Generac Smart Switch 400 Amp Service Rated 120/240 1Ø NEMA 3R with SPD

Generac 400 Amp Service Rated Automatic Transfer Switch with SPD (model 9979 / G0099790). Open-transition service-entrance-rated transfer switch for large single-phase services, with Generac's whole-house surge protection device built into the switch. The current replacement for the former RTSW400A3.

Key Specs

• 400 A open-transition switch, 120/240 V single phase, service entrance rated
• Built-in whole-house surge protection device (SPD) with thermally protected MOVs
• For generators with Evolution, Power Zone 200, or Power Zone 410 controllers; all timing, sensing, and transfer commands from the generator controller
• Heavy-duty ETL-recognized Generac contactor
• Aluminum NEMA 3R enclosure with baked powder paint
• 48.0 x 21.8 x 10.2 in overall, 140 lb
• 5-year limited warranty

Questions about sizing a standby generator or pairing the right transfer switch? Call 888-244-2979 and our team will help you match the system to your home before you buy.