The TBFL1 from TEKBOX Digital Solutions is a Transient Limiter that operates from 9 kHz to 600 MHz. It combines a limiter, attenuator and high-pass filter and can be used as protective device for the complete range of conducted noise measurements and in many other applications. This limiter has PIN and Schottky diodes, a multi-stage 10 dB attenuator and can withstand a continuous RF input power of up to 5W (37 dBm). It uses a gas discharge tube that provides additional protection against high voltage transients. The limiter also includes a 9 kHz high pass filter that suppresses harmonics of the mains supply voltage.

The TBFL1 is designed to provide optimum protection of spectrum analyzer or measurement receiver inputs when carrying out conducted noise measurements or other measurements where the input levels cannot be predicted with certainty or where accidental overloads may occur. It is available in a module that measures 156 x 26 x 26 mm with N-type (male/female) connectors.