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 Name	Impendance	Frequency Range	Path	Current	Voltage	EUT Socket	Additional Features	Standard	Stock	Price
TBL5008-2B-Rental	50ÂµH+5 Î© // 50Î©	9 kHz - 30 MHz	2	8A Max	250V / AC 50-60Hz or DC	Country speciï¬c mains socket	separate RF outputs enabling LISN-Mate connectivity; Artificial hand connection PE switchable: 50Î©//50ÂµH	CISPR 16-1-2	1	£143.00
TBL0110-2	1ÂµH//50Î©	30 Hz â€“ 500 MHz	2	10A	60V nominal, Component rating: 100V	4mm (banana)	100mÎ© serial resistor	ECSS-E-ST-20-07C Rev 1 Standard	1	£835.00
TBL0225-2	2ÂµH//50Î©	10 Hz â€“ 200 MHz	2	25A	60V nominal, Component rating: 100V	4mm (banana)	100mÎ© serial resistor	ECSS-E-ST-20-07C Rev 1 Standard	On Backorder	£1,626.00
TBL50100-1	50ÂµH//50Î© (50ÂµH+5Î©)//50Î©	150 kHz - 30 MHz	1	100A	250V	Phoenix High Current	Can be jumpered 50ÂµH//50Î© or (50ÂµH+5Î©)//50Î© no 250uH pre-filter	CISPR 16-1-2 Standard	On Backorder	£1,297.00
TBLDC32-2 V-Y-Δ DC	150 Ohm	9kHz â€“ 30 MHz	2	32A	1000V DC	4mm, safety	150 Ohm DC LISN A, B, Common Mode Differential Mode operation	CISPR 16-1-2 and CISPR 11 Standard	On Backorder	£1,815.00
TBISN-T4	150 Ω± 20 Ω	150 kHz – 30 MHz	-	250mA	63V AC / 100V DC	-	-	CISPR 16-1-2, CISPR 22, CISPR 32 & CISPR 15	On Backorder	£807.00
TBL0510-1	5ÂµH//50Î©	150 kHz â€“ 108 MHz	1	10A	60V nominal, Component rating: 250V	4mm (banana)	-	CISPR-25 Standard	On Backorder	£252.00
TBL05-100-1-B-	5ÂµH//50Î©	10 kHz â€“ 400 MHz	1	100A	0 â€“ 500V AC @50/60 Hz, 250V AC @ 400Hz, 1000V DC	Phoenix High Current	Can be jumpered to various standards	Various (See for details)	On Backorder	£1,222.00
TBL0550-1	5ÂµH//50Î©	150 kHz â€“ 108 MHz	1	50A	60V nominal, Component rating: 250V	Phoenix High Current	-	Various (See for details)	1	£512.00
TBL5008-2B	50ÂµH+5 Î© // 50Î©	9 kHz - 30 MHz	2	8A Max	250V / AC 50-60Hz or DC	Country speciï¬c mains socket	separate RF outputs enabling LISN-Mate connectivity; Artificial hand connection PE switchable: 50Î©//50ÂµH	CISPR 16-1-2	3	£619.00
TBL5008-2C	50ÂµH+5 Î© // 50Î©	9 kHz - 30 MHz	2	8A Max	250V / AC 50-60Hz or DC	Country Specific Mains Socket	Filter/Limiter/ Attenuator switchable Artificial hand connection PE switchable: 50Î©//50ÂµH	CISPR 16-1-2	1	£686.00
TBL5016-1	50ÂµH//50Î© (50ÂµH+5Î©)//50Î©	150 kHz - 30 MHz	1	16A	250V	Phoenix High Current	Can be jumpered 50ÂµH//50Î© or (50ÂµH+5Î©)//50Î© no 250uH pre-filter	CISPR 16-1-2 and MIL-STD-461F Standard	On Backorder	£578.00
TBL5016-2B	(50ÂµH+5Î©)//50Î©	9 kHz â€“ 30 MHz	2	16A	250V AC 50/60 Hz or DC	Country speciï¬c mains socket	Separate RF outputs enabling LISN-Mate connectivity; Artificial hand connection PE switchable: 50Î©//50ÂµH	-	3	£653.00
TBL5016-2C	(50ÂµH+5Î©)//50Î©	9 kHz â€“ 30 MHz	2	16A	250V AC 50/60 Hz or DC	Country speciï¬c mains socket	Filter/Limiter/ Attenuator switchable Artificial hand connection PE switchable: 50Î©//50ÂµH	-	3	£884.00
TBL5016-3	(50ÂµH+5Î©)//50Î©	9 kHz â€“ 30 MHz	3	16A	450V/240V	Ð¡Ð•Ð•/Ð•Ð¡60309	Artificial hand connection PE switchable: 50Î©//50ÂµH	CISPR 16-1-2 Standard	On Backorder	£1,848.00
TBL5032-3	(50ÂµH+5Î©)//50Î©	9 kHz â€“ 30 MHz	3	32A	450V/240V	Ð¡Ð•Ð•/Ð•Ð¡60309	Artificial hand connection PE switchable: 50Î©//50ÂµH	CISPR 16-1-2 Standard	On Backorder	£2,324.00
TBL5063-3	50 Ω // (50 µH + 5 Ω)	9 kHz to 30 MHz	-	63A @ 23°C each (Max)	690V/400V / 50 – 60 Hz	CEE / IEC60309, 3L+N+PE, 63A, female	-	CISPR 16-1-2	On Backorder	£5,256.00
TBLM2	-	150 kHz â€“ 110 MHz	-	-	-	-	LISN Mate	-	2	£239.00
TBLVHF-B	-	30-300 MHz	-	-	-	-	-	-	On Backorder	£807.00