Transtector Systems Offers SXRR Series Surge Devices

Transtector Systems Inc. (Hayden Lake, ID) offered its SXRR Series of solid-state, silicon surge-suppression devices that can be installed as a line-to-line or line-to-ground device, and are suitable for railway signaling applications. The SXRR Series provides continuous protection in the event that railway circuits become unbalanced, as a result of a surge strike. Featuring a response time that is less than 5 nsec, the SXRR Series provides protection against surges of up to 20 kA (8 µsec/20 µsec).

The SXRR has a breakdown voltage threshold of approximately 75 V at 5 mA, and is tested to both the 8 µsec/20 µsec and 10 µsec/100 µsec waveforms. The unit is equipped with a clear enclosure that darkens in the event of device failure. It is intended for installation on the entrance board, as close as practicable to where the outside conductors enter the enclosure. The SXRR suppressor weighs around 0.05 kg and is mounted across ¼ in (0.6 cm)-sized studs on 2.38 in (6 cm) center-to-center spacing. Housed within a clear polycarbonate module rated to UL94V-V0, the unit operates over the temperature range of -40 °C to +75 °C.