HFD4-4.5-LSR Signal Subminiature Sealed Surface-Mount Latching Relay 4.5VDC

The HFD4-4.5-LSR is a compact subminiature sealed surface-mount (SMD) latching relay designed for high-efficiency, space-saving electronic applications. Featuring a Form 2C (DPDT / 2c/o) contact configuration, it enables independent control of two circuits while maintaining a very small footprint suitable for dense PCB layouts.

This relay uses a single-coil latching mechanism, allowing it to retain its switched state without continuous coil power. This significantly reduces power consumption, making it ideal for battery-powered systems, low-energy control circuits, and memory-state switching applications.

It operates with a 4.5VDC coil voltage and a 203 coil resistance, providing stable actuation while supporting a maximum switching current of 2A. The latching behavior ensures energy-efficient operation compared to standard non-latching relays.

The gold flash contacts provide excellent conductivity, low contact resistance, and long-term switching reliability, supporting loads of 2A at 30VDC and 0.5A at 125VAC (250VAC max). This makes it suitable for both AC and DC control applications in compact electronic systems.

The SMD sealed construction enhances durability by protecting internal components from dust and contamination while enabling automated assembly processes for modern PCB manufacturing.

Features

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

Single-coil latching operation (no continuous power required)

Compact sealed surface-mount (SMD) design

4.5VDC coil with 203 resistance

Maximum switching current of 2A

Gold flash contacts for high reliability

Low power consumption latching mechanism

Suitable for automated PCB assembly

Specifications

Model: HFD4-4.5-LSR

Brand: Hongfa

Device Type: Subminiature Sealed SMD Latching Relay

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

Termination: SMD

Coil Rated Voltage: 4.5VDC

Coil Resistance: 203

Coil Type: Single-Coil Latching

Maximum Switching Current: 2A

Electrical Rating:

2A at 30VDC

0.5A at 125VAC

250VAC Max

Contact Material: Gold Flash Contacts

AC/DC Voltage: DC

Applications

Compact PCB automation systems

Battery-powered electronics

Smart control modules

Industrial embedded systems

Signal routing and switching circuits

The HFD4-4.5-LSR combines low-power latching operation, sealed SMD packaging, and reliable gold contact performance, making it well-suited for modern high-density electronic designs.

What's in the box
1 x HFD4-4.5-LSR Signal Subminiature Sealed Surface-Mount (SMD) Latching Relay 4.5VDC DPDT