The Hongfa HFD3/3-S(257) is a miniature signal relay designed for a wide array of applications requiring reliable switching performance in a compact form factor. This relay is part of the HFD3 series, known for its small size and high sensitivity, making it suitable for densely populated circuit boards and low-power applications.

Applications

• Telecommunications Equipment: Used in telephone exchanges and communication systems for signal routing.
• Measurement and Control Systems: Implemented in instruments and controllers where precise and reliable switching is crucial.
• Security Systems: Employed in alarm systems and access control devices for dependable operation.
• Medical Equipment: Found in various medical devices requiring compact and reliable relay solutions.
• Consumer Electronics: Used in appliances and other consumer goods for switching functions.

Features

• Miniature Size: Compact dimensions allow for high-density mounting on PCBs.
• High Sensitivity: Requires low coil power for activation, making it suitable for low-power circuits.
• High Contact Reliability: Ensures consistent and dependable switching performance.
• Long Life: Designed for extended operational lifespan, reducing the need for frequent replacements.
• Sealed Construction: Provides protection against dust and other environmental contaminants.

Benefits

• Space Saving: Its small size allows for more components to be placed on a circuit board, reducing overall product size.
• Energy Efficient: Low coil power consumption contributes to energy savings in the application.
• Reliable Performance: High contact reliability ensures consistent and dependable switching, improving system performance.
• Extended Lifespan: Long operational life reduces maintenance requirements and lowers total cost of ownership.
• Environmental Protection: Sealed construction protects the relay from environmental factors, enhancing reliability and lifespan.

Additional Details

The HFD3/3-S(257) typically features a single-pole double-throw (SPDT) contact configuration. The coil voltage is usually low, such as 3VDC, to accommodate low-power circuits. Contact ratings vary, but they are generally suitable for switching low to medium current and voltage levels. The relay is designed for through-hole mounting on PCBs. This relay is compliant with RoHS environmental standards.