K4121C INTERMATIC Stem Mount Thermal Photocontrol
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Thermal dusk-to-dawn photocontrol from Intermatic, model K4121C. Cadmium Sulfide photocell with mechanical bimetal switch mounts directly onto standard outdoor light fixtures and electrical boxes with a 1/2"-14 NPSM threaded stem or 7/8" knock-out. A built-in sensor delay (30–90 sec) prevents unwanted OFF switching. Compatible with HID, fluorescent, and incandescent lamp types.
Available in stock — ships within 24 hours after payment.
Product overview
| Model number | K4121C |
| UPC | 078275002012 |
| Brand | Intermatic |
| Product type | Thermal photocontrol — dusk-to-dawn |
| Mounting style | Stem mount |
| Input voltage | 120 V AC, 50/60 Hz |
| Switch type | SPST — mechanical bimetal |
| Photocell type | Cadmium Sulfide |
| Sensor time delay | 30 to 90 seconds |
| Activation ON | 1 to 5 fc |
| Activation OFF | 3 to 15 fc |
| Fail mode | ON |
| Compatible lamp types | HID, Fluorescent, Incandescent |
| Incandescent / tungsten load | 15 A / 1,800 W |
| Magnetic ballast load | 8.3 A / 1,000 VA |
| Stem thread | 1/2"-14 NPSM |
| Wire leads | #18 AWG, 9" (228.6 mm) |
| Housing material | Polycarbonate — gray |
| Dimensions (H×W×D) | 76.2 × 39.7 × 39.7 mm (3" × 1.563" × 1.563") |
| Operating temperature | -40 °C to +70 °C |
| Expected lifetime | 5 years / 3,650 operations |
| Certifications | cULus (UL 773), cCSAus, Title 20, Green Energy |
| Manufacturer warranty | 2-year limited (Intermatic) |
| Condition | New in original packaging (OVP) |
Applications
- Dusk-to-dawn ON/OFF control of outdoor street, area, and security lighting
- Standard outdoor light fixtures and electrical boxes with 1/2"-14 NPSM thread or 7/8" knock-out
- HID, fluorescent, and incandescent outdoor luminaires
- Commercial and residential outdoor lighting automation
Shipping
- Ships within 24 hours after payment
- Secure packaging for safe delivery
- Free delivery within Germany
Warranty & compliance
- 12-month warranty included
- Product is fully compliant with EU industry standards
- VAT invoice included with every order
(GPSR (EU) 2023/988): Contact us at info@liquisto.com for Manufacturer/EU Responsible Party product safety contact details.