Support

With over a thousand cooperative customers and 17 years of service experience, we can provide you with everything from model selection to technical support

Home Support FAQ

How to optimize the EMC of the relay output of an intelligent low-voltage monitoring unit?

Time：2026-01-14 Views：509次

Share：

Multiple measures are employed to optimize the relay output EMC. A 1N4007W freewheeling diode and a 470Ω/1W resistor are connected in parallel across the relay coil. An RC snubber circuit (100Ω + 10nF/100V) is connected in parallel across the contacts. A PBZ2012E600Z0T ferrite bead (600Ω@100MHz) is connected in series on the output line. PCB layout: The relay is kept away from sensitive circuits. A metal shield is added to the relay. Through this optimization, the relay output EMI is reduced by more than 35dB, lifespan is extended, and the IEC 61000-4-4 EFT test requirements are met.

Previous：How to control EMC consistency in mass production of motion controllers (MC)

Next：How to suppress lightning overvoltage in frequency converters

Return

2026-02-09

Specific strategies for low-cost EMC optimization of intelligent low-voltage monitoring units are listed, including integrated components, PCB optimization, software filtering, and substitution of domestically produced components.

How to adapt the intelligent low-voltage monitoring unit to EMC in industrial low-voltage environments?

2026-02-09

This section describes the technical solution for adapting intelligent low-voltage monitoring units to EMC requirements in industrial low-voltage environments through rigorous interference protection, wideband filtering, and enhanced testing.

How can the initial design of intelligent low-voltage monitoring units avoid the need for later rectification?

2026-02-09

A technical strategy to avoid the need for later rectification of intelligent low-voltage monitoring units by incorporating EMC design throughout the entire process, including design review and simulation verification.

Surge Protective Device

Energy infrastructure

Patent Qualifications

Production Management

Organizational Structure

Benefits and Compensation

Search jobs

Contact Us

Consultation Hotline：

+86 18721669954

Contact Address：

4th Floor, Building 9, Shuimu Garden, Tus-Caohejing (Zhongshan) Science and Technology Park, No. 199, Guangfulin East Road, Songjiang District, Shanghai

Contact Email：

global@yint.com.cn

沪公网安备31011702889749号

Technical Support：: JijinWeb