ACData Solutions’ SureLinx 4-20 current loop protectors provide multi-stage capacity protection for 24 and 48 volt 4-20 mA electronics instrumentation.

SureLinx current loop protectors use a multi-stage hybrid circuit to provide a combination of high surge capability and low let-through voltages. Silicon avalanche diodes catch the leading edge of the surge with sub-nanosecond response time. Within microseconds, an impedance coordinated dual-chamber heavy-duty gas tube crowbars the surge to the ground. The protector remains in this state until the surge has safely passed and voltages return to nominal, then automatically restores the loop to normal operations.