Generac RXSW100A3 100A Service-Entrance Automatic Transfer Switch (NEMA 3R)
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At a glance
- Amperage
- 100A
- Voltage/Phase
- 120/240V, single-phase
- Service Entrance Rated
- Yes
- Enclosure
- NEMA 3R aluminum (indoor/outdoor)
- Transition Type
- Open transition
- Withstand Rating
- 10,000A
- Lug Range
- 2/0 - #14
- Listings
- ETL Listed (ETLus)
- Dimensions
- 20.0" H x 14.6" W x 7.1" D
- Weight
- 22.5 lbs (10.2 kg)
- Warranty
- 5-year limited
Not sure if this fits?
Why this generator
- Service-entrance rated to double as your main utility disconnect — ships with a dead front for a code-compliant install
- Integrated Smart A/C Module manages up to 4 HVAC loads with no extra hardware, expandable to 8 more loads with Smart Management Modules
- Rugged aluminum NEMA 3R enclosure with baked powder-coat finish, rated for indoor or outdoor mounting
- Heavy-duty ETL-recognized Generac contactor with a 10,000A withstand rating
- Pairs with Generac home standby generators using Evolution or Nexus controllers for fully automatic transfer in an outage
- Can be operated manually without power and is backed by a 5-year limited warranty
Everything you need to know
Generac RXSW100A3 100a 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. Ships via calculated freight — shipping shown at checkout (heavy/hazmat item). Professional installation available in NC & SC.
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?+
Low cost ground shipping — calculated at checkout (batteries, transfer switches and oversized items). Most leave the warehouse in 2–4 business days.
What's the return policy?+
30-day returns on unused parts and accessories in original packaging.
Fast nationwide shipping
Low cost ground shipping — calculated at checkout. Most items leave the warehouse in 2–4 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.
Genuine Generac part
Sold and shipped as a genuine Generac OEM part from a factory-authorized dealer. 30-day returns on unused parts in original packaging.