Johnson Controls A421ABT-02C

Johnson Controls A421ABT-02C is an Electronic Single Stage Temperature Control designed for precise climate control in 120/240 Vac systems. This compact electronic temperature controller combines SPDT output with a reliable cycle timer, all housed in a UL Type 1, IP20-rated enclosure for safe indoor use.

Designed for versatile HVAC and processing environments, this controller supports a wide operating voltage and a broad temperature sensing range. The integrated 2 m (6'6") temperature sensor delivers accurate readings for steady regulation from -40 F to 212 F, enabling dependable performance across commercial refrigerating units, walk-in coolers, and industrial equipment.

Designed for reliable indoor operation in commercial settings, this unit helps improve energy efficiency with its cycle timer and precise regulation. It supports a wide operating voltage and broad temperature sensing range, making it a versatile choice for smart HVAC retrofits and equipment upgrades.

• 120/240 VAC operation for versatile installations
• SPDT output for reliable on/off control
• UL Type 1 enclosure with IP20 protection
• Cycle timer for precise timing control
• Includes a 2 m (6'6") temperature sensor (-40 F to 212 F)