The HFD31/3-L2SR(257) is a miniature signal relay manufactured by HongFa, designed for signal switching applications that require a specific low coil voltage. The 'L2SR' designation indicates particular features pertaining to coil sensitivity, contact material, and surge resistance. The (257) likely refers to a specific production batch or internal specification.

Applications

• Telecommunications equipment
• Instrumentation
• Medical devices
• Security systems
• Industrial control systems

Features

• Miniature size
• High sensitivity
• Low coil power consumption
• High switching capacity
• 3VDC coil voltage
• SPDT contact arrangement
• Sealed construction for environmental protection

Benefits

• Reduced PCB space requirements
• Energy efficient operation
• Reliable signal switching
• Long operational life
• Easy integration into existing designs
• Protection against dust and humidity

Additional Details

This relay features a 3VDC coil, making it suitable for low-voltage applications. The SPDT contact provides flexible switching options. The 'L2SR' designation, as specified in the datasheet, defines the precise coil sensitivity, contact material composition, and surge resistance characteristics. The relay's durable construction and sealed design ensure reliability in various operating environments. Refer to the datasheet for detailed electrical characteristics, including contact rating, coil resistance, insulation resistance, and operating temperature range, to guarantee proper application.