Overview
The Intermatic K1121 is a K1100 Series relay-type photo control switch designed to automatically manage outdoor and commercial lighting circuits based on ambient light levels. With a 105-130VAC input rated at 50/60Hz, the K1121 provides reliable dusk-to-dawn operation for landscape, parking lot, architectural, and general outdoor lighting applications. The adjustable stem mounting design allows flexible installation angles for optimal light sensor positioning.
Key Features
- Relay-type photocontrol with instant ON/OFF switching response
- Adjustable stem mounting for precise light sensor alignment
- 6-inch color-coded lead wires for direct circuit wiring
- Polycarbonate housing rated for outdoor and corrosive environments
- 1/2 IN – 14 NPT threaded connection for standard fixture mounting
- Compact 3″ diameter × 5.75″ height cylindrical design
Technical Specifications
- Input Voltage: 105-130VAC
- Frequency: 50/60Hz
- Power Rating (Tungsten/Incandescent): 1800W
- Ballast Load Rating: 1800VA
- Power Consumption: 3W
- Max Amperage: 15 A (15,000 mA)
- Operating Temperature Range: -40°F to +158°F (-40°C to +70°C)
- Connection Type: 1/2 IN – 14 NPT threaded stem
- Mount Type: Adjustable stem with swivel option
- Material: Polycarbonate
- Lead Length: 6 inches, color-coded
- Weight: 0.66 lbs
- Switch Type: Relay
- Series: K1100 Series
Typical Applications
- Outdoor area and parking lot lighting control
- Architectural and façade lighting automation
- Sign and display lighting circuits
- Landscape and grounds lighting systems
- Street light and roadway lighting circuits
- Commercial HID and incandescent fixture switching
Compatibility & Replacements
Compatible With
- Standard 105-130VAC ballast circuits
- HID (high-intensity discharge) and incandescent fixtures
- Outdoor lighting control systems and panels
- Fixed stem and swivel mount fixture designs
- 1/2 IN NPT threaded mounting provisions
Replaces / Drop-In Replacement For
- Intermatic K1121 (original OEM part)
- K1100 Series photocontrols with equivalent voltage/frequency ratings
Works With
- Standard 120V lighting control wiring and conduit
- Ballast and transformer circuits up to 1800W
- Instant ON/OFF relay switching logic
- Manual dusk/dawn adjustment stem controls
- Color-coded lead wire terminations to standard lighting panels and contactors
