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	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	On Backorder	£1,626.00
TBL50100-1	50µH // 50Ω, (50µH+5Ω) // 50Ω	150 kHz – 30 MHz	1	100A	250V	Phoenix High Current	Jumperable impedance networks, no 250µH pre-filter	CISPR 16-1-2	On Backorder	£1,297.00
TBLDC32-2 V-Y-Δ DC	150Ω	9 kHz – 30 MHz	2	32A	1000V DC	4mm safety	150Ω DC LISN A/B, Common Mode & Differential Mode operation	CISPR 16-1-2, CISPR 11	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 75cm RG58, 2x BNC-Male to BNC-Male 35cm RG223	CISPR-25, MIL-STD-461F, DO-160, AECTP-500, ISO 7637-2	On Backorder	£628.00
TBISN-T4	150Ω	150 kHz – 30 MHz	2	250mA	63V AC, 100V DC	D-Sub 25	2 pcs D-Sub 25 to RJ45 adapters	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)	None	CISPR-25	On Backorder	£252.00
TBL05-100-1-B-	5µH // 50Ω	10 kHz – 400 MHz	1	100A	0–500V AC @ 50/60 Hz, 250V AC @ 400 Hz, 1000V DC	Phoenix High Current	Jumper configurable to various standards	CISPR 16-1-2, MIL-STD-461G	1	£1,222.00
TBL05100-1C	5µH // 50Ω	150 kHz – 400 MHz	1	100A	0–500V AC @ 50/60 Hz, 250V AC @ 400 Hz, 1000V DC	Wing-nut binding post	Jumper configurable to various standards	CISPR 25, MIL-STD-461G, ISO 11452-4, ISO 7637-2	On Backorder	£1,226.00
TBL0550-1B	5µH // 50Ω	150 kHz – 400 MHz	1	50A	250V DC, 250V AC @ 50/60 Hz, 130V AC @ 400 Hz	Wing-nut binding post	Jumper configurable to various standards	CISPR-25, MIL-STD-461F, DO-160, AECTP-500, ISO 7637-2	On Backorder	£577.00
TBL5008-2B	(50µH+5Ω) // 50Ω	9 kHz – 30 MHz	2	8A Max	250V AC @ 50-60 Hz / 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+5Ω) // 50Ω	9 kHz – 30 MHz	2	8A Max	250V AC @ 50-60 Hz / DC	Country specific mains socket	Switchable Filter/Limiter/Attenuator, 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	16mm 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	Jumper configurable to various standards	CISPR 16-1-2, MIL-STD-461F	On Backorder	£578.00
TBL5016-2B	(50µH+5Ω) // 50Ω	9 kHz – 30 MHz	2	16A	250V AC @ 50/60 Hz / DC	Country specific mains socket	Artificial hand connection PE switchable (50Ω // 50µH)	CISPR 16-1-2	2	£653.00
TBL5016-2C	(50µH+5Ω) // 50Ω	9 kHz – 30 MHz	2	16A	250V AC @ 50/60 Hz / DC	Country specific mains socket	Switchable Filter/Limiter/Attenuator, 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/IEC 60309	Artificial hand connection PE switchable (50Ω // 50µH)	CISPR 16-1-2	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)	Jumper configurable to various standards	CISPR 16-1-2, MIL-STD-461G	On Backorder	£692.00
TBL5032-3	(50µH+5Ω) // 50Ω	9 kHz – 30 MHz	3	32A	450V, 240V	CEE/IEC 60309	Artificial hand connection PE switchable (50Ω // 50µH)	CISPR 16-1-2	On Backorder	£2,324.00
TBL5063-3	(50µH+5Ω) // 50Ω	9 kHz – 30 MHz	3	63A @ 23°C each (Max)	690V, 400V	CEE/IEC 60309, 3L+N+PE, 63A female	Separate RF outputs enabling LISN-Mate connectivity, Artificial hand connection PE switchable (50Ω // 50µH)	CISPR 16-1-2	On Backorder	£5,256.00
TBLVHF-B	50Ω ±10%	30 MHz – 300 MHz	2	16A	250V DC	Country specific mains socket	Balanced VHF LISN	CISPR 16-1-4	On Backorder	£807.00