Johnson Controls A19AAB-10C High Range Remote Bulb Temperature Control SPST NEMA 1 200-550F

The Johnson Controls A19AAB-10C is a high-range, remote bulb temperature control from the Penn A19 Series, designed for industrial oven and high-temperature heating applications. It delivers reliable single-stage switching across a broad operating range of 200°F to 550°F (93°C to 288°C) with a fixed differential of 10°F (5.6°C), making it well-suited for precise thermal management in demanding environments.

Key Features:

• Switch Action: SPST (Single-Pole, Single-Throw), Open High — contacts open on temperature rise
• Temperature Range: 200°F to 550°F (93°C to 288°C)
• Fixed Differential: 10°F (5.6°C)
• Sensing Bulb: 3/16" diameter x 6" length, copper construction
• Capillary Length: 8 feet copper capillary tube
• Enclosure Rating: NEMA 1 (general-purpose indoor enclosure)
• Voltage: 24VAC to 277VAC
• Reset Type: Automatic
• Liquid-filled sensing element for accurate and responsive temperature detection
• Convertible range adjuster included

The A19 Series uses a liquid-filled sensing element and capillary to provide accurate, responsive temperature detection without requiring external power for the sensing function. The unit features an exposed set-point dial with a visible scale for easy field adjustment. It is designed for open high applications, where the circuit opens as the temperature exceeds the set point, providing an inherently safe fail-state for heating control.

Closed tank fittings and bulb wells are available separately for immersion applications. For critical processes requiring both high and low limit protection, a dedicated backup control with alarm contacts is recommended in addition to this unit.