Line Impedance Stabilisation Network (LISN)

A Line Impedance Stabilisation Network (LISN), also known as an Artificial Mains Network (AMN), is a low-pass filter device placed between an AC or DC power source and the Equipment Under Test (EUT). It creates a stable, standardised electrical environment for measuring the amount of RF noise a device “injects” back into the power grid.

Why Choose a LISN?

Standardised Impedance: Power grids vary by building and location; a LISN provides a constant 50Ω (or 5µH / 50µH) impedance, ensuring your EMI measurements are repeatable regardless of where you test.
Noise Isolation: It acts as a massive filter that blocks "pollution" (pre-existing RF noise) coming from your building’s wall outlet, so you only measure the noise generated by your specific device.
Safe Signal Extraction: It safely couples the high-frequency interference from the power line to a 50Ω BNC port, allowing you to connect a sensitive spectrum analyser without risking high-voltage damage.
Compliance Alignment: Most emissions standards (CISPR 11/22, FCC Part 15) explicitly require a LISN for conducted emissions testing to ensure data is legally valid for CE or UKCA marking.

Core Applications

Conducted Emissions Testing: Measuring the high-frequency "hash" generated by switching power supplies (SMPS) to ensure it doesn't exceed legal limits and interfere with other electronics.
Power Supply Characterisation: Helping R&D engineers see the raw noise profile of their DC-DC converters or AC-DC adapters during the design phase.
Filter Effectiveness Testing: Verifying how well an internal EMI filter is working by comparing noise levels with and without the filter engaged under a stable load.
Automotive & Aerospace Testing: Specialized LISNs (like $5 mu H$ models) are used to simulate the specific wiring harness impedances found in cars and aircraft for ISO and MIL-STD testing.

Product NameImageImpendanceFrequency RangePathCurrentVoltageEUT SocketAdditional FeaturesStandardStockPrice
TBL0110-2Image of Tbl01101µH//50Ω30 Hz – 500 MHz210A60V nominal, Component rating: 100V4mm (banana)100mΩ serial resistorECSS-E-ST-20-07C Rev 1 Standard1£835.00
TBL0225-2Image of Tbl02252µH//50Ω10 Hz – 200 MHz225A60V nominal, Component rating: 100V4mm (banana)100mΩ serial resistorECSS-E-ST-20-07C Rev 1 StandardOn Backorder£1,626.00
TBL50100-1Image of Tbl50100 1 50uh line impedance stabilisation network lisn – cispr50µH//50Ω (50µH+5Ω)//50Ω150 kHz - 30 MHz1100A250VPhoenix High CurrentCan be jumpered 50µH//50Ω or (50µH+5Ω)//50Ω no 250uH pre-filterCISPR 16-1-2 StandardOn Backorder£1,297.00
TBLDC32-2 V-Y-Δ DCImage of Tbldc32 2 front150Ω9kHz – 30 MHz232A1000V DC4mm, safety150 Ohm DC LISN A, B, Common Mode Differential Mode operationCISPR 16-1-2 and CISPR 11 StandardOn Backorder£1,815.00
TBISN-T4Image of Tbisn t4 telonicuk150 Ω± 20 Ω150 kHz – 30 MHz-250mA63V AC / 100V DC--CISPR 16-1-2, CISPR 22, CISPR 32 & CISPR 15On Backorder£807.00
TBL0510-1Image of Tbl0510 1 telonicuk5µH//50Ω150 kHz – 108 MHz110A60V nominal, Component rating: 250V4mm (banana)-CISPR-25 Standard3£252.00
TBL05-100-1-B-Image of Tbl05100 1 b angle telonicuk5µH//50Ω10 kHz – 400 MHz1100A0 – 500V AC @50/60 Hz, 250V AC @ 400Hz, 1000V DCPhoenix High CurrentCan be jumpered to various standardsVarious (See for details)On Backorder£1,222.00
TBL0550-1Image of Tekbox tbl0550 1 lisn front5µH//50Ω150 kHz – 108 MHz150A60V nominal, Component rating: 250VPhoenix High Current-Various (See for details)1£512.00
TBL5008-2BImage of New project50µH+5 Ω // 50Ω9 kHz - 30 MHz28A Max250V / AC 50-60Hz or DCCountry specific mains socketseparate RF outputs enabling LISN-Mate connectivity; Artificial hand connection PE switchable: 50Ω//50µHCISPR 16-1-23£619.00
TBL5008-2CImage of Tekbox tbl5008 2c front telonic uk50µH+5 Ω // 50Ω9 kHz - 30 MHz28A Max250V / AC 50-60Hz or DCCountry Specific Mains SocketFilter/Limiter/ Attenuator switchable Artificial hand connection PE switchable: 50Ω//50µHCISPR 16-1-21£686.00
TBL5016-1Image of Tekbox tbl5016 1 front50µH//50Ω (50µH+5Ω)//50Ω150 kHz - 30 MHz116A250VPhoenix High CurrentCan be jumpered 50µH//50Ω or (50µH+5Ω)//50Ω no 250uH pre-filterCISPR 16-1-2 and MIL-STD-461F StandardOn Backorder£578.00
TBL5016-2BImage of Tekbox tbl5016 2b front telonic uk(50µH+5Ω)//50Ω9 kHz – 30 MHz216A250V AC 50/60 Hz or DCCountry specific mains socketSeparate RF outputs enabling LISN-Mate connectivity; Artificial hand connection PE switchable: 50Ω//50µH - 3£653.00
TBL5016-2CImage of Tekbox tbl5016 2c front telonic uk(50µH+5Ω)//50Ω9 kHz – 30 MHz216A250V AC 50/60 Hz or DCCountry specific mains socketFilter/Limiter/ Attenuator switchable Artificial hand connection PE switchable: 50Ω//50µH - 1£884.00
TBL5016-3Image of Tbl5016 3 50uh 3 phase line impedance stabilisation network lisn – cispr 16 telonic uk(50µH+5Ω)//50Ω9 kHz – 30 MHz316A450V/240VСЕЕ/ЕС60309Artificial hand connection PE switchable: 50Ω//50µHCISPR 16-1-2 StandardOn Backorder£1,848.00
TBL5032-3Image of Tbl5032 50uh line impedance stabilisation network lisn – cispr 16 telonic uk(50µH+5Ω)//50Ω9 kHz – 30 MHz332A450V/240VСЕЕ/ЕС60309Artificial hand connection PE switchable: 50Ω//50µHCISPR 16-1-2 StandardOn Backorder£2,324.00
TBL5063-3Image of Tbl5063 3 front telonicuk50 Ω // (50 µH + 5 Ω)9 kHz to 30 MHz-63A @ 23°C each (Max)690V/400V / 50 – 60 HzCEE / IEC60309, 3L+N+PE, 63A, female-CISPR 16-1-2On Backorder£5,256.00
TBLM2Image of Tblm-150 kHz – 110 MHz----LISN Mate - 2£239.00
TBLVHF-BImage of Tblvhf b telonicuk-30-300 MHz------On Backorder£807.00