Delay on Make/Delay on Break Timer Series - Delay on Make/Delay on Break Timer

External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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 on 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.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Storage Temperature (F/C)Time Delay RangeDimensionsStockCompare
CT1S3024 V acNO-40° to 85°C (-40° to 185°F)DOM: 1 s; DOB: 30 s2 H x 2 W in. (50.8 x 50.8 mm)Check
CT1S4524 V acNO-40° to 85°C (-40° to 185°F)DOM: 1 s; DOB: 45 s2 H x 2 W in. (50.8 x 50.8 mm)Check
CT1S824 V acNO-40° to 85°C (-40° to 185°F)DOM: 1 s; DOB: 8 s2 H x 2 W in. (50.8 x 50.8 mm)Check
CT1S9024 V acNO-40° to 85°C (-40° to 185°F)DOM: 1 s; DOB: 90 s2 H x 2 W in. (50.8 x 50.8 mm)Check
CT30S124 V acNO-40° to 85°C (-40° to 185°F)DOM: 30 s; DOB: 1 s2 H x 2 W in. (50.8 x 50.8 mm)Check
CT45S4524 V acNO-40° to 85°C (-40° to 185°F)DOM: 45 s; DOB: 45 s2 H x 2 W in. (50.8 x 50.8 mm)Check
CT5S30024 V acNO-40° to 85°C (-40° to 185°F)DOM: 5 s; DOB: 300 s2 H x 2 W in. (50.8 x 50.8 mm)Check
To request product environmental information, please complete the Product Environmental Information Request Form.