The FH20 is a high-performance, reliable relay product specifically engineered for usage in new energy, photovoltaic (PV) systems, and electric vehicle (EV) chargers. It excels in electrical performance, mechanical strength, and environmental adaptability, complies with multiple international standards, and is suitable for industrial environments with stringent requirements for safety and efficiency.
It can handle continuous current switching up to 43A and a maximum switching voltage of 277VAC, which is plenty for most medium to high-power equipment.
Uses AgSnO₂ contact material, offering excellent arc resistance and electrical stability for extended electrical life.
IEC62109-2-2011 safety isolation criteria are met with a contact gap of ≥2.0mm, effectively decreasing arc risk.
Insulation system complies with UL Class F rating, featuring high insulation resistance (≥1000MΩ) and strong dielectric withstand capability (2500VAC between contacts, 4500VAC between coil and contacts).
Utilises low-voltage hold technology, enabling a decrease in coil voltage to sustain engagement post-activation, which markedly reduces the system's standby power consumption.
Provides various DC coil voltage selections such as 5V, 12V, and 24V to accommodate diverse control circuit configurations.
Operating temperature range: -40℃ to +85℃, suitable for outdoor and industrial environments with significant temperature variations.
Flux-proof or totally plastic Sealed construction resists dust, corrosive gases, and other pollutants.
Mechanical life: 200k rated load (43A/250VAC) operations ensure reliability.
Excellent shock and vibration resistance (10–55Hz, functional 20g, destructive 100g).
Electric Vehicle Charging Piles: Main circuit control, supports high-current frequent switching.
Photovoltaic Inverter Systems: DC or AC side switching, adaptable to outdoor high/low temperature environments.
Energy Storage Systems (ESS): The battery charge and discharge can be controlled, and it is highly durable from an electrical standpoint.
Industrial Power Equipment: This is appropriate for use in workshops where there are corrosive gases or particulate matter.
New Energy Grid-Connected Devices: Meets safety isolation requirements, ensures system safety.
The FH20T has passed multiple international safety and performance certifications, including:
UL Certification (File No. E475405)
TUV Certification (File No. R 50581364)
CQC Certification (File No. CQC23002383075)
Certifications cover multiple current ratings including 50A, 43A, and 40A, ensuring reliable operation even at 85℃ ambient temperature.
In pristine, pollution-free surroundings, the Flux Proofed type is advised for its effective heat dissipation and economic viability.
In environments containing H₂S, SO₂, NO₂, or dust, the Fully Plastic Sealed type is recommended to enhance long-term reliability.
During design, please refer to the Maximum Switching Power Curve and Endurance Curve provided in the specification sheet for proper derating to extend product life.
The FH20T relay, with its powerful load capacity, excellent environmental adaptability, and high reliability, is the preferred component for demanding power control applications. We provide complete technical support and sample services to assist you in achieving safer and more efficient system designs.
For further technical documentation, selection guides, or sample orders, please feel free to contact us.
