-300/3+NPE is a Type 2 surge arrester designed for installation on 40mm busbar systems in main and sub-distribution boards. It provides comprehensive protection against transient overvoltages for three-phase networks with neutral and PE conductors, ensuring the safety and reliability of your electrical infrastructure.

Advantages

High discharge capacity with nominal current of 20 kA and maximum of 40 kA ensures robust protection. Compact design for easy mounting on 40mm busbars. Visual status indication (green/red) allows quick inspection. Complies with IEC/EN 61643-11 standards for quality and safety.

Suitable for

• Main distribution boards in commercial and industrial buildings
• Sub-distribution boards requiring Type 2 surge protection
• Three-phase TN-S and TN-C-S systems

Key specifications

• Type: Type 2
• Nominal discharge current (In): 20 kA (8/20 µs)
• Maximum discharge current (Imax): 40 kA (8/20 µs)
• Maximum continuous operating voltage (Uc): 300 V AC
• Voltage protection level (Up): <1.5 kV
• Number of poles: 3+NPE
• Mounting: 40mm busbar
• Technology: Varistor (MOV)
• Short-circuit withstand capability (Isccr): 50 kA (with upstream fuse)
• Rated voltage (Un): 230/400 V AC
• Degree of protection: IP20
• Operating temperature: -40 to +80 °C
• Housing material: Thermoplastic, flame retardant
• Standards: IEC/EN 61643-11

Recommendations

For optimal protection, install this surge arrester in conjunction with a suitable upstream fuse. Ensure proper grounding and bonding according to local electrical codes. Regular visual inspection of the status indicator is recommended.