{"id":8900,"date":"2026-11-11T15:52:55","date_gmt":"2026-11-11T07:52:55","guid":{"rendered":"https:\/\/www.qishan-sh.com\/?post_type=product&#038;p=8900"},"modified":"2026-11-11T15:52:55","modified_gmt":"2026-11-11T07:52:55","slug":"s-spd","status":"publish","type":"product","link":"https:\/\/www.qishan-sh.com\/en\/product\/s-spd\/","title":{"rendered":"S Series Surge Protector"},"content":{"rendered":"<p>The S Series signal SPD is mainly used to protect field devices such as transmitters, switches, frequency signals, communication equipment, RTDs and thermocouples connected in two-wire or three-wire configurations, as well as control-room equipment such as safety barriers, I\/O, DCS and PLC, from damage caused by lightning surge impulse voltages or switching overvoltages.<\/p>\n<p>Addressing the lightning protection requirements of low-voltage industrial control signals, the S-Pro Series surge protective device was launched after the basic S Series, offering greater functionality and 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