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Serial Surge Protectors

Browse serial surge protectors designed to help protect RS-232, RS-422, and RS-485 communication lines from electrical surges and transient voltage events. These products are used to safeguard serial networks and connected equipment in industrial and infrastructure applications where exposed cabling, electrical noise, or induced surges can affect system reliability.

Ideal for use in harsh industrial environments, remote installations, and anywhere signal reliability is needed.

Need advice on protecting your serial infrastructure? Our team is here to help.

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Showing 6 of 6 Serial Surge Protectors items

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Moxa ISD-1110-T

RS-232 Surge Protector – 4kV Isolation and 7 Data Lines

£79.50 (exc. VAT)

Moxa ISD-1210-T

RS-232 Surge Protector – 20kV Isolation and 4 Data Lines

£195.50 (exc. VAT)

Moxa ISD-1130-T

RS-422/485 Surge Protector – 4kV Isolation and 7 Data Lines

£70.50 (exc. VAT)

Moxa ISD-1230-T

RS-422/485 Surge Protector – 20kV Isolation and 4 Data Lines

£195.50 (exc. VAT)

Sealevel SS-DB25-ROHS

DB25 Female to DB25 Male - Serial Surge Suppressor

Sealevel SS-DB9-ROHS

DB9 Female to DB9 Male - Serial Surge Suppressor

Frequently Asked Questions

Learn More About Serial Surge Protectors

A serial surge protector helps protect a serial communication line and the connected equipment from damaging surge events or transient voltages. It is installed in the signal path to reduce the risk that electrical disturbances on the line will reach sensitive communications hardware.

Surge protection is especially useful when serial cabling runs between buildings, outdoors, alongside other electrical infrastructure, or through environments where induced surges or switching events are more likely. It can also be a sensible precaution in industrial sites where communication reliability is important and equipment replacement would be disruptive.

No. While lightning-induced surges are one reason to use them, serial surge protectors can also help defend against switching transients and other electrical disturbances that may affect communication lines. In practice, they are used wherever unwanted voltage events could threaten the stability or safety of the serial link.

Yes, in many cases the protector should match the serial interface and line characteristics of the application. The correct choice depends on the signalling standard, connector arrangement, installation method, and the way the communication line is being used within the wider system.

A serial surge protector is typically installed at a point where the line enters a cabinet, control panel, building, or device, so that surge energy can be dealt with before it reaches sensitive equipment. The exact location depends on the layout of the installation and the part of the system most at risk.