HFD4-3-SR Signal Subminiature Mini Sealed Surface-Mount Relay 3VDC DPDT PCB

The HFD4-3-SR is a compact subminiature sealed surface-mount relay designed for reliable signal switching in space-constrained electronic applications. Featuring a Form 2C (DPDT / 2c/o) contact configuration, it enables independent control of two circuits, making it suitable for a wide range of low-power control and signal routing applications.

This relay operates with a 3VDC coil and a 64.3 coil resistance, delivering efficient low-voltage operation while maintaining a maximum switching current of 2A. Its design prioritizes compactness and efficiency, making it ideal for high-density PCB assemblies.

Equipped with gold flash contacts, the relay ensures excellent conductivity, low contact resistance, and stable long-term performance for sensitive signal applications. It supports electrical ratings of 2A at 30VDC and 0.5A at 125VAC (250VAC max), enabling flexibility across both DC and AC switching requirements.

The sealed SMD construction provides enhanced protection against dust and contamination while supporting automated PCB assembly processes. This makes it well-suited for modern electronic manufacturing and compact device integration.

Features

Form 2C (DPDT / 2c/o) signal relay

Compact sealed surface-mount (SMD) design

3VDC coil operation with 64.3 resistance

Maximum switching current of 2A

Gold flash contacts for reliable signal integrity

Supports AC and DC switching applications

Sealed housing for improved durability and protection

Optimized for high-density PCB layouts

Specifications

Model: HFD4-3-SR

Brand: Hongfa

Device Type: Subminiature Sealed SMD Relay

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

Termination: SMD

Coil Rated Voltage: 3VDC

Coil Resistance: 64.3

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 signal switching

Industrial control systems

Embedded electronic modules

Communication devices

Low-voltage automation circuits

The HFD4-3-SR offers a strong combination of miniature SMD packaging, sealed durability, and efficient low-voltage switching, making it ideal for modern compact electronic designs.

What's in the box
1 x HFD4-3-SR Signal Subminiature Mini Sealed Surface-Mount (SMD) Relay 3VDC DPDT PCB Mount