Intermatic ET1105C Timer

The Intermatic ET1105C is a professional-grade 24-hour electronic timer designed for heavy-duty load control in commercial and industrial HVACR applications. This SPST digital time switch features a multi-volt operation, allowing for seamless integration into 120V or 277V AC systems without the need for additional transformers. Built for reliability, it supports up to 14 ON/OFF events per day with to-the-minute accuracy, ensuring optimal energy efficiency for machinery, pumps, and indoor lighting. The unit is housed in a rugged NEMA 1 steel enclosure and includes a non-volatile EEPROM memory that preserves custom programming indefinitely during power interruptions. A built-in AAA battery provides backup for the clock time while the 30-amp resistive rating makes it a staple for contractors looking to upgrade from standard mechanical timers. With automatic Daylight Saving Time (DST) adjustment and manual override capabilities, this Intermatic 120/277V timer provides a robust, low-maintenance solution for precise scheduled operation.

• Universal Voltage Compatibility: The integrated selector switch simplifies installation by supporting 120V to 277V AC power inputs.
• High Load Capacity: Rated for 30A resistive/inductive and up to 2 HP motor loads, suitable for demanding HVAC and pump equipment.
• Indefinite Memory Retention: Uses non-volatile EEPROM to store schedules, eliminating the need to re-program after extended outages.
• Streamlined Maintenance: Automatic DST updates and to-the-minute programming reduce service calls and manual adjustments.
• Industrial Durability: Lockable metal enclosure prevents unauthorized tampering while protecting internal circuitry from debris.

How many scheduled events can I program?
The ET1105C allows for a maximum of 28 events total, representing 14 ON and 14 OFF cycles per day.

Will I lose my schedule if the battery dies?
No. The timing schedule is stored in non-volatile memory and is retained indefinitely. The AAA battery only maintains the current time and date during a power loss.

Can this timer handle high-voltage lighting ballasts?
Yes, it is rated for up to 20A at 120-277V AC specifically for ballast applications, making it ideal for large-scale lighting control.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.