Surgelogicâ„¢ Type IMA systems are internal surge protection devices with a focus on service entrance and critical branch panel surge suppresion. This unit provides surge suppression from transient service entrance panels to point-of-use equipment. Being modular in design, this unit is able to achieve superior surge suppression both on the line and load side including at the branch panel. This SPD takes up 13.5 inches mounting height in I-Line panelboard. With a surge current rating of 120,000 Amps and enhanced EMI/RFI filtering and 100kAIC SCCR. Designed for 480Y/277VAC three phase systems. This product is UL and CSA certified.