Surge-Trap® Surge Protection Devices

Surge-Trap® Monobloc STMT1 Series - 50kA


The Surge-Trap® Monobloc STMT1 Series is the most robust series of single pole Type 1/Class I lightning current arresters, able to discharge energy (current) from a direct lightning strike (10/350µs) on an external lightning protection system (LPS) or overhead supplies, in accordance with EN/IEC 61643. Suitable as the first step of protection in incoming power supply panels and areas with high exposure to lightning strikes, fitted with an external lightning protection system.

  • Lightning impulse current (10/350μs): 50kA

  • Follow current quenching capacity (Ifi): 50kA

  • Leakage current free (LCF)

  • Multi-discharge technology

  • Single pole devices for TNS, TNC, IT and TT earthing systems

  • Un(L-N/L-L): 120/208V, 230/400V, 277/480V, 400/690V

  • DIN-rail mountable, monobloc format

  • Back-up fuse: 500 A gG