TII Electronics 3251M Signal Circuit Protector

The TII Electronics 3251M Signal Circuit Protector is a one-pair station protector module in the 325 Series Totel Failsafe line, engineered to shield telecommunications and signal circuits from lightning surges, power cross events, and transient overvoltages while preserving reliable signal transmission. It uses TFS Totel Failsafe technology and delivers up to 130 A maximum discharge surge current and a 40 kA lightning impulse current rating, with capacitance under 30 pF, housed in flame-retardant plastic, and mounting compatible with TII 325 Series Station Protector Bases. Commonly installed at network interface devices (NIDs), outside plant installations, utility communications, and industrial telecommunications infrastructure, the 3251M protects a single pair of circuits and can serve as a replacement for failed protectors, with compatible replacements including TII 325-1MT, 326-1L, and 321-1M; MPN 3251M (325-1M). Manufacturer: TII Electronics (Tii Technologies Inc.).