Description
The Johnson Controls A421AEC-01 is a versatile, heavy-duty electronic temperature controller engineered for demanding HVAC and refrigeration applications. Designed to handle a wide operating range and rugged installation environments, this controller delivers reliable, precise temperature management in a compact, field-ready package.
Overview
The A421AEC-01 operates on 120/240 VAC power and covers a broad temperature control range of -40°F to 212°F (-40°C to 100°C), making it suitable for everything from freezer and cooler applications to heating and process control. Its front-panel LCD provides clear, at-a-glance status and setpoint readout, while the NEMA 4X-rated enclosure ensures protection against dust, dirt, and water ingress — ideal for wash-down or outdoor environments.
Key Features
- Electronic temperature control with front-panel LCD display
- Wide temperature control range: -40°F to 212°F (-40°C to 100°C)
- Dual voltage input: 120/240 VAC
- NEMA 4X enclosure for protection against dust, moisture, and corrosion
- Flexible mounting: DIN rail or surface mount
- Includes NTC temperature sensor with 9-inch leads for quick installation
Specifications
- SKU: A421AEC-01
- Brand: Johnson Controls
- Voltage: 120/240 VAC
- Temperature Control Range: -40°F to 212°F (-40°C to 100°C)
- Display: Front Panel LCD
- Enclosure Rating: NEMA 4X
- Mounting: DIN Rail or Surface Mount
- Sensor: Included NTC sensor with 9″ leads
Applications
- Commercial refrigeration and freezer control
- HVAC heating and cooling system management
- Industrial process temperature control
- Food service and cold storage equipment
- Outdoor or wash-down environments requiring NEMA 4X protection
Why Choose the Johnson Controls A421AEC-01?
With its combination of wide temperature range, dual-voltage compatibility, intuitive LCD interface, and NEMA 4X-rated housing, the A421AEC-01 is a go-to solution for contractors and facility managers who need a dependable, easy-to-install temperature controller. The included sensor with 9-inch leads means you can get up and running quickly without additional accessories.
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