MD7FB is a FOUNDATION Fieldbus surge arrester from M-SYSTEM company. It has a super high capacity of 20kA (8/20μs) and 1kA (10/350μs). It is a thin type surge arrester with a thickness of only 7mm, which is space-saving and suitable for multi-point protection.
This manual describes the MD7FB lightning arrester, a thin‑profile (7 mm) device designed for fieldbus applications. It outlines the product’s high‑capacity surge protection (up to 20 kA) and its compliance with IEC and ATEX safety standards.
The document includes detailed specifications, grounding methods (DIN earthing), terminal connections, operating temperature and humidity ranges, as well as installation guidelines and wiring diagrams for safe integration into industrial systems. This manual is written in Chinese.
| Surge Current Rating | 20 kA (8/20 µs) / 1 kA (10/350 µs) |
|---|---|
| Maximum Voltage (Umax) | 32 V |
| IP Protection Rating | IP20 |
| Weight | 70 g |
| Operating Temperature Range | -25 °C to +85 °C |
| Humidity Range | 30 % to 90 % RH |
| Grounding Method | DIN earthing |
| Power Consumption | 1.3 W |
It can handle up to 20 kA (8/20 µs) and 1 kA (10/350 µs).
The device is rated IP20.
It must be grounded using a DIN earthing connection.
The arrester operates from –25 °C up to +85 °C.