FH62NE New Energy Relay｜40A 4-Pole Main Contacts + Safety Monitoring Auxiliary Contact, Designed for PV Inverters and EV Charging Stations

As photovoltaic systems, EV charging stations, and industrial control equipment place ever-higher demands on electrical safety and energy efficiency, relays must deliver not only reliable switching performance but also safety monitoring, low-power operation, and long-term stability. The FH62NE series new energy relay from Fanhar Electronics combines high load capacity, intelligent safety monitoring, energy-saving operation, and long-life design into one solution, offering a highly reliable power switching solution for applications with stringent requirements for electrical performance, system safety, and environmental adaptability.

4 Sets of 40A Main Contacts + 1 Auxiliary Contact – High Current Carrying and Safety Monitoring in One

The FH62NE features 4 sets of 40A main contacts and 1 auxiliary contact:

Main contacts: 4 Form A (4A/4AB) normally open contacts, using AgSnO₂ (silver tin oxide) material, rated at 40A @ 480VAC (resistive), maximum switching capacity 19,200 VA, initial contact resistance ≤10 mΩ.

Auxiliary contact: 1 Form B normally closed contact, using AgNi (silver nickel) material, rated at 1A @ 277VAC / 30VDC.

Core safety function: In the event of main contact welding due to a fault, the auxiliary contact can still open reliably with a minimum gap of ≥0.5 mm, sending a fault signal to the control system for real-time safety monitoring of the main circuit. This complies with IEC 61810-3 safety standard. The main contact gap is 3.9 mm, ensuring high-voltage isolation safety.

Class F High Insulation Design Meets High-Voltage Requirements for New Energy Applications

New energy equipment operates under high voltage for extended periods, demanding excellent insulation performance. The FH62NE adopts a Class F insulation system (155°C) with a creepage distance of >8 mm, effectively preventing high-voltage breakdown and leakage.

Dielectric strength capability:

Surge voltage: The relay withstands 10 kV (1.2/50 µs) surge voltage between coil and contacts. Initial insulation resistance is 1000 MΩ at 500 VDC.

Low-Power Design

The FH62NE uses a low-power coil design with a rated operating power of only 4.8W. After the switching action, the state can be maintained by applying a sustaining voltage as low as 40%–100% of rated voltage (at 25°C) or 50%–60% (at 85°C), significantly reducing long-term energy consumption and heat buildup.

Coil specifications (at 23°C):

Operate time: ≤40 ms; Release time: ≤20 ms.

Wide Temperature Range and High Reliability for Demanding Industrial Environments

The FH62NE features a fully sealed, dust- and splash-proof construction, operating reliably over a temperature range of –40°C to +85°C and humidity range of 5% to 85% RH, making it suitable for diverse climates and harsh industrial environments.

Endurance ratings:

• Mechanical life: 1,000,000 operations
• Electrical life: 30,000 operations (40A/480VAC resistive, ON/OFF = 1s/9s)

Vibration and shock resistance:

• Functional vibration: 10 Hz – 55 Hz, 1.5 mm amplitude
• Functional shock: 98 m/s² (10g)
• Destructive shock: 980 m/s² (100g)

Compact Size for Easy System Integration

The FH62NE measures 58 mm × 35 mm × 47 mm (L × W × H) and weighs approximately 200 g, making it easy to integrate into space-constrained enclosures.

Mounting and soldering recommendations:

Mounting: PCB mount recommended

Soldering temperature: 260°C ± 5°C

Soldering time: 3 – 5 seconds

Mounting dimension tolerance (unless noted): ±0.1 mm

Key Application Scenarios

With its high current carrying capability, independent safety monitoring, and proven design, the FH62NE is widely used in:

Solar photovoltaic inverters: For load switching and isolation on the DC input or AC output side. Its high voltage withstand, high current capacity, and surge immunity effectively handle voltage fluctuations and switching transients common in PV systems.

AC EV charging stations: As the core switching component in charging control circuits, the main contacts safely carry charging current, while the auxiliary contact provides an extra layer of safety protection.

Safety-critical systems requiring status feedback: The auxiliary contact delivers diagnostic information about the main contact status, meeting the needs of applications with stringent safety requirements.