HFD4-4.5 Subminiature Signal Relay 4.5VDC DPDT PCB Mount

The HFD4-4.5 is a compact subminiature signal relay designed for reliable switching in space-constrained electronic and control applications. It features a Form 2C (DPDT / 2c/o) contact configuration, allowing independent switching of two circuits with high reliability and stable electrical performance.

This relay operates with a 4.5VDC coil and a 145 coil resistance, delivering efficient low-voltage operation while maintaining a maximum switching current of 2A. Its 140mW coil power consumption makes it suitable for energy-efficient designs and low-power control systems.

With a compact 10 × 6.5 × 5.4mm footprint, the HFD4-4.5 is optimized for dense PCB layouts where space is limited but performance is critical. The relay supports 2A at 30VDC electrical rating, making it suitable for a wide range of DC switching applications.

It uses AgNi + Au plated contacts, ensuring excellent conductivity, reduced contact resistance, and improved durability for long-term signal reliability. A 1KV isolation voltage provides additional safety and stability in sensitive electronic circuits.

Features

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

Compact subminiature PCB relay design

4.5VDC low-voltage coil operation

145 coil resistance with 140mW power consumption

Maximum switching current of 2A

AgNi + Au plated contacts for reliable performance

1KV isolation voltage for improved circuit safety

Through-hole DIL PCB mounting

Specifications

Model: HFD4-4.5

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: 4.5VDC

Coil Resistance: 145

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

Compact PCB control systems

Industrial automation modules

Signal routing circuits

Embedded electronics

Low-voltage switching applications

The HFD4-4.5 delivers a strong balance of compact size, efficient low-voltage operation, and reliable switching performance, making it a dependable choice for modern electronic designs.

What's in the box
1 x HFD4-4.5 Subminiature Signal Relay 4.5VDC DPDT PCB Mount