Generac RXSW100A3SPD 100A Service-Entrance Automatic Transfer Switch with Surge Protection (NEMA 3R)
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At a glance
- Amperage
- 100A
- Poles
- 2
- Voltage/Phase
- 120/240V single-phase
- Service Entrance Rated
- Yes
- Enclosure
- NEMA 3R aluminum (indoor/outdoor), powder-coated
- Surge Protection
- Integrated whole-house SPD, 50 kA/phase, Type 1 or Type 2, UL 1449 4th Ed. listed
- Transition Type
- Open transition (automatic)
- Withstand Rating
- 10,000A
- Listings
- ETL Listed (ETL us); SPD UL 1449 4th Edition; meets NEC 2020/2023 Art. 230.67
- Lug Range
- 2/0 - #14
- Dimensions
- 20.0" H x 14.6" W x 7.1" D
- Weight
- 22.5 lb (10.2 kg)
- Warranty
- 5-year limited
Why this generator
- Service-entrance rated 100A Smart Switch doubles as your main utility disconnect, simplifying installation at the meter
- Factory-built-in whole-house surge protection (50 kA per phase, UL 1449 Type 1/2) satisfies NEC 2020/2023 Article 230.67 without a separate SPD purchase
- Rugged NEMA 3R aluminum enclosure with baked powder-coat finish is rated for indoor or outdoor mounting
- Integrated Smart A/C Module manages up to 4 HVAC loads out of the box, expandable to 8 more with Generac Smart Management Modules
- Seamless automatic open-transition switching driven by your Generac Evolution or Power Zone controller, handling all timing, sensing, and weekly self-test exercising
- Backed by Generac's 5-year limited warranty with a heavy-duty ETL-recognized contactor built for years of service
Everything you need to know
Generac RXSW100A3SPD 100a service-entrance automatic transfer switch with surge protection (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.
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.