BOJACK 24V 40VA Thermostat & Doorbell Transformer — UL-Certified, Nest/Ring Compatible

Steady power for your smart home

The BOJACK 24V 40VA transformer is built to keep thermostats and doorbells powered with a reliable 24-volt supply. Rated for 40 VA and UL-certified, it accepts 120 VAC at 60 Hz and delivers a consistent 24 V output, designed to support devices that depend on continuous voltage for smooth operation.

In everyday use, a stable power source can help your smart thermostat respond more predictably to changes in temperature and occupancy, while doorbell systems remain ready for notifications and video requests. This transformer is crafted to work across several popular ecosystems, including major thermostat brands and doorbell models, enabling a flexible, single-supply solution for mixed-device setups.

Key benefits

• Powers thermostats and doorbells: helps replace underpowered transformers and maintain steady operation.
• Technical specs at a glance: Input 120 VAC, 60 Hz; Output 24 V / 40 VA.
• UL-certified for reliable performance and safety compliance.

Wide compatibility

• Supports Nest, Ecobee, Sensi, and Honeywell thermostats.
• Compatible with Ring Video Doorbell series, Nest Hello, and all versions of Ring Doorbell.
• Suitable for other devices that require constant 24V power for operation.

Easy installation and use

Designed with practical installation in mind, this transformer mounts with screw-down clamps to a standard electrical box, making it straightforward to secure in place and connect to your existing wiring.

Whether you’re upgrading an aging transformer or supplementing a mixed-brand setup, BOJACK offers a robust, flexible power supply option that helps keep your smart home components powered when they need it most.