YD/T 4517.3-2023
Electromagnetic compatibility requirements and measurement methods for Internet of Vehicles communication equipment Part 3: Vehicle Ethernet communication equipment (English Version)

Standard No.

YD/T 4517.3-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

Latest

YD/T 4517.3-2023

Introduction

Interpretation of the core content of the standard

As the third part of the series of standards for "Electromagnetic compatibility requirements and measurement methods for vehicle network communication equipment", this document specifically proposes technical requirements for the electromagnetic compatibility (EMC) of vehicle Ethernet communication equipment. The standard applies to equipment such as vehicle gateways and domain controllers that include Ethernet ports, covering 12V/24V electrical system environments.

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Key Technical Requirements

Test Category	Frequency Range	Limit Requirements	Reference Standard
Radiated Disturbance	0.15MHz-2.5GHz	Peak ≤66dBμV/m（0.15-0.3MHz）	GB/T 18655-2018
Conducted Disturbance (Voltage Method)	0.15MHz-108MHz	Average ≤50dBμV（0.5-1.8MHz）	GB/T 18655-2018
Large Current Injection Immunity	1MHz-400MHz	60mA (90% frequency band)	GB/T 33014.4

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Test Implementation Points

Test Configuration Principles

• Power Supply Voltage: 12V System (13±1)V, 24V System (26±2)V
• The in-vehicle Ethernet port needs to maintain >90% traffic load (disturbance test)
• The immunity test packet length ≥1200 bytes, the total traffic ≥80%

Performance Criteria Classification

Criterion A: The functions are fully normal during the test, and the packet loss rate meets the IEEE 802.3bw/bp requirements

Criterion B: Temporary performance degradation is allowed, and it recovers automatically after the test

Criterion C: Communication interruption is allowed without affecting driving safety

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Technology Evolution Analysis

This standard proposes special EMC requirements for in-vehicle Ethernet devices for the first time. Compared with the traditional CAN/LIN bus:

• The upper limit of the test frequency is extended to 6GHz (the original standard is up to 2.5GHz)
• Added 100BASE-T1/1000BASE-T1 specific test modes
• Introduced new test methods such as capacitive coupling clamp (CCC)

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Implementation recommendations

1. Preferably use shielded twisted pair (compliant with IEEE 802.3bw/bp)
2. Power ports must be equipped with TVS diodes to deal with transient pulses
3. It is recommended to verify harness coupling protection through BCI testing

YD/T 4517.3-2023 Referenced Document

• GB/T 18655-2018 Vehicles, boats and internal combustion engines—Radio disturbance characteristics—Limits and methods of measurement for the protection of on-board receivers
• GB/T 19951 Road vehicles—Disturbances test methods for electrical/electronic component from electrostatic discharge
• GB/T 21437.2 Road vehicles—Test method of electrical disturbances from conduction and coupling—Part 2: Electrical transient conduction along supply lines only
• GB/T 21437.3 Road vehicles—Test method of electrical disturbances from conduction and coupling—Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines
• GB/T 33014.2 Test methods for the immunity of electrical/electronic components of road vehicles to narrowband radiated electromagnetic energy - Part 2: Anechoic chamber method*， 2025-08-01 Update
• GB/T 33014.4 Test methods for immunity of electrical/electronic components of road vehicles to narrowband radiated electromagnetic energy - Part 4: Harness excitation method*， 2025-08-01 Update
• IEEE 802.3bp Ethernet Amendment 4: Physical Layer Specifications and Management Parameters for 1 Gb/s Operation over a Single Twisted-Pair Copper Cable (IEEE Computer Society)
• IEEE 802.3bw Ethernet Amendment 1: Physical Layer Specifications and Management Parameters for 100 Mb/s Operation over a Single Balanced Twisted Pair Cable (100BASE-T1) (IEEE Computer Society)

YD/T 4517.3-2023 history

• 2023 YD/T 4517.3-2023 Electromagnetic compatibility requirements and measurement methods for Internet of Vehicles communication equipment Part 3: Vehicle Ethernet communication equipment

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