The FH37 relay is a high-reliability control component built primarily for severe industrial situations. It integrates a high switching capacity of up to 15A, flexible contact configurations, a robust mechanical structure, and convenient installation features. The product incorporates a flux-proof design and comes with a transparent dust cover, supports multiple installation modes, and is compatible with various relay sockets. It seeks to provide a reliable, long-lasting, and readily maintainable load control solution for industrial automation systems. This specification provides a comprehensive overview of its technical characteristics and performance parameters to support your selection and application.
The main strength of the FH37 relay lies in its outstanding electrical and mechanical performance. It has a switching capability of up to 15A, accommodating loads of 250VAC and 30VDC, with a maximum switching capacity of 3750VA (450W). The relay contacts consist of AgSnO₂ (Silver Tin Oxide), providing superior conductivity and extended durability.
The design emphasises convenience and reliability for industrial applications. The flux-proof design safeguards internal components from contamination during soldering, while the transparent dust cover facilitates straightforward visual assessment of the relay condition. With compact dimensions of 27.3 × 21.0 × 35.0 mm and a PCB insertion mounting style, it is suitable for high-density layouts. Its modular design further simplifies installation and maintenance.
Contact Configurations: Available in forms such as 1A, 1B, 1C, etc.
Initial Contact Resistance: ≤ 100mΩ (measured at 6VDC, 1A).
Rated Load: 15A @ 250VAC / 30VDC (resistive load).
Maximum Switching Voltage: 250VAC / 30VDC.
Maximum Switching Current: 15A.
Insulation Resistance: ≥ 1000MΩ (at 500VDC).
Between open contacts: 1000VAC for 1 minute.
Between coil and contacts: 1500VAC for 1 minute.
Switching Speed: Operate time ≤ 25ms, Release time ≤ 25ms.
Electrical Life: 100,000 operations at rated resistive load (15A, 250VAC/30VDC), with an ON/OFF cycle of 1s/9s at room temperature.
Mechanical Life: Up to 10,000,000 operations.
Shock Resistance:
Functional: 98 m/s² (10g).
Destructive: 980 m/s² (100g).
Vibration Resistance: 10Hz–55Hz, 1.5mm DA.
Operating Temperature: -40℃ to +70℃.
Operating Humidity: 5% to 85% RH (non-condensing).
Terminal Type: PCB insertion style.
Weight: Approx. 37 grams.
Construction: Flux-proof sealed design.
For detailed mounting hole positions and layout dimensions, please refer to the product drawings (reference index: [38, 113, 925, 346]).
Tolerance Notes:
Outline dimension tolerances:
≤ 1mm: ±0.2mm
1mm and <5mm: ±0.3mm
≥5mm: ±0.5mm
PCB layout tolerances (unless specified): ±0.1mm
The FH37 series relay stands as a reliable foundation for industrial control applications, thanks to its high switching capacity, exceptional mechanical and electrical longevity, strong environmental resilience, and user-centered installation design. It not only meets the rigorous demands of reliable operation in tough environments but also enhances system maintainability through its transparent and modular architecture. When you choose the FH37, you're getting a fundamental part for your control system that will last and be stable.
