Generac RXSW100A3 100A 1ph-120/240V Service Rated Nema 3R Automatic Transfer Switch

Generac RXSW100A3 100A 1ph-120/240V Service Rated Nema 3R Automatic Transfer Switch Features:

Generac RXSW100A3 100A Automatic Transfer Switch Features:

The Generac RXSW100A3 100A Service-Rated Automatic Transfer Switch is engineered for homeowners who want code-compliant, dependable power transfer during outages. Rated at 100 amps and classified as service-rated, it can serve as the main disconnect in many installations, simplifying the electrical setup. Designed for single-phase 120/240V systems, this switch works seamlessly with Generac Evolution™ or Nexus™ generator controllers to detect utility power drops and automatically engage generator power, then revert when utility service returns.

Built to last under real-world conditions, the RXSW100A3 comes in a NEMA 3R aluminum enclosure with a durable powder-coated finish, making it suitable for outdoor or sheltered indoor installation. It includes a heavy-duty contactor for switching reliability and a Smart A/C Module (SACM) that handles up to 4 HVAC loads (24 VAC) without extra hardware. With optional Smart Management Modules (SMMs), even more loads can be controlled, ensuring critical systems are prioritized while protecting both generator and circuits from overload.

Safety and smooth operation are front and center. The switch employs open-transition switching to prevent both sources (utility and generator) from being connected simultaneously, protecting both your wiring and equipment. All timing and sensing functions—such as voltage pickup/drop-out, re-transfer delay, generator start, and cooldown—are managed by the generator’s controller for consistent performance. Backed by a 5-year limited warranty, this transfer switch gives you both peace of mind and long-term reliability.

Key Features

• Service-rated 100 Amp automatic transfer switch for single-phase 120/240V systems

• Service entrance rated: can act as main disconnect when permitted by local code

• Built-in load management: supports up to 4 HVAC (24 VAC) loads without additional hardware; expandable with SMMs

• NEMA 3R aluminum enclosure with electrostatic, powder-coated finish for durability and weather resistance

• Open-transition switching to safely separate utility and generator power during transfers

• Heavy-duty contactor and rugged internal components designed for frequent switching

• Compatible with Generac Evolution™ and Nexus™ controllers for timing, sensing, and auto-transfer functions

• Clear dimensions and wiring access; compact footprint (~20 in × 14.6 in × 7.1 in)

• Withstand rating ~10,000 amps

• 5-year limited warranty

RXSW100A3 Specifications Sheet
RXSW100A3 Owner's Manual
RXSW100A3 Warranty