Industrial sn442b Speed Relay SW-2D Timing Relay

Shin Sung SW-2D Speed Relay SN442B is a DC-24V speed-monitoring relay from Shin Sung Industrial Electronics Co., Ltd. (SSC) designed for motor control and industrial automation, delivering precise speed detection that triggers relay actuation to help prevent motor faults and maintain safe operation. The unit is compact and industrial‑grade, weighing about 290 g, and it uses a DC 24V power supply to ensure stable, reliable performance in demanding environments. Cataloged as an alternate model to SN442A, the SN442B shares the same core speed-detection functionality in the SW-2D family, providing a streamlined solution for monitoring shaft speed and coordinating protective or control actions in automated systems. This combination of compact form, dependable DC supply, and verified speed-detection capabilities makes it suitable for integration into control circuits where accurate motor-speed sensing and timely relay responses are essential.