The LIT-930A from Com-Power is a Transient Limiter that operates from 9 kHz to 30 MHz. It can handle an input power of up to 4 W and withstand a DC voltage of ±15 V. This limiter has an insertion loss of 10 dB (in-band) and a VSWR less than 1.2:1. It protects instruments from damage against transient voltage spikes and acts as band-pass filter(s) to attenuate out-of-band signals.  The transient limiter is available in a module that measures 102.7 mm x 55.6 mm x 37.5 mm with N-type (male/female) connectors and is suited for conducted emissions measurements with LISN.