TDX 300 S 277/480

Product Specification

Product Name – Surge Protection Device (TDX 300 S 277/480)
Nominal System Voltage – 277/480V
Distribution System – 3Ph 4W+G
Max Continuous Operating Voltage – 320/550 VAC
Short Circuit Current Rating(SCCR) – 200kA
Max Discharge Current(Imax),per Phase – 300kA
Voltage Protection Rating (VPR),L-N – 1200V@3kA
Protection Modes – L-N,L-PE,N-PE
Lead Size – 5.26 mm²
Size – 260mm x 257mm x 83mm
Unit weight – 5.9  kg



  • Transient Discriminating (TD) Technology provides increased service life
  • Modular design allows easy replacement of surge modules
  • Built-in features include TD Technology, thermal protection, short circuit current cartridge fusing and a surge counter
  • Status indication flag per mode, voltage presence LEDs, audible alarm and voltage-free contacts providing remote status monitoring
  • 300 kA 8/20µs maximum surge rating provides protection suitable for service entrance, main-distribution panels and highly exposed applications.


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