The Square D™ SDSA2040 is a Surgelogic™ Type 1 surge protective device rated at 40 kA peak surge current per phase, designed for 3-phase, 4-wire 208Y/120 VAC systems. It offers a 200 kA short circuit current rating (SCCR) with a panel mount design in a NEMA 4X enclosure. Easy plug-in installation using two pole spaces in QO™ or Homeline™ load centers or NQ panelboards. Field-proven MOV design provides response time under 50 nanoseconds. UL 1449 Type 1 Listed. Complies with NEC Article 285 and CSA standards. Ideal for commercial and industrial 3-phase service entrance surge suppression.
