HFD4-5 Subminiature Signal Relay 5VDC DPDT PCB Mount

The HFD4-5 is a compact subminiature signal relay designed for reliable switching in PCB-based electronic systems. It features a Form 2C (DPDT / 2c/o) contact configuration, allowing two independent circuits to be controlled simultaneously, making it suitable for a wide range of signal and control applications.

This relay operates with a 5VDC coil and a 178 coil resistance, providing efficient low-voltage operation with a maximum switching current of 2A. Its 140mW coil power consumption supports energy-efficient designs while maintaining stable switching performance.

With a compact 10 × 6.5 × 5.4mm footprint, the HFD4-5 is optimized for high-density PCB layouts where space efficiency is important. Despite its small size, it delivers robust electrical performance with an isolation voltage of 1KV, ensuring safe and stable operation in sensitive circuits.

The relay uses AgNi + Au plated contacts, providing low contact resistance, good conductivity, and improved durability for long-term reliability in signal switching applications.

Features

Form 2C (DPDT / 2c/o) contact configuration

Compact subminiature PCB relay design

5VDC coil operation

178 coil resistance with 140mW power consumption

Maximum switching current of 2A

AgNi + Au plated contacts for reliable performance

1KV isolation voltage for circuit protection

Through-hole PCB mounting (DIL format)

Specifications

Model: HFD4-5

Brand: Hongfa

Device Type: Subminiature Signal Relay

Contact Form: Form 2C (DPDT / 2c/o)

Termination: PCB / DIL

Size: 10 × 6.5 × 5.4mm

Coil Rated Voltage: 5VDC

Coil Resistance: 178

Coil Power Consumption: 140mW

Maximum Switching Current: 2A

Electrical Rating: 2A at 30VDC

Isolation Voltage: 1KV

Contact Material: AgNi + Au plated

Number of Pins: 8 Pins

AC/DC Voltage: DC

Applications

PCB control systems

Industrial automation circuits

Signal routing and switching

Embedded electronics

Low-voltage control applications

The HFD4-5 provides a strong balance of compact size, reliable switching, and efficient low-power operation, making it a dependable choice for modern electronic designs.

What's in the box
1 x HFD4-5 Subminiature Signal Relay 5VDC DPDT PCB Mount