Johnson Controls A19BAG-1 Temperature Control

The Johnson Controls A19BAG-1 is a professional-grade, mechanical line voltage thermostat engineered specifically for the on/off control of portable space heaters. Built with a NEMA 1 enclosure, this unit features a single-pole, single-throw (SPST) switch action that opens on temperature rise, providing reliable automatic reset functionality for temporary heating installations in commercial or agricultural environments. The 35 to 95 degree F setpoint range is easily managed via an external knob range adjuster with a visible scale, including a dedicated "No Heat" position for manual shutdown without cutting main power. For rapid thermal response, the A19BAG-1 utilizes an exposed helical sensing bulb, maintaining a precise 3 degree F fixed differential to prevent frequent equipment cycling. Installation is streamlined for the field with an integrated 6' extension cord with piggyback style plug and a beaded chain mount, allowing for immediate deployment and flexible positioning in high-traffic work zones.

• Plug-and-Play Integration: The 6-foot thermostat extension cord and series plug allow for direct 120Vac heater connection without hardwiring.
• Superior Response: The coiled sensing bulb (helical element) is dust-protected and provides high-speed temperature sensing compared to standard bimetal controls.
• Robust Electrical Rating: Rated for a 15 Amp full load and 90 Amp locked rotor at 120V, making it compatible with most heavy-duty portable heaters.
• Flexible Mounting: Includes a chain hanger and snap plugs for easy suspension in greenhouses, warehouses, or construction sites.

How do I connect my heater to the A19BAG-1?
This control features a piggyback style plug; simply plug the thermostat into a grounded 120V outlet and then plug your heater?s 3-prong cord directly into the back of the thermostat?s plug.

Can this be used for cooling applications?
No, the A19BAG-1 is an Open High control (contacts open on temperature rise), making it strictly for heating-only applications where the heater needs to turn off once the setpoint is reached.

What is the maximum ambient temperature for the sensing element?
While the setpoint range goes up to 95?F, the maximum bulb temperature is rated for 140?F (60?C) to prevent damage to the sensing element during storage or high-heat cycles.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.