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JOHNSON CONTROLS Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital - Single-Stage Electronic Temperature Controls
JOHNSON CONTROLSSingle-Stage Electronic Temperature Controls

JOHNSON CONTROLS Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital

The JOHNSON CONTROLS A421AEC-02C is a single-stage electronic temperature control for cooling applications. It operates with a 120V AC input voltage and is compatible with the A99 series. This digital control…

SKU 3G-OTH-68817

Also listed as: A421AEC02C · A421AEC 02C

Brand
JOHNSON CONTROLS
Item
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital
Category
Single-Stage Electronic Temperature Controls
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

JOHNSON CONTROLS
Manufacturer Part Number
A421AEC-02C
Type
Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99
Application
Cooling Control
Product Type
Temperature Control
Input Voltage
120V AC
Compatible with Series
A99
Variable Output Voltage
No

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

Product Description

The JOHNSON CONTROLS A421AEC-02C is a single-stage electronic temperature control for cooling applications. It operates with a 120V AC input voltage and is compatible with the A99 series. This digital control features a SPDT output and a temperature range of -40°F to 212°F, with a NEMA 4X enclosure.

Frequently Asked Questions

What is the JOHNSON CONTROLS A421AEC-02C temperature control used for?

The JOHNSON CONTROLS A421AEC-02C is a single-stage electronic temperature control for cooling applications. It is used in industrial HVAC and refrigeration systems to maintain setpoint temperatures between -40°F and 212°F, with a SPDT output and NEMA 4X enclosure for harsh environments.

What are the specifications of the JOHNSON CONTROLS A421AEC-02C?

The JOHNSON CONTROLS A421AEC-02C is a digital temperature control with 120V AC input voltage, SPDT output, and a temperature range of -40°F to 212°F. It features a NEMA 4X enclosure and is compatible with the A99 series. Variable output voltage is not supported.

Where to buy the JOHNSON CONTROLS A421AEC-02C worldwide?

3G Electric supplies the JOHNSON CONTROLS A421AEC-02C temperature control to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this control to your facility, regardless of location.

How to install the JOHNSON CONTROLS A421AEC-02C temperature control?

Install the JOHNSON CONTROLS A421AEC-02C by mounting the NEMA 4X enclosure in a dry location, wiring the 120V AC input and SPDT output per the wiring diagram, and setting the cooling setpoint within the -40°F to 212°F range. Always follow local electrical codes and the manufacturer's manual.

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 single-stage electronic temperature controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AEC-01C)
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AEC-01C)
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 24V AC, A99 (MPN A421GBF-02C)
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 24V AC, A99 (MPN A421GBF-02C)
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AED-01C)
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AED-01C)
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, 24V AC, A99 (MPN A421GEF-02C)
JOHNSON CONTROLS
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, 24V AC, A99 (MPN A421GEF-02C)
Temperature Control: Single Stages, Cool Only, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABT-02C)
JOHNSON CONTROLS
Temperature Control: Single Stages, Cool Only, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABT-02C)
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABD-02C)
JOHNSON CONTROLS
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABD-02C)

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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABC-02C)
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Temperature Control: Single Stages, Heat or Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABC-02)
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABC-06C)
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AET-01C)
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