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Which ETC Model do I need?

The RANCO ETC is a microprocessor-based family of temperature controls designed to provide on/off control for commercial heating, cooling, air conditioning and refrigeration applications. With its wide temperature range, one and two stage capability, selectable heating/cooling modes and multi-voltage input, the ETC is one of the most versatile temperature controls available.

There are 10 different models of Ranco ETC Controllers to choose from. The following table summarizes the primary features that are different between the the available models. If you are unsure which model will work for you or have any additional questions please feel to Contact Us.

Model Number
Number of Stages
Input Voltage
0 to 10 Volt Output
(1K Impedance)
ETC-111000-000 One NEMA 1 120/208/240 VAC No
ETC-111100-000 Yes
ETC-112000-000 24 VAC No
ETC-112100-000 Yes
ETC-141000-000 NEMA 4 120/208/240 VAC No
ETC-211000-000 Two NEMA 1 120/208/240 VAC No
ETC-211100-000 Yes
ETC-212000-000 24 VAC No
ETC-212100-000 Yes
ETC-241000-000 NEMA 4 120/208/240 VAC No

Relay Output Ratings - NO(NC):

One Stage (controlling heating or cooling) and Two Stage (controlling both heating and colling at the same time) have different output power limits. If the relays of the Two stage models don't satisfy your needs, you may need to use either an external relay, or two Ranco ETC Controllers since the One Stage controllers can control higher amperage. All relays are capable of switching 0 to 240 volts.

  One Stage Two Stage
  120V 208/240V 120V 208/240V
Full load amps 16 (5.8) A 8 (2.9) A 9.8 (5.8) A 4.0 (2.9) A
Load rotor amps 96 (34.8) A 48 (17.4) A 58.8 (34.8) A 29.4 (17.4) A
Resistive amps 15 (5.8) A 8 (2.9) A 9.8 (5.8) A 4.9 (2.9) A
Horsepower 1 (1/4) HP 1 (1/4) HP 1/2 (1/4) HP 1/2 (1/4) HP
Pilot duty 125VA 125VA    

Specification common to all models.

  • Temperature Setpoint Range: -30° to 220°F
  • Differential range: 1° to 30°F
  • Sensor: Thermistor, 2" long x 1/4"dia with 8' cable (included)
  • Control Ambient Temperatures
    • Operating: -20° to 140°
    • Storage: -40° to 176°
  • Ambient humidity: 0 to 95% RH, non-condensing
  • Dimensions: NEMA 1 - 6.52" high x 2.7" wide x 2.48" deep; NEMA 2 - 7.84" high x 2.7" wide x 2.48" deep
  • Agency Approvals: UL listed, file E94419, Guide XAPX, CSA certified, file LR68340, class 4813 02
  • Switch Action: SPDT

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