Description
Johnson Controls A421ABC-06 Electronic Temperature Control Overview
The Johnson Controls A421ABC-06 is a versatile, single-stage electronic temperature controller engineered for a wide range of HVAC and refrigeration applications. With a broad operating range of -40°F to 212°F and dual-voltage compatibility at 120/240 VAC, this controller delivers reliable performance in demanding commercial and industrial environments.
Key Features
- Wide temperature control range: -40°F to 212°F (-40°C to 100°C)
- Dual voltage operation: 120/240 VAC for flexible installation
- Front panel LCD display for easy setpoint viewing and adjustment
- NEMA 1 enclosure for indoor protection against dust and light debris
- DIN rail or surface mount options for versatile panel or wall installation
- Includes NTC temperature sensor with 19.5-foot cable and 2-inch probe for remote sensing
- Single-stage output for heating or cooling control
- Compact, user-friendly design with intuitive front-panel controls
Included in the Box
- A421ABC-06 electronic temperature controller
- NTC temperature sensor with 19.5-foot (approx. 6 m) cable
- 2-inch immersion/air probe
Mounting & Installation
The A421ABC-06 supports both DIN rail and surface mounting, making it easy to integrate into existing control panels or mount directly to a wall or enclosure. The NEMA 1 rated enclosure is suitable for indoor installations where protection from dust and incidental contact is required.
Ideal Applications
- Refrigeration unit control
- Heating and cooling equipment staging
- Walk-in cooler and freezer temperature management
- Commercial HVAC process control
- Industrial temperature monitoring and switching
Why Choose the Johnson Controls A421ABC-06?
Johnson Controls is a globally trusted name in building controls and HVAC solutions. The A421ABC-06 combines a wide sensing range, dual-voltage flexibility, and a clear LCD interface in a rugged NEMA 1 package — giving technicians and facility managers a dependable, easy-to-configure solution for virtually any temperature control challenge.
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