UL 1449 Surge Protector 20KA LED SPD Lightning Surge Suppressor for 120-277V Outdoor Street Light

Yes, our 10KA LED SPD lightning surge suppressor supports universal input voltage 277V, perfectly matched with standard 277V LED drivers for outdoor street light, parking lot light and commercial area lighting. It fully complies with UL 1449 safety standards and passes strict North American certification tests, suitable for municipal outdoor lighting projects.

This lightning surge suppressor features nominal discharge current 10kA and maximum surge current up to 20kA (8/20μs waveform), providing full L-N, L-G, N-G three-channel surge protection. Its response time is ≤20nS, which can rapidly clamp transient voltage spikes to protect outdoor street light LED drivers from lightning damage.

It cannot be exposed outdoors alone; the enclosure reaches IP67 waterproof grade and must be mounted inside the sealed housing of outdoor street light luminaires. It supports a wide working temperature range of -40℃ ~ +70℃, stable for all kinds of extreme outdoor weather. The sealed encapsulated structure effectively avoids spark risks under abnormal failure status.

Yes, SPD MUST be grounded, and it MUST have good earthing. The SPD works by diverting surge current quickly to the ground. Without PE wire, or with poor / loose / thin grounding connection, surge current cannot discharge effectively. The result: the driver and luminaire will still be damaged during lightning. In short: No grounding = SPD useless Poor grounding = SPD almost useless Good grounding = real surge protection works