HFD3-4.5-SR Signal Sub Mini SMD Relay - 4.5VDC 2A

The HFD3-4.5-SR is a compact subminiature sealed signal relay designed for surface-mount (SMD) applications requiring reliable switching performance, high sensitivity, and long-term stability. Built with a sealed housing and gold flash bifurcated contacts, it provides excellent signal integrity, low contact resistance, and consistent performance in low-level switching circuits.

Operating from a 4.5VDC coil, this relay supports a maximum switching current of 2A and is designed for precision signal control in densely populated PCB layouts. Its surge withstand capability up to 2500VAC enhances durability and ensures reliable operation in electrically noisy environments. The relay supports both SMT and DIP design compatibility, offering flexibility in manufacturing and integration.

This model is widely used in communication systems, industrial control modules, and compact electronic devices where space efficiency and dependable switching are essential.

Features

Subminiature sealed signal relay for SMD mounting

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

Gold flash bifurcated contacts for stable low-level signal switching

Surface-mount (SMD) package for automated PCB assembly

High surge withstand voltage up to 2500VAC

Meets FCC Part 68 and Telecordia standards

Complies with EN60950 and EN41003 safety requirements

Suitable for both SMT and DIP production variants

Stable, reliable switching performance in compact systems

Designed for high-density PCB layouts

Specifications

Model: HFD3-4.5-SR

Device Type: Signal Sub Mini Sealed Relay

Mounting Type: Surface Mount (SMD)

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

Coil Voltage: 4.5VDC

Coil Resistance: 145

Max Switching Current: 2A

Electrical Ratings:

2A at 30VDC

0.5A at 125VAC

4A at 220VDC / 277VAC (max)

Contact Material: Gold Flash Contacts

Surge Withstand Voltage: 2500VAC

Construction: Sealed subminiature relay

Applications

Communication and telecom equipment

Industrial control systems

Signal routing and switching circuits

Compact embedded electronic modules

Instrumentation and measurement devices

Low-power automation systems

High-density PCB assemblies

What's in the box
1 x HFD3-4.5-SR Signal Sub Mini SMD Relay - 4.5VDC 2A