HFD31-3-SR Signal Submini SMD Relay 3VDC DPDT Compact Surface Mount Relay

The HFD31-3-SR relay from Hongfa is a compact subminiature surface-mount (SMD) signal relay designed for reliable low-power switching in modern electronic assemblies. Featuring a Form 2C (DPDT) contact configuration, this relay is ideal for signal routing, embedded systems, and high-density PCB applications where compact size and dependable performance are essential.

This model operates with a 3VDC coil and a coil resistance of 64.3 , delivering efficient operation with a low coil power consumption of only 140mW. The SMD package supports automated assembly processes and space-saving PCB layouts, making it well suited for compact electronic devices.

The HFD31-3-SR supports a maximum switching current of 1A and is rated for 1A at 30VDC and 0.5A at 125VAC. Gold flash contacts provide excellent conductivity and reliable low-level signal switching, ensuring long-term stability and reduced contact resistance in sensitive applications.

Its sealed construction helps protect internal components from dust and environmental contaminants, improving operational reliability and service life.

Features

• Compact SMD DPDT (Form 2C) signal relay
• 3VDC low-power coil operation
• Efficient 140mW power consumption
• Surface-mount design for automated PCB assembly
• Gold flash contacts for stable signal switching
• Sealed housing for improved reliability
• Compact footprint for dense PCB layouts
• Designed for low-current control applications
• Long electrical and mechanical lifespan
• Suitable for modern miniature electronic systems

Specifications

• Model: HFD31-3-SR
• Brand: Hongfa
• Device Type: Signal Submini SMD Relay
• Contact Form: Form 2C (DPDT / 2c/o)
• Termination Type: SMD
• Coil Rated Voltage: 3VDC
• Coil Resistance: 64.3
• Coil Power: 140mW
• Max Switching Current: 1A
• Electrical Ratings:1A at 30VDC
  0.5A at 125VAC
  
• Contact Material: Gold Flash Contacts
• Relay Type: Subminiature sealed signal relay

Typical Applications

• Surface-mount PCB assemblies
• Telecommunications equipment
• Embedded control systems
• Industrial automation electronics
• Signal routing circuits
• Smart electronic devices
• Audio and communication systems
• Compact low-power switching applications

The HFD31-3-SR is a reliable, low-power SMD DPDT relay designed for compact electronic systems requiring stable signal switching and efficient PCB integration.

What's in the box
1 x HFD31-3-SR Signal Submini SMD Relay 3VDC DPDT Compact Surface Mount Relay