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Zhejiang Fanhar Electronics Co., Ltd.

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Custom Electric Latching Relays Manufacturers

The magnetic latching relay is a new type of automatic switching device, which is widely used in many fields such as electricity, smart home, industrial control, and new energy. It maintains the open and closed state of the contacts through the magnetic force of permanent magnets, and triggers the switch only through pulse electrical signals when the state needs to be changed, thereby achieving energy-saving, stable and efficient circuit control. The structure of the magnetic latching relay mainly includes the electromagnetic system and the contact system. The electromagnetic system consists of a coil, an iron core, an armature, and a magnetic steel, which is responsible for generating electromagnetic force to drive the contact action; the contact system consists of a moving contact, a static contact, a moving reed, etc., which is responsible for the conduction and disconnection of the circuit. The contact state of the magnetic latching relay is completely determined by the permanent magnet, so it can still maintain the original state after a power failure, without the need for a continuous power supply.

About Us
Zhejiang Fanhar Electronics Co., Ltd.

Zhejiang Fanhar Electronics Co., Ltd. is China Custom Energy-Efficient Electric Latching Relay Suppliers and Magnetic Latching Relay Manufacturers, a national high-tech enterprise specializing in R&D, manufacturing, and sales of relays. Our products are widely applied in smart home systems, photovoltaic new energy, charging piles, smart meters, industrial control, and other fields.
Currently, we have a professional team of nearly 500 employees and operate 30 fully automated production lines, with 40% of our products exported to over 20 countries worldwide. To better serve our customers and meet market demands, we continuously improve our products and manufacturing technologies, investing 6%-8% of annual sales revenue in R&D and innovation.
With a strong emphasis on technological innovation, we have been recognized as a National High-Tech Enterprise and Provincial R&D Center, holding more than 40 national patents. Our products have obtained international certifications, including ISO9001、ISO14001 and ISO45001, as well as authoritative UL、TUV and CQC certifications, fully complying with EU ROHS/REACH directives. 
Maintaining a 98% delivery satisfaction rate, our products serve global industry leaders such as Huawei, Bull, and Eaton in smart home, industrial control, new energy, and power meter applications. Looking ahead, Fanhar Electronics will continue expanding production capacity and deepening our presence in the new energy market, striving to become a provider in the relay industry. We offer Smart Meter Relay for sale.

Certificate Of Honor
  • ZL 2018 2 0494989.X A connection structure between a push card and a moving spring in a relay
  • ZL 2018 2 1136911.7 Low heat generation and long life electromagnetic relay armature structure
  • ZL 2018 2 1246154.9 Electromagnetic relay armature rotation structure
  • ZL 2018 2 1264750.X Electromagnetic relay terminal structure
  • ZL 2019 2 0010814.1 A snap-on magnetic latching relay electromagnetic system
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Electric Latching Relay Industry Knowledge

How Does a Latching Relay Achieve Status Memory and Energy Saving via Permanent Magnets?

The Mechanism of Zero-Power Consumption Maintenance

A Latching Relay is an energy-saving controller that utilizes permanent magnets for state switching and retention. In the context of global industrial decarbonization, Zhejiang Fanhar Electronics Co., Ltd. leverages its Provincial R&D Center's expertise to apply this "zero-power maintenance" technology across smart meters and smart home systems.

Unlike traditional relays that require continuous power to maintain an "on" state, a magnetic latching relay operates on a bi-stable structure:

  • Pulse Drive: The relay only requires an electrical pulse (typically tens of milliseconds) at the moment of state switching (from OFF to ON, or vice versa).
  • Permanent Magnet Memory: High-performance permanent magnets are embedded within the internal structure. Once the drive pulse disappears, the magnetic force is sufficient to overcome spring tension and lock the armature in its current position.
  • Zero-Power Retention: Once the state is locked, the coil no longer requires current. This means that for 99% of its operating time, the relay's power consumption is zero, significantly reducing system heat and extending the lifespan of battery-powered devices.

Technical Parameter Comparison: Monostable vs. Fanhar Latching Series

Based on experimental data from Zhejiang Fanhar Electronics Co., Ltd., the following table illustrates the core advantages of magnetic latching technology in practical applications:

Performance Metrics Traditional Monostable Relay Fanhar Latching Relay Series
Holding Power 0.4W - 1.2W (Continuous) 0W (Zero Consumption)
Temperature Rise Significant (Coil Heating) Extremely Low (Contact Resistance Only)
Status Memory None (Resets on Power Loss) Yes (Retains State on Power Loss)
Magnetic Interference Resistance Standard Strong (Optimized Magnetic Circuit)
Short-time Withstand Current Standard High (Suited for 100A/120A Applications)
Drive Method Continuous Level Control Narrow Pulse Control

Industry Knowledge FAQ

What are the competitive advantages of Zhejiang Fanhar Electronics Co., Ltd. in the smart meter sector?

Smart meters demand extreme reliability. With 30 fully automated production lines and nearly 500 professionals, we ensure the stability of our electric latching relay under high-current switching. As a national high-tech enterprise, our products serve industry leaders like Huawei, Bull, and Eaton. With a 98% delivery satisfaction rate, our patented magnetic circuit designs provide a robust security barrier, particularly against external magnetic interference.

How does Zhejiang Fanhar Electronics Co., Ltd. ensure compliance with international market access?

40% of Zhejiang Fanhar Electronics Co., Ltd. products are exported to over 20 countries. We hold ISO9001, ISO14001, and ISO45001 certifications, and our products have obtained authoritative UL, TUV, and CQC certifications. Furthermore, all products fully comply with EU ROHS/REACH directives, meeting the stringent environmental and safety requirements of global customers.

Why is choosing Zhejiang Fanhar Electronics Co., Ltd. a wise investment for the new energy market?

We invest 6%-8% of our annual sales revenue into R&D and innovation, holding over 40 national patents. In the photovoltaic and charging pile markets, the energy-saving features of latching relays are critical. As we continue to expand production capacity, we are dedicated to deepening our presence in the new energy market, utilizing automated manufacturing to enhance consistency and help customers achieve more efficient energy management.

How Can Electric Latching Relays Prevent Illegal Electricity Theft in Strong Magnetic Environments?

The Security Challenge in Smart Metering

In the smart meter industry, the magnetic interference resistance of an Electric Latching Relay directly impacts the security and revenue of the power grid. Zhejiang Fanhar Electronics Co., Ltd., a leading enterprise with a Provincial R&D Center and over 40 national patents, has developed specialized relay solutions to address the industry pain point of "illegal electricity theft."

Core Anti-Theft Technologies of Electric Latching Relays

In environments with strong external magnetic fields, standard relays are prone to abnormal armature movement due to magnetic interference, leading to unauthorized closing or tripping. Zhejiang Fanhar Electronics Co., Ltd. ensures security through the following technical paths:

  • Balanced Torque Magnetic Circuit Design: By precisely calculating the force balance point between the armature and the permanent magnet, it becomes extremely difficult for an external magnetic field to disrupt the internal stable state. This "torque balance" technology requires high-precision molds and assembly, guaranteed by our 30 fully automated production lines.
  • High-Coercivity Permanent Magnet Materials: We select permanent magnet materials with exceptional resistance to demagnetization. This ensures that even under a strong magnetic attack, the internal magnetic flux remains stable, preventing action failure caused by magnetic pole reversal.
  • High-Permeability Shielding Covers: To meet the needs of specific high-end meters, we provide products equipped with custom shielding covers that effectively absorb and guide external magnetic field lines away from the core action area.

Technical Parameter Comparison: Standard Relay vs. Fanhar Anti-Theft Enhanced Series

The following data is based on internal laboratory comparative testing at Zhejiang Fanhar Electronics Co., Ltd.:

Technical Parameters Standard Latching Relay Fanhar Anti-Theft Enhanced Series
Static Magnetic Field Resistance 100mT - 200mT Up to 500mT and above
Alternating Magnetic Interference Weak; prone to misoperation Extremely Strong; meets latest safety standards
Contact Pressure Stability Affected by external fluctuations Stable; maintained above 0.6N - 0.8N
Housing Material Standard Flame Retardant PBT High-grade, High-insulation Engineering Plastic
Rated Load Current 60A / 80A Suited for 100A / 120A Smart Meters

Industry Knowledge FAQ

How does Zhejiang Fanhar Electronics Co., Ltd. address global power security standards?

40% of our products are exported to over 20 countries, serving industry giants like Huawei, Bull, and Eaton. Our electric latching relay units are not only UL, TUV, and CQC certified but also fully comply with EU ROHS/REACH directives. Combined with ISO9001, ISO14001, and ISO45001 certifications, we ensure every product excels in rigorous anti-theft testing worldwide.

Why is automated production at Zhejiang Fanhar Electronics Co., Ltd. critical for smart meter applications?

Smart meters demand near-perfect consistency. Zhejiang Fanhar Electronics Co., Ltd. operates 30 fully automated production lines with nearly 500 professional employees. Automation not only maintains our 98% delivery satisfaction rate but also ensures micron-level installation accuracy for anti-theft relay components, which is the physical foundation for resisting strong magnetic interference.

What technical reserves does Zhejiang Fanhar Electronics Co., Ltd. have for future new energy and smart grid needs?

As a National High-Tech Enterprise, we invest 6%-8% of our annual sales revenue into R&D. We are deepening our presence in the new energy and charging pile markets. Future latching relays will be even more compact with higher short-time withstand current capabilities. We strive to be a leading provider in the relay industry through continuous patent innovation.