The surge suppressors in the SP100 family are designed to help protect instruments on 4-20mA process loops, AC power lines, and RS-232/422/485 digital networks from harmful surges due to transient signals and lightning. The surge suppressors should help protect up to four signal lines. They are available in pipe-style and DIN-rail mounting configurations and AC or DC powered versions. The devices incorporate multi-stage suppression design and hybrid technology with silicon avalanche technology that is intended to provide sub-nanosecond response and gas arrestor tubes for up to 10kA surge-current capacity.

The pipe-style modules can be used to help protect two-wire, field-mount transmitters, field sensors, and communication devices. These units include common mode and differential mode suppression with RFI/EMI filtering. The DIN-rail mount modules are designed to help protect a variety of telecom and process control equipment. They are packaged in a 0.6-in wide aluminum housing. Grounding is achieved through the integrated DIN-rail-mounting clip or the screw post on top of the module. Quick-disconnect terminal blocks should simplify field installation and permit replacement without disturbing existing wiring.