The HFD2/012-M-D(257) is a polarized latching signal relay manufactured by HongFa. This type of relay is designed to maintain its contact position even after the coil voltage is removed, making it ideal for applications where low power consumption and memory retention are crucial.

Applications

• Telecommunications Equipment: Used in telephone exchanges, line cards, and other telecom applications.
• Metering Systems: Employed in smart meters for remote control and data logging.
• Battery-Powered Devices: Suitable for devices where energy efficiency is paramount, such as portable instruments.
• Security Systems: Used in alarm systems and access control systems.
• Medical Equipment: Utilized in certain medical devices where low power consumption is necessary.

Features

• Polarized Latching: Maintains contact position without continuous coil power.
• Low Power Consumption: Requires minimal power to change state.
• Compact Size: Small form factor for high-density mounting.
• High Sensitivity: Requires low coil power for activation.
• RoHS Compliant: Meets environmental standards for hazardous substances.

Benefits

• Energy Saving: Latching function reduces power consumption significantly.
• Memory Retention: Maintains contact position even without power.
• Space Efficiency: Compact size allows for efficient use of PCB space.
• Reliable Switching: Provides dependable switching performance.
• Environmental Compliance: RoHS compliant, ensuring environmental responsibility.

Additional Details

The HFD2/012-M-D(257) relay operates with a 12VDC coil voltage. The M indicates a monostable configuration, and D may indicate a specific terminal or coil characteristic. The (257) likely refers to a specific production batch or internal manufacturing code. This relay typically has a low contact current rating, suitable for signal-level switching. For precise specifications, including coil resistance, contact ratings, and mechanical dimensions, refer to the official HongFa datasheet. The polarized latching design ensures that the relay remains in its last switched state, even in the event of a power interruption. These relays are typically used in through-hole mounting applications.