Description
The Johnson Controls A19AAA-49 is a rugged, single-pole single-throw (SPST) utility thermostat engineered for dependable temperature control across a wide range of commercial and industrial HVAC applications. With an open-on-low (open on temperature rise) switching action and a broad sensing range of -30°F to 100°F, this thermostat is ideally suited for freeze protection, refrigeration monitoring, low-temperature alarm circuits, and outdoor ambient sensing tasks.
The included 6-foot capillary sensing element provides flexible installation options, allowing the sensing bulb to be positioned precisely at the point of measurement while the control body is mounted in a convenient, accessible location. The A19AAA-49 is a trusted solution for OEM equipment builders, mechanical contractors, and building automation professionals who require accurate, repeatable low-temperature switching performance.
Key Features
- SPST (Single-Pole Single-Throw) switching configuration
- Open on low (opens on temperature rise) switching action
- Wide temperature sensing range: -30°F to 100°F (-34°C to 38°C)
- 6-foot capillary for remote sensing flexibility
- Durable construction suitable for commercial and industrial environments
- Ideal for freeze protection, refrigeration, and low-temperature control circuits
Specifications
- Brand: Johnson Controls
- SKU / Model: A19AAA-49
- Switch Type: SPST
- Action: Open Low (Opens on Temperature Rise)
- Temperature Range: -30°F to 100°F (-34°C to 38°C)
- Capillary Length: 6 feet
Common Applications
- Freeze protection control circuits
- Refrigeration and cold storage monitoring
- Outdoor ambient temperature switching
- OEM HVAC and refrigeration equipment
- Low-temperature safety and alarm systems
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