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Generac 400 Amp Service Rated 120/240-Volt Single Phase NEMA 3R Smart Transfer Switch RTSW400A3 Discussion

Generac Product Discussion
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Generac 400 Amp Service Rated 120/240-Volt Single Phase NEMA 3R Smart Transfer Switch

Generac 400 Amp Service Rated 120/240-Volt Single Phase NEMA 3R Smart Transfer Switch, large image number 0
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Generac Generac Brand Page
SKU# RTSW400A3
3.3 out of 5 Customer Rating
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About this product

Generac 400 Amp Service Rated 120/240-Volt Single Phase NEMA 3R Smart Transfer Switch

Generac Automatic Transfer Switches are designed for use with single phase generators that utilize Evolution or Nexus Controllers. The 100, 200 and 400 amp open transition switches are available in single phase in both service equipment rated and non-service equipment rated configurations. The 150 and 300 amp open transition switches are only available in a service rated equipment configuration.

California Proposition 65 Warning.
View Warning Label

Features

Service rated (RXSW) Generac Automatic Transfer Switches are housed in an aluminum NEMA/UL Type 3R enclosure, with electrostatically applied and baked powder paint
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
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
Designed for use with single-phase generators 60-kw and below
Single-phase, 120/240-volt; UL listed
400 Amp Service Rated 120/240-Volt Single Phase NEMA 3R Smart Transfer Switch

Specifications

Brand Name
Generac
Amperage (A)
400
Application
400 Amp Whole House
Assembled Weight (lbs)
130
Brand / Model Compatibility
Generac
California Proposition 65 Warning Required
Yes
Color
Gray
Compatibility
Large Residential or Commercial Standby Generator
Country of Origin
United States
Material
Aluminum
Overall Depth (in)
17
Overall Height (in)
52
Overall Width (in)
25
Package Contents
transfer switch,Installation Instructions
Phase
Single Phase

Product Condition
New

UL Listed
Yes
Voltage
120/240
Warranty Type
5 Years Limited
Weight (lbs)
130

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2 Comments

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Ramon Mesa
2026-09-08T16:54:45.601Z Joined September 2026

hello, is this equipment Service Entrance Rated? does it have a 400Amp Main for the Service side?

1
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Duster Tools
Emblem
2026-09-08T18:23:34.131Z Joined February 2026

Hello, yes, the RTSW400A3 is a Service Entrance Rated Transfer Switch, and because of that rating, it includes the 400 Amp Utility Service Circuit Breaker.

0