HFD3-4.5-L2SR Signal Sub Mini SMD 2-Coil Latching Relay - 4.5VDC 2A

The HFD3-4.5-L2SR is a subminiature signal relay designed for surface-mount (SMD) applications where compact size, reliable switching, and low power consumption are essential. Built with a sealed structure and gold flash bifurcated contacts, it ensures stable signal integrity, low contact resistance, and long service life even in demanding electronic environments.

This is a 2-coil latching relay, meaning separate set and reset coils allow the relay to retain its switched state without continuous power consumption. This makes it highly efficient for systems where power saving and state retention are critical. Operating at 4.5VDC with a 2A switching capacity, it is well-suited for precision signal control in compact PCB designs.

The relay is engineered for high reliability, offering surge withstand protection up to 2500VAC and compliance with key international standards such as FCC Part 68, EN60950, and EN41003. Its SMD construction supports automated PCB assembly and high-density circuit layouts.

Features

Subminiature sealed signal relay with SMD mounting

2-coil latching operation (set/reset control)

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

Gold flash bifurcated contacts for stable low-level switching

Surface-mount (SMD) design for automated assembly

High surge withstand voltage up to 2500VAC

Complies with FCC Part 68 and Telecordia standards

Meets EN60950 and EN41003 safety requirements

Low power latching operation (no continuous coil drive required)

High stability and long operational life

Suitable for compact and high-density PCB layouts

Specifications

Model: HFD3-4.5-L2SR

Device Type: Signal Sub Mini Sealed Relay

Relay Type: 2-Coil Latching (SMD)

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

Coil Voltage: 4.5VDC

Coil Resistance: 101 / 101

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

Mounting Type: Surface Mount Device (SMD)

Construction: Sealed subminiature relay

Applications

Telecom and communication equipment

Industrial control and automation systems

Signal routing and logic switching circuits

Battery-powered or low-power systems

High-density PCB designs

Instrumentation and measurement devices

Embedded control modules

What's in the box
1 x HFD3-4.5-L2SR Signal Sub Mini SMD 2-Coil Latching Relay - 4.5VDC 2A