EM5040 Series LISN

Stable Impedance for Accurate Conducted Emission Measurement

The EM5040 Series is a family of V-type line impedance stabilization networks designed for conducted emission testing and EMC debugging. These LISNs provide a stable impedance environment for the equipment under test while coupling disturbance signals to external receivers or analyzers for accurate measurement.

The series includes multiple configurations for different workflows. EM5040E provides the standard single-phase LISN function, EM5040A adds a built-in 10 dB limiter and optional 150 kHz high-pass filter, EM5040B adds common-mode and differential-mode separation for advanced debugging, and EM5040C targets high-current, higher-frequency single-line testing for industrial and automotive-related applications.

Model Selection Guide

Model	Positioning	Key Function	Best Fit
EM5040E	Standard single-phase LISN	Basic V-type LISN for conducted disturbance voltage measurement	General CE testing and baseline EMC measurement
EM5040A	Protected test setup LISN	Built-in 10 dB limiter and optional 150 kHz high-pass filter	Receiver protection and compliance-oriented workflows
EM5040B	Advanced EMI debugging LISN	CM/DM separator for common-mode and differential-mode analysis	EMI filter debugging and interference root-cause analysis
EM5040C	High-current / high-frequency LISN	100 kHz to 200 MHz range and 100 A rating	Industrial, automotive, and high-current EMC test scenarios

EM5040E — Standard LISN

Parameter	Value
Frequency Range	9 kHz to 30 MHz
Circuit Type	(50uH + 5Ω) ‖ 50Ω Type V
Measurement Circuit	Single phase two wire L/N
AC Voltage	0 to 264 VAC, 50/60 Hz ±5%
DC Voltage	0 to 375 VDC
Current Rating	16 A
Output Connector	50Ω BNC female
Artificial Hand	Yes
Weight	5 kg

EM5040A — Protected LISN

Parameter	Value
Frequency Range	9 kHz to 30 MHz
Circuit Type	(50uH + 5Ω) ‖ 50Ω Type V
Measurement Circuit	Single phase two wire L/N
AC Voltage	0 to 264 VAC, 50/60 Hz ±5%
DC Voltage	0 to 375 VDC
Current Rating	16 A
Output Connector	50Ω BNC female
Limiter	10 dB, 130 dBuV threshold
High-Pass Filter	Optional 9 kHz / 150 kHz
Weight	5.25 kg

EM5040B — CM/DM LISN

Parameter	Value
Frequency Range	9 kHz to 30 MHz
Circuit Type	(50uH + 5Ω) ‖ 50Ω Type V
Measurement Circuit	Single phase two wire L/N
AC Voltage	0 to 264 VAC, 50/60 Hz ±5%
DC Voltage	0 to 375 VDC
Current Rating	16 A
Output Connector	50Ω BNC female
CM/DM Separator	Yes
Weight	5.25 kg

EM5040C — High-Current LISN

Parameter	Value
Frequency Range	100 kHz to 200 MHz
Circuit Type	(5uH + 1Ω) ‖ 50Ω
Measurement Circuit	Single wire
AC Voltage	0 to 250 VAC, 0 to 400 Hz
DC Voltage	0 to 600 V
Current Rating	100 A rated / 500 A short-time
Output Connector	50Ω N female
Weight	1.8 kg

Typical Applications

• Conducted disturbance voltage measurement — standard CE testing per CISPR 16-1-2
• EMC compliance pre-test and formal test preparation — receiver-protected workflows
• EMI filter debugging in switched-mode power designs — CM/DM separation for root-cause analysis
• Common-mode and differential-mode interference analysis — advanced filter characterization
• Industrial and automotive EMC validation — high-current high-frequency testing