TBOH01 5uH Line Impedance Stabilisation Network LISN – CISPR 25

The TBOH01 5uH LISN is a device required to setup conducted noise measurements of DC-powered devices.

It is designed to be used for EMC pre-testing in the frequency range of 150kHz to 110 MHz.
The LISN is inserted into the supply line of the DUT (Device Under Test). Conducted noise which is present at the supply terminals of the DUT can be measured at the BNC connector using a spectrum analyzer or a measurement receiver.

The source (supply) terminal and the DUT terminal are decoupled by a 5µH inductor.


  • Frequency range: 100kHz – 110MHz (1GHz, see figure 4 in the manual)
  • DC Resistance: 40 mΩ
  • Maximum current: 10A
  • Nominal operating voltage range: 0 – 60V DC *

* The operating voltage range is limited to 60V DC for safety reasons. Though the component rating of the LISN is ≥ 200V, the positive supply voltage could accidentally be connected to the negative terminal of the LISN and thereby to the LISN housing. Under this circumstance, a DC voltage > 60V  could cause a lethal electric shock when touching the housing.


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Dr. Min Zhang from Mach One Design EMC consulting demonstrates the accuracy of his conducted noise pre-compliance test set-up, consisting of Tekbox TBOH01 LISN, EMCview software, shielded tent and Siglent spectrum analyzer, resulting in perfect confidence

A conducted EMC pre-compliance test guide by Dr. Min Zhang of Mach One Design, an engineering consulting firm (www.mach1design.co.uk) based in Oxford, UK


Often purchased together with:

Tekbox shielded bags TBSB

Tekbox shielded tents TBST