TISP4070J1BJ

The TISP4xxxJ1BJ is a symmetrical voltage-triggered bidirectional thyristor device which has been designed as the tail (ground return) element of a Y circuit configured protector. As such, the TISP4xxxJ1BJ must be rated to conduct the sum of the TIP and RING currents. For example, the normal GR-1089-CORE testing can impose 200 A, 10/1000 and 1000 A, 2/10 on the ground return element of the Y configuration. Using the TISP4xxxJ1BJ together with two TISP4xxxH3BJ parts gives a 2x 100 A, 10/1000 Y protector circuit. For ITU-T applications, using the TISP4xxxJ1BJ with a TISP3xxxT3BJ gives a coordinated Y protector with a 2x 120 A, 5/310 capability. Design tables are given in the Applications Information section. These SMB package combinations are often more space efficient than single package Y protection multi-chip integrations.

These devices TISP4xxxJ1BJ allow signal voltages, without clipping, up to the maximum off-state voltage value, VDRM, see Figure 1. Voltages above VDRM are limited and will not exceed the breakover voltage, V(BO), level. If sufficient current flows due to the overvoltage, the device switches into a lowvoltage on-state condition, which diverts the current from the overvoltage through the device. When the diverted current falls below the holding current, IH, level the devices switches off and restores normal system operation.