professional relay manufacturer in China
Guangzhou MG Electronic Technology Co., Ltd. (Maoguan) is a professional industrial relay manufacturer and the successor to Taiwan’s Beta Electronics (founded in 1973). Since our establishment in 2016, we have leveraged decades of relay expertise to serve customers in over 100 countries with high-quality electromechanical switching solutions. Our comprehensive portfolio includes Industrial Relays, Power Relays, Electromagnetic Relays, Signal Relays, and fully customized Custom Relays. We are driven by innovation and quality, supported by an in-house R&D team and laboratory dedicated to advancing relay technology. With over 200 manufacturing machines and more than 100 testing devices, we rigorously evaluate product performance against international standards such as UL508, IEC, and TUV. All our products comply with stringent safety and environmental certifications including UL, cUL, TUV, CSA, CE, RoHS, and REACH, earning the trust of leading companies worldwide.
High-Quality Industrial relay Tailored to Your Needs
We manufacture different types of relays and support customization to meet your different needs and applications
- Signal relay
Small Signal Relay
- Industrial relay
Lighting Control Relays
- Industrial relay
24V industrial relay
- Industrial relay
High Current Relay
- Electromagnetic relay
24V DC electromagnetic relay
- Electromagnetic relay
Auxiliary Relays
- Signal relay
Railroad Signal Relay
- Signal relay
Railway Relay
Why Choose Us
Advanced R&D & Customization
Our in-house lab and 50+ years of expertise enable innovative, tailored relay solutions for diverse industries.
Rigorous Quality & Global Certifications
All products meet top international standards (UL, CE, RoHS, etc.) through multi-level testing.
Customer-Centric & Responsive Support
We provide 24/7 service, fast communication, and dedicated technical assistance.
Proven Reliability & Industry Trust
Trusted by leading companies worldwide for dependable performance and mature technology
Different industrial relay solutions
Industrial Automation
Our industrial relays and signal relays are engineered for demanding manufacturing environments, providing reliable load switching and signal transmission for automated equipment, motor drives, and control systems.
The products feature safety interlocking, PLC compatibility, and transparent housing design. Industrial relays are suited for high-load scenarios such as motor control and production line equipment, while signal relays are optimized for logic signal conversion and isolation within control panels.
Built for high durability and switching capacity, our industrial relays ensure main circuit safety, while our signal relays guarantee precise and stable control signals. Together, they meet the comprehensive modern industrial demands for reliability, safety, and ease of maintenance.
Industrial Robots
- Joint motor drives utilize electromagnetic power relays, while high-precision positioning scenarios switch to high-frequency solid-state relays.
Safety protections such as emergency stops and light curtains are implemented using safety relays compliant with EN ISO 13849 standards, combined with forcibly guided contact relays, to achieve mandatory main circuit disconnection.
End-effector controls for grippers and welding guns use electromagnetic signal relays, while cleanroom or explosion-proof environments opt for spark-free solid-state relays.
Photovoltaic Industry
- For DC-side isolation and fault interruption in inverters, as well as disconnection in combiner boxes, high-voltage DC power relays are essential. Some photovoltaic storage systems use magnetic latching relays to reduce power consumption.
- Grid connection control and anti-islanding protection rely on AC power relays and frequency relays to enable rapid disconnection from the grid during frequency abnormalities.
Switching for photovoltaic storage charging and discharging requires high-voltage DC relays and pre-charge relays to achieve soft-start and prevent current surges.
Rail Transportation
- The core of signal interlocking systems consists of specialized signal relays (neutral, polarized, and biased types), used for track circuit detection and switch position control, compliant with EN 50155 standards.
Train traction systems utilize high-voltage DC relays for converter control, while auxiliary systems (such as air conditioning and doors) rely on 110VDC electromagnetic intermediate relays for operation.
Safety circuits for emergency braking and ATP interfaces employ safety relays and forcibly guided contact relays to achieve de-energized safety protection.
Common problems with relays
What are the types of relays?
Relays are generally classified into electromagnetic relays, signal relays, power relays, automotive relays, solid-state relays and other industrial relays
What is a relay used for?
Relay: An electric switch that controls high-power circuits with low-power signals. Widely applied in vehicles, home appliances and industrial systems. Enables small-current activation of large loads, circuit isolation protection, and automated power switching
What is the difference between a relay and a regular switch?
Most regular switches are manually operated. A relay is driven by electrical signals, enabling remote and automatic control. It also isolates high and low voltage circuits to protect the control-side circuit.
Industrial relay vs. commercial relay?
Industrial relays have higher load capacity, better environmental resistance, and longer lifespan. Commercial relays are smaller, lower-cost, and suitable for light-duty applications (e.g., household appliances).
What is the working principle of an electromagnetic relay?
Based on electromagnetic induction, a small current through the control coil generates a magnetic field to attract the armature, which drives the contacts to open or close. When the coil loses power, the magnetic field vanishes, the armature resets via the spring, and the contacts revert to their original state.
Core Difference Between Signal and Power Relays?
The core difference is application scenarios and load capacity. Signal relays suit low-voltage (5V/12V), small-current (<1A) signal circuits, prioritizing contact reliability and signal stability for control signal transmission. Power relays handle high-voltage, large-current (≥1A, up to tens of amps) power circuits, focusing on contact anti-welding/ablation and coil overload protection for high-power devices.
Relay News
Stay updated on the latest insights into the relay industry, company news and expert opinions through our blog and news section.
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Get in Touch with Us
If you have any questions about relays, please contact us and we will reply within 24 hours.