Littelfuse CT45S45, Delay on Make/Delay on Break Timer Series, 24VAC, Off-Delay, On-Delay Time Delay Relay SPST-NO (1 Form A) Fixed, 45 Sec Delay Chassis Mount

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The CT Series combines a delay-on-make and delay-on-break time delay into one unit and may be used to control fan delays in heating and/or cooling equipment. The CT includes bypass circuitry to allow it to operate with cooling anticipators ≥ 3000 ohms. It is designed to operate in 24VAC control circuits. Several CT modules may be combined to provide sequencing of any number of loads and sequencing off of the same loads, such as electric heating elements. Operation (Delay-on-Make/Delay-on-Break) Forced Air Heating or Air Conditioning (as shown): When the thermostat closes, the compressor relay is immediately energized. At the end of a fixed delay-on-make delay (T1), the fan relay is energized. When the thermostat opens, the compressor relay is de-energized and the delay-on-break delay is initiated. On completion of the fixed delay-on- break delay (T2) the fan relay is de-energized. If the thermostat is reclosed during the delay-on-break delay, the delay-on-break delay is reset and the fan relay remains energized. If the thermostat is closed when input voltage is applied, the delay-on-make delay (T1) begins as normal. Reset: Removing input voltage resets the output and time delays. Specifications Time Delay Type Microcontroller Range 1 - 600s Repeat Accuracy ±5% Tolerance (Factory Calibration) ±20% Recycle Time ≤ 300ms Input Voltage 24VACTolerance ±15%AC Line Frequency 50/60 Hz Output Type Solid state Form NO Rating 0.75A steady state, 5A inrush at 55°C Voltage Drop ≅ 1.25V Protection Circuitry Encapsulated Dielectric Breakdown ≥ 2000V rms terminals to mounting surface Insulation Resistance ≥ 100 MΩ Mechanical Mounting Surface mount with one #10 (M5 x 0.8) screw Dimensions H 50.8 mm (2”) W 50.8 mm (2”)D 30.7 mm (1.21”) Termination 0.25 in. (6.35 mm) male quickconnect terminals Environmental Operating/Storage Temperature 40° to 70°C / -40° to 85°C Humidity 95% relative, non-condensing Weight ≅ 2.4 oz (68 g) Thermostat Anticipator Resistor: ≥ 3000 Ω Show more