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 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
TBL0110-2	1µH//50Ω	30 Hz – 500 MHz	2	10A	60V nominal, Component rating: 100V	4mm (banana)	100mΩ serial resistor	ECSS-E-ST-20-07C Rev 1 Standard	1	£835.00
TBL0225-2	2µH//50Ω	10 Hz – 200 MHz	2	25A	60V nominal, Component rating: 100V	4mm (banana)	100mΩ serial resistor	ECSS-E-ST-20-07C Rev 1 Standard	On Backorder	£1,626.00
TBL50100-1	50µH//50Ω (50µH+5Ω)//50Ω	150 kHz - 30 MHz	1	100A	250V	Phoenix High Current	Can be jumpered 50µH//50Ω or (50µH+5Ω)//50Ω no 250uH pre-filter	CISPR 16-1-2 Standard	On Backorder	£1,297.00
TBLDC32-2 V-Y-Δ DC	150Ω	9kHz – 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
DC-LISN-Combo1C	5µH//50Ω	10 Hz – 400 MHz 150 kHz – 110 MHz	2	10A	60V nominal, Component rating: 200V	4mm (banana)	2x TBL0510-1, TBLM02, BNC Termination, N-Male to BNC-Male 75 cm RG58, 2x BNC-Male to BNC-Male 35 cm RG223	CISPR-25 (EN 55025), MIL-STD-461F, DO-160, AECTP-500, ISO 7637-2	On Backorder	£628.00
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	5µH//50Ω	150 kHz – 108 MHz	1	10A	60V nominal, Component rating: 250V	4mm (banana)	-	CISPR-25 Standard	On Backorder	£252.00
TBL05-100-1-B-	5µH//50Ω	10 kHz – 400 MHz	1	100A	0 – 500V AC @50/60 Hz, 250V AC @ 400Hz, 1000V DC	Phoenix High Current	Can be jumpered to various standards	Various (See for details)	1	£1,222.00
TBL05100-1C	5µH//50Ω	150 kHz – 400 MHz	1	100A	Component rating: 0-500V @ 50/60 Hz 250V AC @ 400Hz 1000V DC	wing-nut binding post	Various Standards	CISPR 25, MIL-STD-461G, ISO11452-4, ISO 7637-2	On Backorder	£1,226.00
TBL0550-1	5µH//50Ω	150 kHz – 108 MHz	1	50A	60V nominal, Component rating: 250V	Phoenix High Current	-	Various (See for details)	On Backorder	£512.00
TBL0550-1B	5µH//50Ω	150 kHz – 400 MHz	1	50A	Max. 250V DC 250V AC 50/60Hz 130V AV 400 Hz	wing-nut binding post	jumper configurable CISPR 25 MIL-STD-461G DO-160	CISPR-25 (EN 55025), MIL-STD-461F, DO-160, AECTP-500, ISO 7637-2	On Backorder	£577.00
TBL5008-2B	50µH+5 Ω // 50Ω	9 kHz - 30 MHz	2	8A Max	250V / AC 50-60Hz or DC	Country specific mains socket	Separate RF outputs enabling LISN-Mate connectivity; Artificial hand connection PE switchable: 50Ω//50µH	CISPR 16-1-2	On Backorder	£619.00
TBL5008-2C	50µH+5 Ω // 50Ω	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: 50Ω//50µH	CISPR 16-1-2	On Backorder	£686.00
TBL501000-1	50µH//50Ω	150 kHz – 30 MHz	1	1000A	1000V DC 500V AC	16 mm wing terminals	Internal HPF	CISPR 16-1-2	On Backorder	£5,136.00
TBL5016-1	50µH//50Ω (50µH+5Ω)//50Ω	150 kHz - 30 MHz	1	16A	250V	Phoenix High Current	Can be jumpered 50µH//50Ω or (50µH+5Ω)//50Ω no 250uH pre-filter	CISPR 16-1-2 and MIL-STD-461F Standard	On Backorder	£578.00
TBL5016-2B	-	(50µH+5Ω)//50Ω	9 kHz – 30 MHz	2	16A	250V AC 50/60 Hz or DC	Country specific mains socket	CISPR 16-1-2	2	£653.00
TBL5016-2C	(50µH+5Ω)//50Ω	9 kHz – 30 MHz	2	16A	250V AC 50/60 Hz or DC	Country specific mains socket	Filter/Limiter/ Attenuator switchable Artificial hand connection PE switchable: 50Ω//50µH	CISPR 16-1-2	On Backorder	£884.00
TBL5016-3	(50µH+5Ω)//50Ω	9 kHz – 30 MHz	3	16A	450V/240V	CEE/IEC60309	Artificial hand connection PE switchable: 50Ω//50µH	CISPR 16-1-2 Standard	1	£1,848.00
TBL5032-1	50µH//50Ω (50µH+5Ω)//50Ω	10 kHz –30 MHz	1	32A	500V DC 270V AC (50/60 Hz) 120V AC (400 Hz)	4mm (banana)	can be jumpered to CISPR 16 50µH//50Ω or MIL-STD (50µH+5Ω)//50Ω no 250uH pre-filter	CISPR 16-1-2, MIL-STD-461G	On Backorder	£692.00
TBL5032-3	9 kHz – 30 MHz	3	32A	450V/240V	CEE/IEC 60309	Artificial hand connection PE switchable: 50Ω//50µH	CISPR 16-1-2 Standard	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
TBLVHF-B	-	30-300 MHz	-	-	-	-	-	-	On Backorder	£807.00