A range of extremely compact, encapsulated three phase AC-switches offering efficient and reliable operation. They are intended for use in general purpose and heavy duty applications as control motor starter.
The MT..KB series are compact, encapsulated three‑phase AC switches designed for general‑purpose and heavy‑duty motor starter applications. They feature high thermal conductivity, an electrically insulated case, and a high power‑to‑volume ratio.
The bulletin provides detailed electrical ratings (voltage, current, dv/dt), thermal and mechanical specifications, optional hardware options, and mounting instructions. Graphs illustrate current‑rating characteristics, forward voltage drop, and thermal impedance.
| Isolation voltage (Vins RMS) | 4000 V |
|---|---|
| Current ratings (A) | 50 A / 90 A / 100 A |
| dv/dt rating | 500 V/µs (standard) / 1000 V/µs (S90 option) |
| Operating temperature range | -40 °C to 125 °C |
| Storage temperature range | -40 °C to 125 °C |
| Weight | 225 g |
The MT..KB series provides a RMS isolation voltage of 4000 V.
The standard dv/dt rating is 500 V/µs; the S90 option raises it to 1000 V/µs.
Current ratings of 50 A, 90 A, and 100 A are offered, identified by the codes 5, 9, and 10 respectively.