How Does a General Purpose Relay Work？
A step-by-step guide to the electromagnetic working principle of general purpose relays, covering coil operation, contact switching, AC/DC differences, and failure mechanisms.
July 16, 2026
HWRELAY is an ISO 9001:2015 certified provider specializing in electrical relays. Our relay offerings are extensively utilized across industrial, commercial, and residential sectors.
Hangwang Electric is a leading manufacturer and supplier of electrical relays
Hangwang Electrical manufacturer Offering a full range of relays for diverse applications, providing reliable, high-performance solutions for industrial, automation, and control systems.
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At Hangwang Electrical manufacturer provide electrical relays that meet the diverse needs of industries around the world. By emphasizing materials, durability, and core technology, our products support a variety of industrial applications.
At HWRELAY, our state-of-the-art factory is the heart of our operations, delivering exceptional quality and reliability in every relay we produce. Equipped with cutting-edge technology and staffed by a team of highly skilled engineers and technicians, our factory adheres to the highest industry standards, including ISO 9001:2015 certification. We combine advanced manufacturing processes with stringent quality controls to ensure that every product that leaves our factory will perform in the most demanding environments.
We sell standard products and also support product customization. The minimum order quantity for standard relays is 10 pieces, while the minimum order quantity for customized products is 500 pieces.
For buyers who are evaluating our products, we will provide 1-2 free samples after a brief photo review—allowing you to experience our quality before placing an order.
Hangwang Electric operates advanced automated relay production lines, covering the entire process from component feeding, precision assembly to finished product inspection. We have introduced modern equipment including tray-type automatic loading systems, servo robotic arms, precision pressing equipment, and HMI intelligent control systems to ensure every product delivers excellent quality and stable performance. Our clean and standardized factory environment, scientific production line layout, and strict quality control system have earned the trust of customers worldwide.
High-grade insulation materials for housing; Silver alloy contacts (AgCdO anti-welding, AgNi wear-resistant); High-purity copper wire coil with insulation coating; Strict incoming quality control from the source.
Fully automated production lines with precision parameter control; Automatic coil winding with break detection; 100% electrical performance testing of components; Precision machining for consistent quality.
Visual inspection & coil resistance measurement; Insulation resistance & pick-up/drop-out voltage test; Contact resistance & contact capacity test; Mechanical life & temperature/humidity/vibration/shock test.
Custom mold tight fit with cushioning protection; Pin protective covers to prevent transport damage; Moisture-resistant packaging with clear labeling; Ensuring products arrive in perfect condition.
HWRelay has passed three international certifications: ISO 9001:2015 Quality Management System, ISO 14001:2015 Environmental Management System, and ISO 45001:2018 Occupational Health and Safety Management System (IAF International Mutual Recognition / CNAS Accreditation), audited and issued by Beijing United Wisdom Certification Co., Ltd. Each certificate and qualification represents our solemn commitment to product quality and customer trust.
Zhejiang Hangwang Electric Technology Co., Ltd. holds three national authorized patents: "Utility Model Patent Certificate for Insertion Riveting Device of Magnetic Circuit Part of Functional High-Power Relay," "Relay - Design Patent Certificate," and "Utility Model Patent Certificate for Relay for Three-Phase Four-Channel Motor Control." The company was also awarded the title of Zhejiang Provincial Science and Technology Enterprise in 2026.
Our customers use HWRELAY relays in real-world industrial environments and share application photos with us. We also welcome factory visits — buyers tour our automated lines, see our QC process, and build long-term partnerships. Every photo and visit reflects real trust in our quality.
We provide a full range of relays — small relays, general-purpose relays, industrial relays, power relays, intermediate relays, electromagnetic relays, and relay bases. Our products serve industrial, commercial, and residential applications worldwide.
We have over 12 years of experience in relay production, with advanced automated manufacturing lines and a skilled engineering team.
Absolutely. We handle everything from initial design and prototyping to volume production, backed by 24-hour technical support and professional test reports.
Yes. The MOQ for standard relays is just 10 pieces, and for custom products it is 500 pieces. We also offer 1–2 free samples for verified buyers after a brief photo review.
We are certified under ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 (all IAF and CNAS accredited). Our products also meet CE and UKCA standards.
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