HFD42-3-3 Signal Subminiature Mini Sealed Relay 3VDC DPDT

The HFD42-3-3 is a compact subminiature sealed signal relay designed for reliable low-voltage switching in space-constrained electronic applications. It features a Form 2C (DPDT / 2c/o) contact configuration, enabling independent control of two circuits while maintaining a very small PCB footprint.

This relay operates with a 3VDC coil and a 64.3 coil resistance, making it suitable for higher coil drive current designs while still maintaining fast and reliable actuation. Its gold flash contacts provide excellent conductivity, low contact resistance, and long-term signal stability, ensuring dependable performance across repeated switching cycles.

It supports switching loads up to 1A at 30VDC and 0.5A at 125VAC (250VAC max), making it suitable for both AC and DC signal-level applications. The sealed construction protects internal components from dust and contamination, improving durability in industrial and embedded environments.

Features

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

3VDC coil for low-voltage control applications

64.3 coil resistance for strong actuation current

Gold flash contacts for stable, low-resistance switching

Supports 1A at 30VDC and 0.5A at 125VAC (250VAC Max)

Compact sealed design for improved environmental protection

Specifications

Model: HFD42-3-3

Brand: Hongfa

Device Type: Subminiature Sealed Relay

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

Coil Rated Voltage: 3VDC

Coil Resistance: 64.3

Electrical Rating:

1A at 30VDC

0.5A at 125VAC

250VAC Max

Contact Material: Gold Flash

AC/DC Voltage: DC

Applications

Low-voltage control and driver circuits

Embedded electronics and PCB signal switching

Industrial automation systems

Battery-powered and compact electronic devices

General-purpose signal routing applications

The HFD42-3-3 offers a strong balance of low-voltage operation, compact sealed construction, and reliable signal switching, making it well-suited for modern electronic control systems.

What's in the box
1 x HFD42-3-3 Signal Subminiature Mini Sealed Relay 3VDC DPDT