Com-Power LIT-930A Transient Limiter
Frequency Range: 9 kHz - 30 MHz
Transient Limiter Limits input voltage when conducted EMI emissions measurement are conducted using Line Impedance Stabilisation Network (LISN). The EMC receiver input is connected live and neutral line of the product via the LISN. The LISN blocks the supply voltage from LISN RF port but allow the RF signal to pass without much attenuation, so that it can be measured with a EMC receiver. Because the RF signal must be passed through, any short transients (a few microseconds or less) on the power supply lines will also be passed through.