Intermatic ET1105C 24-Hour Electronic Timer Control 120-277V

Product Overview

The Intermatic ET1105C is a 24-hour, single-circuit electronic timer control designed as an electronic upgrade from basic mechanical time switches. It operates on 120–277 VAC and uses an SPST switching configuration housed in an indoor Type 1 metal enclosure. The timer supports up to 28 total programmed events, to-the-minute scheduling, battery backup, and automatic Daylight Saving Time adjustment.

Key Features & Design

• Functionality: Provides 24-hour ON/OFF scheduling with up to 28 total events, consisting of 14 ON and 14 OFF events. Minimum ON/OFF time is 1 minute, and temporary or permanent manual override is supported.
• Installation context: Designed for indoor lighting control, scheduled ON/OFF operation, and machinery and pump control applications. The unit uses an indoor Type 1 metal enclosure.
• Notable specifications: 120–277 VAC, 50/60 Hz input; 30A; 1 circuit; SPST switching; 6W maximum power consumption; selector-switch voltage selection; terminal wiring; and digital time display.
• Contractor-relevant details: Accepts #14 through #8 AWG wire and includes combination 1/2"–3/4" knockouts. Product dimensions are 7.875" H × 5.125" W × 3.437" D.
• Backup & scheduling: Uses a replaceable AAA alkaline battery for backup and automatically adjusts for Daylight Saving Time.

Performance / Benefits

The ET1105C combines electronic scheduling with flexible 120–277 VAC operation, making it suitable for a range of commercial electrical control applications. Its 28-event capacity and one-minute minimum switching interval provide precise daily scheduling, while battery backup helps preserve timer operation during power loss. Automatic Daylight Saving Time adjustment reduces the need for seasonal manual changes.