Allied Air CT1S45 Time Delay Relay 24V 0.75A 1-45 Sec

Product Description

The ALLIED AIR CT1S45 is a solid-state time delay relay designed for HVAC control circuits operating at 24 volts AC, 50/60 Hz. It supports both Delay-On-Make and Delay-On-Break timing functions in a single encapsulated unit, with an adjustable timing range of 1 to 45 seconds. The microcontroller-based design eliminates moving parts, reducing the risk of arcing and mechanical wear over time. The fully encapsulated housing protects internal components against shock, vibration, and humidity. Licensed HVAC technicians and controls specialists install this relay as part of sequencing and load management strategies in heating and cooling systems.

The CT1S45 is suited for residential and light commercial HVAC applications where precise timing control is required during system startup or shutdown sequences. It supports interconnection with other CT-series modules, allowing multiple relays to be combined for sequencing multiple loads on or off in a defined order. This makes it practical for staged heating systems, multi-zone cooling setups, and any application where load staging improves system efficiency and reduces electrical stress at startup.

Key Features

• Delay-On-Make and Delay-On-Break functions combined in one unit
• Adjustable timing range of 1 to 45 seconds
• Fully solid-state and encapsulated construction with no moving parts
• Encapsulated housing resists shock, vibration, and humidity
• Interconnects with other CT-series modules for load sequencing
• UL, CSA, and CE listed

Compatibility

Designed as an OEM-style replacement time delay relay for 24-volt AC HVAC control circuits. Compatible with other CT-series modules for expanded sequencing configurations.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified controls specialist. De-energize the control circuit and confirm power is off before removing or installing the relay. The surface-mount configuration should be secured to a stable panel or DIN rail surface per manufacturer guidance. Follow all applicable local codes and the National Electrical Code when wiring low-voltage control circuits.

Technical Specifications

• Contact Voltage Rating: 24 volts AC, 50/60 Hz
• Contact Current Rating: 0.75 amps
• Timing Range: 1 to 45 seconds
• Timing Mode: Delay-On-Make / Delay-On-Break
• Operating Type: AC Operated, Microcontroller
• Mounting: Surface Mount
• Certifications: UL, CSA, CE

Standard Information

• Brand: ALLIED AIR
• Manufacturer Part Number: CT1S45