Circuit & System Protection


Low height 100 A dual surge protectors

1 August 2001 Circuit & System Protection

Power Innovations' high current telecom surge protector, the TISP3xxxH3SL, provides guaranteed 200 A 10/700 and 100 A 10/1000 overvoltage protection in the lowest height through-hole package currently available. At only 8,3 mm high, the device is more than 30% smaller than alternative solutions, and yet offers twice the surge current ratings according to the manufacturer. This enables even low profile cards to meet the impulse current requirement of ITU-T K20/21, FCC part 68, GR-1089-CORE and 13124 with no additional series resistance.

The TISP3xxxH3SL provides dual, bi-directional overvoltage protection with a comprehensive range of protection voltages from 70 to 400 V, giving designers maximum flexibility in the protection of nonSMT telephone equipment, especially for exposed locations or where additional current safety margin is required.

The device integrates multiple high current, voltage triggered bi-directional thyristors in a single chip. This ensures precise control and matching of trigger voltage for reliable protection, a low 'on-state' voltage, and high holding current to avoid latch-up once the surge has been cleared. The TISP3xxxH3SL features low differential capacitance of less than 67 pF between -2 and -50 V bias.



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