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RTSW300A3 - Smart Switch 300 Amp Service Rated 120/240 1Ø NEMA 3R
Features
- Single-phase, 120/240-volt; UL listed
- When used in tandem with Smart Management Modules, up to 8 loads can be managed as well, providing the most installation efficient power management options available.
- Smart Switch 300 Amp SE 1Ø NEMA 3R
- The Heavy Duty Generac Contactor is a UL recognized device, designed for years of service
- Digital Power Technology (DPM) allows these switches to have the capability to manage up to 4 individual HVAC (24 VAC controlled) loads with no additional hardware.
- Service rated (RXSW) Generac Automatic Transfer Switches are housed in an aluminum NEMA/UL Type 3R enclosure, with electrostatically applied and baked powder paint
- Designed for use with single-phase generators 60-kw and below
Certifications and Standards
- UL Listed
Manufacturer Resources
Product Specs
- Amperage:
- 400 A
- Assembled Depth:
- 17 in
- Assembled Height:
- 52 in
- Assembled Weight:
- 130 lbs
- Assembled Width:
- 25 in
- Color Finish:
- Grey
- Country Of Origin:
- United States
- Installation Hardware Included:
- transfer switch
- Installation Instructions Included:
- Yes
- Manufacturer Warranty:
- 5 year limited
- Maximum Generator Input:
- 48000 W
- Overall Depth:
- 17 in
- Overall Height:
- 52 in
- Overall Width:
- 25 in
- Restrictions:
- No
- Department:
- Electrical
- Product Group:
- Power Distribution
- Product Subgroup:
- Transfer Switch
- Product Voltage:
- 120 V
- Product Material:
- Aluminum
- Product Weight:
- 130 lbs
Generac RTSW300A3 – Frequently Asked Questions
1) Can the Generac RTSW300A3 transfer switch be mounted outdoors?
Yes. The RTSW300A3 is built in an aluminum NEMA/UL Type 3R enclosure with electrostatically applied, baked powder paint, so it is rated for outdoor wall mounting alongside the meter or main. The housing is grey.
2) Does this Generac Smart Switch work as the service disconnect, or do I still need a separate main?
It is service rated, so it can serve as the service entrance disconnect on a single-phase 120/240-volt service. That is the point of the RXSW/service-rated Generac switches: the utility feed lands in the switch itself rather than requiring a separate upstream service disconnect. Confirm with your AHJ how they want the service entrance configured before rough-in.
3) What size standby generator can I run on a Generac RTSW300A3?
It is intended for single-phase generators 60 kW and below, with a maximum generator input of 48,000 watts on record. If your unit is three-phase, this is the wrong switch.
4) Can I shed HVAC loads with this switch without buying extra modules?
Yes, up to four. Digital Power Management built into the RTSW300A3 manages four individual 24 VAC controlled HVAC loads with no additional hardware. Add Generac Smart Management Modules and the switch will manage up to eight loads total, which is how you keep a smaller generator sized for a large house or small commercial building.
5) Will a Generac RTSW300A3 work on a 208Y/120 three-phase service?
No. This is a single-phase 120/240-volt switch. For a three-phase service you need a three-phase Generac transfer switch matched to your service voltage; putting a single-phase switch on a three-phase feed is not a configuration that works.
6) How much wall space do I need for the Generac RTSW300A3 enclosure?
Plan on 52 inches high, 25 inches wide and 17 inches deep. It weighs 130 pounds, so it is a two-person set and the wall or unistrut backing has to carry that load before conductors are landed.
7) Is the Generac RTSW300A3 UL listed for permitted work?
Yes, the switch is UL listed, and the heavy duty Generac contactor inside it is a UL recognized device. That is the documentation most inspectors want to see on a service-rated automatic transfer switch.
8) Does the Generac RTSW300A3 come with installation instructions and mounting hardware?
Installation instructions ship with the switch, and the transfer switch hardware is included. Conduit, fittings, conductors, lugs beyond what the switch provides, and the generator control wiring are job-supplied.
9) Is the Generac RTSW300A3 made in the USA for a Buy American spec?
Country of origin on record is the United States. If the project carries a formal Buy American or BABA certification requirement, request the manufacturer's certificate for the specific production lot.
10) What is the exact part number to order this Generac smart transfer switch?
Generac model and MPN RTSW300A3, the service-rated 120/240 single-phase smart switch in the NEMA 3R aluminum enclosure. There is one configuration, so there is no finish, voltage or enclosure option to specify on the order.
How fast can I get the Generac RTSW300A3 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Generac RTSW300A3 come with a warranty?
Absolutely. The Generac RTSW300A3 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Generac RTSW300A3?
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