HFD4-4.5-L Signal Subminiature Sealed Latching Relay 4.5VDC DPDT PCB Mount

The HFD4-4.5-L is a compact subminiature sealed latching relay designed for efficient, low-power switching in control and signal applications. Featuring a Form 2C (DPDT / 2c/o) contact configuration, it enables reliable switching of two independent circuits while maintaining a small PCB footprint.

This version uses a single-coil latching mechanism, meaning the relay retains its last switched state without continuous coil power. This makes it ideal for power-sensitive or battery-operated systems, where energy efficiency is critical.

The relay operates at a 4.5VDC coil voltage with a 203 coil resistance, delivering stable switching performance with a maximum switching current of 2A. Its latching design significantly reduces power consumption compared to standard non-latching relays.

Equipped with gold flash contacts, the HFD4-4.5-L provides excellent conductivity, low contact resistance, and long-term signal stability. It supports electrical loads of 2A at 30VDC and 0.5A at 125VAC (250VAC max), making it suitable for both DC and AC switching applications.

Features

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

Single-coil latching operation (no continuous coil power required)

4.5VDC low-voltage coil design

203 coil resistance

Maximum switching current of 2A

Gold flash contacts for reliable signal integrity

Compact sealed subminiature construction

Suitable for AC and DC switching applications

Specifications

Model: HFD4-4.5-L

Brand: Hongfa

Device Type: Subminiature Sealed Latching Relay

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

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

Battery-powered control systems

Energy-efficient embedded electronics

Industrial automation circuits

Signal switching and control logic

Memory-state switching applications

The HFD4-4.5-L combines low-power latching operation, compact sealed construction, and reliable signal switching, making it ideal for efficient modern electronic designs where power retention is important.

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