Product overview - Next Generation Automatic Transfer Switch

The Next Generation Automatic Transfer Switch (ATS) lineup is designed to complement Generac’s latest Home Standby Generators and Energy Management platform. These updated residential automatic transfer switches focus on enhanced reliability, simplified installation, and a modernized appearance while introducing integrated surge protection options.

Model variants

The first phase of the new lineup includes 9 total models covering Service Entrance (SE), Non-Service Entrance (NSE) and the 200A transfer switch that is bundled with 14-28kW air-cooled Generac Standby Generators.

ATS model variant table

Category	Description	Previous model	New model number
Service Entrance – No SPD	100A Service Entrance	RXSW100A3	RXSW100A3
	150A Service Entrance	RXSW150A3	G0099550
	200A Service Entrance	RXSW200A3	G0099520
Service Entrance – With SPD	100A Service Entrance + SPD	RXSW100A3SPD	RXSW100A3SPD
	150A Service Entrance + SPD	New configuration	G0099540
	200A Service Entrance + SPD	RXSW200A3SPD	G0099510
Non-Service Entrance	100A NSE	RXSC100A3	RXSC100A3
	200A NSE	RXSC200A3	G0099530
Bundle option	200A Bundle w/ SPD	Various Guardian bundle models	Various Next Gen bundle models

Main new features

Below is a summary of key improvements introduced with the Next Generation Residential ATS.

1. Replacement of SACM with new Fuse Control Module (FCM)

• Increases performance and reliability compared to legacy Smart AC Module (SACM).
• New FCM improves electrical durability and reduces susceptibility to miswiring.
• Adds integrated brownout protection using a PTC fuse.
• Supports improved compatibility with the updated contactor system.

2. Better brownout protection

• The new PTC acts an in-circuit fuse, thereby protecting the FCM and system from brownout conditions.
• Automatically resumes operation once power conditions normalize.
• Helps prevent switch or generator controller failures caused by low-voltage events.

3. Integrated Surge Protection Device (SPD)

• First residential ATS to offer a factory-installed whole-home SPD (varies by model). For more information, see What is a Surge Protection Device?.
• Reduces installation time by eliminating the need for a separately mounted device.
• Provides 5-year warranty protection when integrated. See Does My Automatic Transfer Switch Carry the Same Warranty as My Home Standby Generator?.
• Addresses increasing requirements for surge protection under NEC 2020/2023.

4. New color and modernized appearance

• Standardized Metro Gray finish across the product line.

5. Warranty enhancements

• Integrated SPD models include a 5-year warranty for the full transfer switch inclusive of the SPD device. Generac's standalone SPD module includes a 2-year warranty. For warranty details, see transfer switch warranty coverage.
• Standard ATS warranty remains 5 years. To download warranty statements, see Where can I find warranty information about Generac products?.

6. Smoother and faster installation (new mounting plates)

• Installer Fast-Mount cleat system allows the enclosure to hang securely before final fastening.
• Reduces the need to hold the enclosure in place during installation.
• Saves approximately 10–30 minutes of install time depending on configuration.
• Designed for flexibility across different wall materials.

See also

• What is a Surge Protection Device?
• What’s the Difference Between a Service-Entrance Rated and Non-Service-Entrance Rated Transfer Switch?
• Does My Automatic Transfer Switch Carry the Same Warranty as My Home Standby Generator?
• Where can I find warranty information about Generac products?
• Find a servicing dealer using the dealer locator
• Find manuals and product information on the product lookup page