Generac 9935 100A 1ph-120/240V Nema 3R Automatic Transfer Switch Features:
Generac 9935 100A Automatic Transfer Switch (1Ø, 120/240V)
The Generac 9935 100 Amp Automatic Transfer Switch is designed to deliver seamless, hands-free power management during outages. Built specifically for compatibility with Generac standby generators utilizing Evolution™, Power Zone™ 200, and Power Zone™ 410 controllers, this switch automatically detects utility power loss and initiates generator startup within seconds. Once power is restored, it safely transfers your electrical load back to utility service—ensuring uninterrupted protection for your home or business.
Engineered for reliability and long-term performance, this 100A transfer switch features a heavy-duty contactor and an open transition design for smooth, dependable switching between power sources. The unit operates in coordination with the generator’s controller, which manages all timing, sensing, and transfer functions—reducing complexity and improving overall system efficiency. Adjustable voltage sensing thresholds and timing delays allow for fine-tuned performance based on your specific application.
Built to withstand real-world conditions, the Generac 9935 is housed in a NEMA 3R aluminum enclosure with a durable powder-coated finish, making it suitable for both indoor and outdoor installations. The enclosure protects against rain, ice, and environmental wear, while maintaining a clean, professional appearance. Its compact footprint and integrated fast-mount hanging system simplify installation, saving time for installers and reducing overall setup costs.
Whether you're upgrading an existing standby system or installing a new one, this transfer switch provides dependable, automatic operation backed by Generac’s proven engineering. With manual operation capability during maintenance and a 5-year limited warranty, it offers both flexibility and peace of mind for critical power applications.
Key Features
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100 Amp automatic transfer switch for residential or light commercial use
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120/240V single-phase (1Ø) configuration
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Compatible with Generac Evolution™, Power Zone™ 200 & 410 controllers
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Open transition automatic transfer for reliable power switching
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Generator-controlled timing, sensing, and transfer functions
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Adjustable voltage drop-out and pickup settings for optimized performance
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NEMA 3R aluminum enclosure for indoor/outdoor installation
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Durable powder-coated finish for weather resistance
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Heavy-duty Generac contactor for long service life
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Fast-mount hanging system for quicker installation
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Manual operation capability without power applied
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cETLus listed with 10,000 amp withstand rating
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5-year limited warranty for added peace of mind
