TekBox TBFL1 - Rent Transient Limiter & 10dB Attenuator

TekBox Transient Limiter:

  • Frequency Range 9kHz to 600MHz (Pass-band)
  • Typically Rented with LISN/AN or Analyzer
  • Prevent Damage to Instrument from Voltage Spikes
  • Band-Pass Filter to Attenuate Out-of-band Signals
  • 10 dB Attenuation in-band up to 600MHz

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The TBFL1 is a combined transient limiter / attenuator / high pass filter, designed to provide optimum protection of spectrum analyser 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.

Pin- and Schottky diodes combined with a multi-stage 10dB attenuator result in a device which can withstand a continuous RF input level of up to 5W (37 dBm). A gas discharge tube provides additional protection against high voltage transients. Furthermore, a 9 kHz high pass filter suppresses harmonics of the mains supply voltage. With a limiting threshold of +11dBm and a flat frequency response from 9 kHz to 600 MHz, the TBFL1 limiter can be used as protective device for the complete range of conducted noise measurements and in many other applications.

Data Sheet


Frequency range: 

9 kHz – 600 MHz


10 dB – 0.5/+1.2 dB in-band (9 kHz to 600 MHz)

Attenuation HP-filter:

 > 30 dB @ 2kHz

Maximum continuous RF input power: 

5W (+37 dBm) in-band

Maximum DC input voltage:

± 20V

Input matching, linear operating range: 

9 kHz - 600 MHz < - 16 dB

Output matching, linear operating range: 

9 kHz - 600 MHz < - 23 dB

Linear operating range:

Up to 0 dBm input level, in-band

Limiting threshold: 

+11 dBm (@ 37dBm input level)

Input connector:


Output connector: 



156 mm x 26 mm x 26mm


170 g

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