HFD3-12-L1 Signal Submini Sealed 1-Coil Latching Relay 12VDC DPDT

The HFD3-12-L1 relay from Hongfa is a subminiature sealed signal relay featuring a 1-coil latching mechanism with a Form 2C (DPDT) contact configuration. It is designed for compact, high-reliability switching applications where the relay must retain its state after a brief control pulse, reducing continuous power consumption.

This model operates with a 12VDC coil and a coil resistance of 1440 . Unlike dual-coil latching types, this single-coil latching design uses polarity or pulse-based drive control to set and reset the relay state, making it suitable for space- and cost-sensitive control systems.

The HFD3-12-L1 supports a maximum switching current of 2A at 30VDC and 0.5A at 125VAC, making it suitable for signal-level and light power load switching. Gold flash contacts ensure stable, low-resistance switching performance, improving signal integrity and long-term reliability in sensitive electronic circuits.

Its sealed subminiature construction provides protection against dust and environmental contamination, while the compact footprint enables efficient PCB layout integration in dense electronic assemblies.

Features

1-coil latching DPDT (Form 2C) signal relay

12VDC pulse/polarity-driven operation

Ultra-low holding power (no continuous coil consumption)

Compact sealed subminiature PCB design

Gold flash contacts for reliable signal switching

Single-coil latching architecture (simplified drive)

High surge withstand capability (up to 2500VAC)

Meets EN60950 / EN41003 safety standards

Suitable for SMT and DIP variants

Designed for high-density electronic systems

Specifications

Model: HFD3-12-L1

Brand: Hongfa

Device Type: Signal Submini Sealed Relay

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

Coil Rated Voltage: 12VDC

Coil Resistance: 1440

Coil Type: 1-coil latching

Max Switching Current: 2A

Electrical Ratings:

2A at 30VDC

0.5A at 125VAC

Contact Material: Gold Flash

Relay Type: Signal submini sealed latching relay

Mounting Type: PCB (DIP / SMT variants available)

Typical Applications

Industrial automation systems

Telecommunications equipment

Energy-saving control circuits

Remote switching modules

Signal routing applications

Memory/state retention circuits

Embedded control boards

Low-power electronic systems

The HFD3-12-L1 is a compact, efficient single-coil latching DPDT relay designed for reliable state retention, low power operation, and stable signal switching in modern electronic applications.

What's in the box
1 x HFD3-12-L1 Signal Submini Sealed 1-Coil Latching Relay 12VDC DPDT