MCH-RDSI is the series of devices for discharging transient overvoltages induced in ISDN telephone lines, within the MCH range. In accordance with IEC 61643-21. In-line format.

  • Suitable for the protection of communications equipment connected to ISDN lines. By their nature, they are highly exposed to induced transient overvoltages (surges) associated with meteorological activity.
  • Protection of two telephone pairs.
  • Discharge capacity with an 8/20 μs waveform: 10 kA.
  • No installation required. It connects directly to the equipment to be protected via RJ45 connectors.
  • The MCH range also provides models for the protection of ADSL and PP lines.
Calculating ...


Imax (L1/L2-PE)

Uc (L1/L2-PE)

Up (L1/L2-PE)

In (L1/L2-PE)

No. protected pairs

MCH-RDSI 10 [kA] 18 [V] ≤ 27 [V] 5 [kA] 2 See