It is an asymmetrical-bidirectional thyristor surge protective device (SPD). It is designed to limit the peak voltages on the RLINE (Ring Line) terminal of ‘7581/2/3 LCAS (Line Card Access Switch) devices. The voltages are chosen to give RLINE terminal protection for all LCAS switch conditions. The most potentially stressful condition is low level power cross when the switches are closed. Under this condition, it limits the voltage and corresponding LCAS dissipation until the LCAS thermal trip operates and opens the switchesThis high current protection device is in a plastic SMB package (JEDEC DO-214AA) and supplied in embossed tape reel pack.
Optimized LCAS RLINE Protector
Battery Voltage Range of -40 V to -60 V
Power Fault Conditions
Lightning Impulse Conditions
LCAS Characteristic Temperature Range
Battery-Backed Ringing Circuits Voltage Swing +148 V to -206 V