HX-E1000: Gigabit Network Surge Protector

What is the HX-E1000 protecting?

This unit guards low-voltage data pairs. The specification gives a rated voltage of 5 V with a maximum continuous working voltage of 6 V — the highest steady voltage the component is designed to sit on without conducting.

It is rated for 10/100/1000 Mbps links, so it can be fitted in series with the data pair without dropping the link to a lower speed. Its housing is 82×25×25 mm, which is the number that decides whether it goes on a wall next to the camera, inside a cabinet, or on a DIN rail.

Every figure on this page matches the specification table above. For a tender, ask for the current datasheet before quoting.

What do In and Imax mean on this model?

Nominal discharge current (In) is 2.5 kA and maximum discharge current (Imax) is 5 kA. The two numbers are not interchangeable: In is the surge current the unit is expected to survive repeatedly over its service life, while Imax is the single-shot ceiling it can take once.

Both are quoted against the standard surge test waveform, an 8/20 µs current impulse. A real lightning strike on an outdoor camera line is not that waveform, which is why surge protection is specified by class and by installation point rather than by a single kA figure.

A protector is a sacrificial component: after a large event it may need replacing even though the equipment behind it survived. That is the design intent — a cheap replaceable part takes the hit instead of the camera or the switch.

Where does it go in the installation?

At the boundary. The protector belongs at the point where the line enters the building or leaves it — before the protected equipment, on the side facing the surge. Fitting it at the far end of a long run, next to the camera, leaves the whole run exposed upstream.

The earth connection is the part that actually does the work. A surge protector with a long, thin or shared earth lead raises the clamping voltage at the equipment by the voltage drop along that lead, and the protection is only as good as that path. Keep the earth lead short and direct, and bond it to the same earth as the equipment it protects.

The housing measures 82×25×25 mm, so plan the enclosure or rail space before ordering.

Which model in the range fits my site?

Start from the rail being protected — data pair, PoE line or AC supply — then from the exposed length and the exposure of the site. The table compares the family on the four rows that decide the choice.

FAQ