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Reliance Controls P4521 is a thermal twist-lock photocontrol designed for photoelectric control of lighting circuits. The P4521 is rated for 5 A at 120 V and uses a standard twist-lock mounting compatible with common photocontrol receptacles. It provides automatic dusk-to-dawn switching for outdoor and street lighting through thermal sensing in a compact gray housing suitable for retrofit or new installations.
Thermal twist-lock photocontrol; 5 A at 120 V; standard twist-lock mounting
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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