SIDACtor components are solid state crowbar devices designed to protect telecom equipment during hazardous transient conditions. Capitalizing on the latest in thyristor advancements, Littelfuse makes SIDACtor devices with a patented ion implant technology. This technology ensures effective protection within nanoseconds, up to 3000 A 1.2-50-8/20 surge current ratings, and simple solutions for regulatory requirements such as GR 1089, TIA-968-B (formerly known as FCC Part 68), ITU-T K.20, ITU-T K.21, and UL 60950-1.
In the standby mode, SIDACtor devices exhibit a high off-state impedance, eliminating excessive leakage currents and appearing transparent to the circuits they protect. Upon application of a voltage exceeding the switching voltage (VS), SIDACtor devices crowbar and simulate a short circuit condition until the current flowing through the device is either interrupted or drops below the SIDACtor device’s holding current (IH). Once this occurs, SIDACtor devices reset and return to their high off-state impedance.
