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Johnson Controls A350A/B Series Electronic On/Off Temperature Control

Electronic On/Off Temperature Control
A350A/B Series

The A350A/B Series are On/Off temperature controls with a SPDT relay output and LED indication. These controls are used in conjunction with the A99B Series (PTC silicon) Temperature Sensors. Two basic models cover a temperature range of -30 to 250°F with an adjustable differential of 1 to 30F°. A350A controls incorporate Fahrenheit scales; the A350B models have Celsius scales. The S350 Stage, D350 Display, and Y350R Power Modules can be used with the A350A/B.



• field selectable heat/cool mode
• adjustable setpoint and differential
• surface or DIN rail mounting
• LED indication of relay status
• 5-pin connectors eliminate wiring between modules



Select a link under the "item" tab below to order.

Cat #OffsetRange AdjusterAdj. Diff.
A350AA-1C1 to 30F°-30 to 130°F1 to 30F°
A350AA-2C1 to 30F°90 to 250°F1 to 30F°
A350AA-3C¹1 to 30F°-30 to 130°F1 to 30F°
A350BA-1C0.5 to 17C°-35 to 55°C0.5 to 17C°
A350BA-2C0.5 to 17C°30 to 121°C0.5 to 17C°
Product: A350AA
On/Off Temperature Control with Fahrenheit scale
On/Off Temperature Control with Celsius scale
Temperature Range: -30 to 130°F (-35 to 55°C);
90 to 250°F (30 to 121°C)
Differential Range: 1 to 30F° (0.5 to 17C°)
Supply Voltage 1: Transformer 20 to 30 VAC, 50/60 Hz, Class 2
Y350R 120/240 VAC, 50/60 Hz
Relays: SPDT enclosed relays, contacts rated at 10 amp,
non-inductive (resistive), 1/2 hp 120/240 VAC
Power Consumption: 1.4 VA Maximum
Ambient Temperature: Operating -30 to 150°F (-34 to 66°C)
Shipping -40 to 185°F (-40 to 85°C)
Humidity: 0 to 95% RH non-condensing
Case and Cover Material: NEMA 1, high-impact thermoplastic

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