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JOHNSON CONTROLS Line Volt Mechanical Tstat: 25° to 225°F, Steel, Fixed, 3.5°F - Indoor Single-Stage Controls
JOHNSON CONTROLSIndoor Single-Stage Controls

JOHNSON CONTROLS Line Volt Mechanical Tstat: 25° to 225°F, Steel, Fixed, 3.5°F

The JOHNSON CONTROLS A19AAF-12C is an indoor single-stage line-voltage mechanical thermostat with a fixed 3.5°F differential and a temperature control range of 25° to 225°F. It features a SPDT switch action…

SKU 3G-OTH-68169

Brand
JOHNSON CONTROLS
Item
Line Volt Mechanical Tstat: 25° to 225°F, Steel, Fixed, 3.5°F
Category
Indoor Single-Stage Controls
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Technical Specifications

JOHNSON CONTROLS
Manufacturer Part Number
A19AAF-12C
Type
Steel, Fixed, 3.5°F
AC Volt
24 to 277V
Voltage
24 to 277V AC
Differential Type
Fixed
Enclosure Material
Steel
Switch Type/Action
SPDT, Open/Close on Rise
Temperature Differential
3.5°F
Temperature Control Range
25° to 225°F
Capillary Length/Bulb Diameter
10 ft Capillary, 3 in x 3/8 in Bulb
View Full Spec Sheet

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JOHNSON CONTROLS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The JOHNSON CONTROLS A19AAF-12C is an indoor single-stage line-voltage mechanical thermostat with a fixed 3.5°F differential and a temperature control range of 25° to 225°F. It features a SPDT switch action (open/close on rise), operates on 24 to 277V AC, and includes a 10 ft capillary with a 3 in x 3/8 in bulb in a steel enclosure.

Frequently Asked Questions

What is the JOHNSON CONTROLS A19AAF-12C thermostat used for?

The JOHNSON CONTROLS A19AAF-12C is a line-voltage mechanical thermostat used for indoor single-stage temperature control in HVAC and industrial processes. It is suitable for applications requiring a fixed 3.5°F differential and a temperature range of 25° to 225°F, such as duct or immersion sensing.

What are the specifications of the JOHNSON CONTROLS A19AAF-12C?

The A19AAF-12C has a SPDT switch action (open/close on rise), a temperature control range of 25° to 225°F, a fixed 3.5°F differential, and operates on 24 to 277V AC. It includes a 10 ft capillary with a 3 in x 3/8 in bulb and a steel enclosure.

Where to buy the JOHNSON CONTROLS A19AAF-12C worldwide?

3G Electric supplies the JOHNSON CONTROLS A19AAF-12C worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this mechanical thermostat.

How to install the JOHNSON CONTROLS A19AAF-12C thermostat?

Mount the steel enclosure securely in a dry indoor location. Route the 10 ft capillary and bulb to the sensing point, ensuring the bulb is fully immersed or in good thermal contact. Connect the SPDT switch per the wiring diagram for 24 to 277V AC. Verify open/close on rise action before commissioning.

Used in

Common applications for JOHNSON CONTROLS
Industrial refrigeration — Johnson Controls P170SA-1C dual pressure control for compressor protection in ammonia or halocarbon systems
Chiller plant automation — Johnson Controls VA7810-HGA-2 electric globe valve actuator for modulating chilled water flow in VG7000 series valves
Pneumatic HVAC retrofit — Johnson Controls T-4002-302 conversion kit for upgrading existing Robertshaw thermostats in commercial buildings
Cooling tower water management — Johnson Controls V-4332-1007 pneumatically actuated diaphragm valve for 3-way diverting of water flow
Boiler fuel oil pressure monitoring — Johnson Controls P545NCB-25C electronic lube oil pressure control with alarm for burner management systems
Process pressure sensing — Johnson Controls P599AAPS105C pressure transmitter with IP67 rating for washdown zones in food and beverage plants

JOHNSON CONTROLS Products

3G Electric supplies JOHNSON CONTROLS indoor single-stage controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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JOHNSON CONTROLS Line Volt Mechanical Tstat: Heat Only, Steel, 30° to 110°F, 1.5°F, 24 to 277V AC (MPN A19BAF-1C). Key specifications — attr400419: 24 to 277V AC; attr400424: SPDT, Open/Close on Rise; attr400415: 30° to 110°F; attr400417: 1.5°F; attr400418: Hydraulic Air Coil; attr400408: Heat Only; attr408361: JOHNSON CONTROLS; attr400410: Steel.
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JOHNSON CONTROLS Line Volt Mechanical Tstat: 30° to 50°F, Steel, Fixed, 2.5°F, 24 to 277V AC Volt (MPN A19AAD-5C). Key specifications — Switch Type/Action: SPST, Close on Rise; Temperature Control Range: 30° to 50°F; Temperature Differential: 2.5°F; Voltage: 24 to 277V AC; Capillary Length/Bulb Diameter: 6 ft Capillary, 2-5/8 in x 3/8 in Bulb; Brand: JOHNSON CONTROLS; Differential Type: Fixed; Enclosure Material: Steel.