Class III / Type 3
Two-Port Surge Filter

Prosurge’s surge filter is used to protect single/three phase electrical distribution systems, especially to protect sensitive electronics

against the harmful effects of transient surges. Surge protective device especially for low-voltage power supply system surge protection

at the boundaries from lightning protection zone 2-3 and higher.

It’s found that electronic equipment is sensitive to both the absolute magnitude of the impulse voltage and its rise rate.

The radical changes in dv/dt and di/dt, rather than the peak voltage, is the major source of electronic circuit damages.

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Prosurge’s surge filter

Prosurge’s surge filter is designed as a 3-stage protection system which consists of primary protection & secondary protection with

a well-designed LC filter in series. The LC filter is used to slow down the inherently fast rise rate of voltage and current.

The primary protection module is used to divert the strong lightning/surge current, while the secondary protection module & LC filter

will limit the let-through voltage to a very low level.

The surge filter should be installed in series with the supply powering the equipment.

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Surge filter Models

DSF25/320-25A 3P/C-S

Surge protective device especially for low-voltage power supply system surge protection at the boundaries from lightning protection zone 2-3 and higher.

✔ Class III (class D) surge protector in accordance

with IEC61643-11 and UL1449-4th

✔ Series type SPD/surge power filter, rated load current 25A

✔ Single phase surge protection

✔ High energy MOV (Metal Oxide Varistor) inside

✔ Interference suppressor filter >45dB @ 1MHz

✔ Low voltage protection level

✔ Failure indication by LED

DSF10/320-10A 3P/C

Surge protective device especially for low-voltage power supply system surge protection at the boundaries from lightning protection zone 2-3 and higher.

✔ Class III (D) SPD in accordance with IEC61643-11 and UL1449-4th

✔ Series type SPD/surge power filter with rated load current

10Amax discharge current 20kA 8/20 per phase

✔ Single phase surge protection

✔ High energy MOV(Metal Oxide Varistor) inside

✔ Interference suppressor filter >40dB @ 1MHz