Back to shop
Generac RXSC100A3 100A Non-Service-Entrance Automatic Transfer Switch (NEMA 3R)
TRANSFER SWITCHIncludes ATS
Generac · Automatic Transfer Switch

Generac RXSC100A3 100A Non-Service-Entrance Automatic Transfer Switch (NEMA 3R)

Factory-Authorized Generac Dealer
$539MAP price
Free shipping · ships in 3–5 days
Request Install Quote
Installed in NC or SC?
Pro install available in NC & SC · quote-based
5-yr
warranty
Authorized
dealer
Expert
support
Secure checkout
VISAMCAMEXDISC
Free shipping to the lower 48 · 30-day returns
Specifications

At a glance

Amperage
100A
Voltage/Phase
120/240V single-phase
Service Entrance Rated
No (non-service entrance rated)
Enclosure
NEMA 3R aluminum (indoor/outdoor)
Transition Type
Open transition
Withstand Rating
10,000A
Lug Range
2/0 - #14
Listings
cETLus; UL/CUL-recognized contactor
Dimensions
20.0" H x 14.6" W x 7.1" D
Weight
20 lbs
Warranty
5-year limited
Key Features

Why this generator

  • 100-amp open-transition automatic transfer switch for 120/240V single-phase whole-house backup
  • Integrated Smart A/C Module (SACM) manages up to four 24 VAC-controlled HVAC loads with no additional hardware
  • Designed to pair with Generac air-cooled standby generators using Evolution or Nexus controllers
  • Rugged aluminum NEMA 3R enclosure rated for outdoor or indoor installation
  • Expandable power management - add Smart Management Modules to shed up to 8 additional loads
  • Backed by Generac's 5-year limited warranty with a 10,000A withstand-rated, UL/CUL-recognized contactor
Overview

Everything you need to know

Built by Cummins · Sold by Total Generator Pros

Generac RXSC100A3 100a non-service-entrance automatic transfer switch (NEMA 3R enclosure). 120/240V single-phase, designed to pair with Generac air-cooled home standby generators.

Genuine Generac unit from a factory-authorized dealer. Free shipping to the lower 48. Professional installation available in NC & SC.

FAQ

Frequently asked questions

Is this a genuine OEM part?+

Yes — sold and shipped as a genuine Generac part from a factory-authorized dealer.

Will it fit my unit?+

Check your model and year — message us with that info and we'll confirm fit before you order.

How fast does it ship?+

Free shipping to the lower 48. Most accessories and parts ship within 2–4 business days.

What's the return policy?+

30-day returns on unused parts and accessories in original packaging.

Free curbside shipping

Liftgate delivery to the lower 48. Most orders leave the warehouse in 3–5 business days.

Install help, no upsell

We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.

Real Cummins warranty

Full 5-year / 2,000-hour limited warranty — registered and supported through Cummins directly.

$539
Get Quote