FH56L Electric Latching Relay
Views: 911  Author: Fanhar Relay  Time: 2025.07.28

In modern electrical control systems, the stability, durability and response speed of relays directly affect the operational efficiency of the equipment.FH56L is a high-performance bistable relay designed for high-current and high-reliability application scenarios by Zhejiang Panhai Electronics Co. and is widely used in industrial automation, rail transportation, New energy and communication equipments, etc.


Core Advantages


Powerful load capacity to adapt to severe working conditions

125A high current switching capacity, support up to 80VDC voltage, suitable for high-power load control.

10,000VA switching capacity to meet the needs of industrial equipment, electric vehicles and other high-energy applications.

AgSnO(silver tin oxide) contact material, arc resistance, anti-oxidation, to ensure long-term stability of conduction, contact resistance 2mΩ, reduce energy loss.


Energy saving and environmental protection, reduce system power consumption

Bistable (magnetic retention) structure, only 50ms~200ms pulse excitation can switch state, no need for continuous power supply, greatly reducing energy consumption.

RoHS compliant, lead-free design, suitable for green energy and demanding industrial environments.


Fast response, high mechanical life

Action/reset time 30ms, suitable for automation control systems requiring high-speed switching.

Mechanical life up to 100,000 times, stable electrical life, suitable for frequent operation of industrial scenarios.


Excellent environmental adaptability

Suitable for harsh environment conditions, operating from -25to 60.

Ideal for construction machinery and rail transit due to high vibration resistance (60-100bps/min, acceleration 4g).

Stable functioning in humid conditions with moisture-proof design (humidity 20%~90%).


Technical specifications



Coil Specifications


 


Typical Application Scenarios


Industrial Automation

Suitable for PLC control system, motor drive, high power switching equipment.

Provide stable and reliable current switching in CNC machines, injection moulding machines, packaging machines and other equipment.


Railway & Electric Vehicle

Used for battery management system (BMS) and charging control of trains, trams and electric vehicles.

High vibration-resistant design to adapt to the vibration environment in vehicle operation.


New Energy & Energy Storage Systems

For photovoltaic inverters, wind power control systems, energy storage battery pack management.

Low power consumption design to improve energy efficiency.


Communication and Power Equipment

Power management for base stations, UPS uninterruptible power supply, switching control for power distribution cabinets.

High reliability to ensure long-term stable operation of communication equipment.


Use and Installation Guide


Installation Precautions

Contact status check: Transportation may cause contact status change, manual reset to desired status (normally open or normally closed) is required before use.

Avoid Strong Magnetic Field: The working environment should be far away from the magnetic field over 200mT to prevent malfunction.

PCB mounting: Design the circuit board in strict accordance with the dimension drawing (tolerance ±0.1mm) to ensure stable installation.


Electrical Drive Recommendations

Recommended drive voltage: 1~1.1 times of rated voltage (e.g. 12V~13.2V for 12V models).

Pulse control: Pulse width 50ms~200ms to avoid overheating of the coil due to long time energisation.

Prohibit simultaneous excitation: Do not supply power to the ONand OFFcoils at the same time to avoid damaging the relay.


Fanhar specialises in the development and manufacture of relays, and the FH56L is the preferred solution for industrial control applications due to its high reliability, energy efficiency, environmental friendliness and long life. Please feel free to contact us for technical advice or customised service!

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