The devices provide superior clamping characteristics compared to standard silicon avalanche diodes by using Littelfuse's proprietary Foldbak technology to ensure that the clamping voltage is lower than avalanche voltage but above rated working voltage. This means any voltage rise from increased current conduction is kept to a minimum, providing the best possible protection.
The diodes are provided in the SMTO-218 compact package (above) and enable designers to save board space, as well as being easier to manufacture than current AK TVS families. They are aimed at cell phone base stations, industrial transient voltage surge suppressors (TVSS), railway trackside signalling and control cabinets, power grid & power distribution systems and defence & avionics applications.
There are two families of devices in the series, with a 6kA surge capability for the LTKAK6 and 10kA surge capability for the LTKAK10 (8x20µs waveform). Both the LTKAK6 and LTKAK10 can be connected in series and/or parallel to create various capability and flexible protection solutions.