Technical Guides

Industrial Instrumentation Selection Guide Selecting a 4-20mA surge protector is not only a question of surge current. The signal SPD must match the loop voltage, two-wire or four-wire circuit, transmitter…

Industrial Signal Protection · PLC I/O · OEM Selection How to Select a 24V Signal Surge Protector A 24V marking alone is not enough to select a surge protector for…

RJ45 Selection Guide · Ethernet · PoE · OEM Orders Select the RJ45 surge protector by the network—not by the connector alone Two surge protectors can both use RJ45 sockets…

Engineering Selection Guide A PoE surge protector is not selected by the RJ45 connector alone. For an outdoor CCTV or network project, the protector must match the installation position, Ethernet…

Quick Answer Does a sensor line need surge protection? A sensor line needs a surge-risk check when it runs outdoors, between buildings or over a long distance. These cable routes…

Outdoor SPD Buyer Guide This outdoor SPD IP rating guide explains when an IP20 DIN-rail surge protective device can be installed inside an IP65 enclosure, when a separate outdoor surge…

Industrial Automation Engineering Guide A reliable factory automation surge protection plan must protect every conductive path into the control system—not only the incoming AC supply. This industrial automation surge protection…

BESS DC-Side Engineering Guide Selecting a BESS DC SPD is not the same as selecting a solar PV SPD. The battery circuit can present different fault-current, grounding and end-of-life conditions.…

SPD Engineering, Site Inspection and OEM Selection Guide A low earth-resistance reading is helpful, but it does not by itself prove that an SPD has an effective surge-current path. Engineers…

SPD Installation Guide for Panel Builders SPD cable length directly affects the protection delivered inside a completed distribution board. A surge protective device may have a low declared Up, but…