The HFD31/5-L1 is a polarized latching signal relay manufactured by HongFa. This relay is similar to the HFD3 series but offers a lower profile, making it suitable for applications with height constraints. Its latching function allows it to maintain its contact position even when power is removed, making it ideal for battery-powered devices and memory retention applications.

Applications

• Battery-powered equipment
• Remote control systems
• Telecommunications equipment
• Automatic test equipment
• Security systems
• Applications where height is restricted

Features

• Polarized latching type
• Low profile design
• Low power consumption
• Contact form: 2 Form C (DPDT)
• Contact rating: 0.5A at 125VAC / 1A at 30VDC
• Coil voltage: 5VDC
• High sensitivity
• RoHS compliant

Benefits

• Low Power Consumption: Minimizes energy usage, extending battery life in portable devices.
• Latching Function: Retains contact position without continuous power, preserving state during power outages.
• Low Profile: Suitable for height-constrained applications.
• Reliable Switching: Provides consistent performance over a long operational life.
• Versatile Application: Suitable for a wide range of electronic devices and systems.

Additional Details

The HFD31/5-L1 relay operates on a 5VDC coil voltage and has a contact rating of 0.5A at 125VAC or 1A at 30VDC. The 2 Form C (DPDT) contact configuration offers flexibility in switching multiple circuits. The key difference from the HFD3 series is its reduced height. The insulation resistance is typically 100MΩ minimum at 500VDC. Dielectric strength is 750VAC between coil and contacts and 500VAC between open contacts. The operating temperature range is typically -40°C to +85°C. The latching characteristic is achieved through a polarized design, requiring correct polarity for proper operation. It is typically mounted on PCBs using through-hole soldering.