HFD4-3-L Signal Sub Mini Sealed Relay 3VDC DPDT PCB Mount

The HFD4-3-L is a compact and reliable subminiature sealed relay engineered for precision signal switching and low-power control applications. Featuring a Form 2C (DPDT / 2c/o) contact configuration, this relay provides dependable dual-circuit switching in compact electronic designs where space and performance are critical.

Designed with a 3VDC coil, the relay delivers efficient low-voltage operation while supporting a maximum switching current of 2A. Its sealed construction protects internal components from dust and environmental contamination, ensuring long-term reliability and stable operation in demanding applications.

The relay utilizes Silver Nickel / Gold Plated contacts, offering excellent conductivity, low contact resistance, and improved durability for sensitive signal and control switching. It supports electrical loads of 2A at 30VDC and 0.5A at 125VAC (250VAC max), making it suitable for both DC and AC switching applications.

With its compact footprint and dependable performance, the HFD4-3-L is ideal for PCB-mounted electronic systems, industrial controls, communication equipment, and embedded devices requiring reliable miniature relay switching.

Features

• Form 2C (DPDT / 2c/o) contact configuration
• Compact mini sealed relay design
• 3VDC low-voltage coil operation
• Maximum switching current of 2A
• Silver Nickel / Gold plated contacts for enhanced reliability
• Sealed housing for protection against contamination
• Supports both AC and DC switching applications
• Suitable for compact PCB installations

Specifications

• Model: HFD4-3-L
• Brand: Hongfa
• Device Type: Mini Sealed Relay
• Contact Form: 2 Form C (DPDT / 2c/o)
• Coil Rated Voltage: 3VDC
• Coil Resistance: 90
• Maximum Switching Current: 2A
• Electrical Rating:2A at 30VDC
  0.5A at 125VAC
  250VAC Max
  
• Contact Material: Silver Nickel / Gold Plated
• AC/DC Voltage: DC

Applications

• PCB signal and control switching
• Embedded electronic systems
• Industrial automation equipment
• Communication and telecom devices
• Low-power control and interface circuits

The HFD4-3-L combines compact size, sealed reliability, and efficient low-voltage switching, making it an excellent solution for modern electronic and industrial relay applications.

What's in the box
1 x HFD4-3-L Signal Sub Mini Sealed Relay 3VDC DPDT PCB Mount