the 21 series flash transfer relays are an industry standard for durability and longevity.
With a proven industry record of reliability, the 21 series flash transfer relays are an excellent choice for durability and longevity. Their tough design allows for “setting and forgetting”, simply plug in and look forward to years of service! Recent changes in lighting techniques from incandescent to LED have prompted us to respond with a redesigned relay better suited for the low currents of LED lighting, but equally usable with tungsten lamps
