The HFD4/5 is a polarized latching signal relay manufactured by HongFa. This relay is designed for high-density mounting and low power consumption. The HFD4 series typically offers smaller dimensions than the HFD3 series, making it suitable for applications where board space is at a premium. Its latching function ensures the contact position is maintained even without continuous power supply.

Applications

• Telecommunications equipment
• Automatic test equipment
• Security systems
• Battery-powered devices
• High-density PCB applications

Features

• Polarized latching type
• Miniature size for high-density mounting
• 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: Extends battery life in portable devices by minimizing energy usage.
• Latching Function: Preserves the relay's state during power interruptions.
• Compact Size: Enables efficient use of board space in miniaturized devices.
• Reliable Performance: Delivers consistent switching performance.
• Versatile Applications: Suitable for a range of low-power control systems.

Additional Details

The HFD4/5 relay features a 5VDC coil voltage and a contact rating of 0.5A at 125VAC or 1A at 30VDC. The 2 Form C (DPDT) contact arrangement enables switching of two separate circuits. Its compact size makes it ideal for densely populated circuit boards. Insulation resistance is typically 100MΩ minimum at 500VDC. Dielectric strength between coil and contacts is typically 750VAC, and 500VAC between open contacts. The operating temperature range is typically -40°C to +85°C. The polarized latching design means the relay requires the correct polarity to switch and maintain its state without continuous power. This relay is typically mounted on PCBs through-hole.