All products

Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use

We independently review everything we recommend. When you buy through our links, we may earn a commission. As an Amazon Associate I earn from qualifying purchases. Learn more ›

Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.

If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use

Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use

5

4 ratings

View on AMAZON

Highlights

  • Seamless Power Transitions: Ensure uninterrupted power supply during outages with this 400 Amp Automatic Transfer Switch. Designed for use with single-phase generators, this transfer switch seamlessly transfers power from utility to generator
  • Advanced Digital Power Management: Utilize cutting-edge digital power technology (DPM) to manage up to 4 individual HVAC loads with no additional hardware. Equipped to provide efficient and intelligent power distribution for your essential home systems
  • Long-Term Assurance: Count on lasting performance and reliability with our 5-Year Limited Warranty. This assurance provides you with the confidence that your investment in an automatic transfer switch is one that will serve you well for years to come
  • Reliable Service Disconnect: Features a built-in service disconnect and is UL Listed, offering a device that interrupts excessive voltage and allows for manually disconnecting your home or business from the electrical utility
  • Trusted Generac Quality: Rely on the #1 selling home standby generator brand for your power needs. Whether for your home, business, or personal use, Generac provides best-in-class power products, ensuring peace of mind and reliable performance
  • Easy Installation: Generac recommends your new transfer switch to be installed by a certified and licensed electrician. Measures 10.0" x 48.0" x 21.8" overall and mounting holes are 42.9" x 16.7"

Description

The Generac RTSY400A3 300-Amp 120-240-Volt Single Phase Nexus Automatic Transfer Switch comes with service disconnect, rated NEMA 3R and works in tandem with the generator to monitor the utility power. When utility power is interrupted, the transfer switch automatically transfers power from the utility to the generator. When utility power returns, the transfer switch will return the electrical load from the generator back to utility. Use with Generac generators 25-60-Kilowatt for whole house or small business backup. The Generac RTSY400A3 is engineered with Generac's digital load management (DLM) technology, the Nexus Smart Switch is the smartest transfer switch on the market. It has the ability to cycle on and off two air conditioners without adding additional components, allowing for a smaller generator to cover more circuits than when paired with a standard transfer switch. The Generac RTSY400A3 300-Amp 120-240-Volt Single Phase Nexus Automatic Transfer Switch with Service Disconnect is UL, CUL listed, measures 10.06-Inch by 48-Inch by 21.82-Inch, weighs 140-pounds and comes with a 2-year limited warranty. Generac manufactures the widest range of power products in the marketplace including portable, RV, residential, commercial and industrial generators. At Generac, we protect the things that power your life by providing quality, affordable power solutions.

Photos

Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use
Generac RTSW400A3 400 Amp Single Phase Generator Automatic Transfer Switch - Service Entrance Rated - NEMA 3R Outdoor Rated Aluminum Enclosure - Power Management for Indoor and Outdoor Use

Product specs

SpecificationDetails
Product Dimensions ‏‎ 10.6 x 21.82 x 48 inches; 37 Pounds
Item model number ‏‎ RTSW400A3
Department ‏‎ Unisex Adult
Date First Available ‏‎ March 27, 2013
Manufacturer ‏‎ Generac Power Systems Inc -- DROPSHIP
ASIN ‏‎ B00C2LV8QA
Country of Origin ‏‎ USA
Operation ModeSmart Switch
Current Rating400 Amps
Operating Voltage240 Volts
Contact TypeNormally Open
Connector TypePlug In
BrandGenerac
TerminalPhysical
Item dimensions L x W x H10.6 x 21.82 x 48 inches
Circuit Type3-way
Actuator TypeMomentary Maintained Contactors
Switch Type AutomaticMaterial Steel
Mounting Type Plug In MountSpecification Met Nema

Related

New York Garden is customer-supported. When you buy products through our site, we may earn an affiliate commission on featured products.

New York Garden

© 2025 New York Garden. All rights reserved. Time Zone: Pacific Time (US & Canada).