HFD16-2.4-ZH-3N Low Power Sub-Mini Sealed Relay 2.4VDC Ultra-Sensitive SPDT

The HFD16-2.4-ZH-3N relay from Hongfa is a sub-miniature sealed PCB relay designed for ultra-low power control applications where very sensitive coil operation and compact footprint are essential. It is widely used in portable electronics, instrumentation, telecom systems, battery-powered devices, and low-energy industrial control circuits.

This relay features a Form 1C (SPDT / changeover) contact configuration, enabling flexible switching between two circuit paths or use in logic and control applications. Its standout characteristic is its super-sensitive 2.4VDC coil with an extremely low 38.4 resistance and low power consumption (50-150mW depending on variant), allowing it to be driven directly from low-voltage logic or battery-powered control systems.

Despite its ultra-low coil power requirement, the relay maintains a switching capability of up to 3A at 250VAC / 30VDC, making it suitable for signal switching, small load control, and compact embedded systems. Its sealed construction enhances reliability by protecting internal contacts from dust, oxidation, and flux contamination during PCB assembly.

The 6-pin layout ensures straightforward integration into dense PCB designs where space efficiency and low power consumption are critical design constraints.

Features

Ultra-low power sub-mini sealed PCB relay

Form 1C (SPDT / changeover contact)

2.4VDC super-sensitive coil operation

Very low coil resistance (38.4 )

Low power consumption (approx. 50-150mW)

3A switching capacity at 250VAC / 30VDC

Compact 6-pin PCB design

Sealed construction for improved reliability

Ideal for low-voltage and battery-operated systems

Specifications

Model: HFD16-2.4-ZH-3N

Brand: Hongfa

Device Type: Low Power Sub-Mini Sealed Relay

Contact Form: Form 1C (SPDT)

Termination Type: PCB Mount

Coil Rated Voltage: 2.4VDC

AC/DC Voltage: DC

Coil Resistance: 38.4

Coil Power: ~50-150mW (variant dependent)

Electrical Rating: 3A at 250VAC / 30VDC

Pins: 6-pin configuration

Typical Applications

Battery-powered control systems

Portable electronic devices

Low-voltage sensor interfaces

Telecom and signal switching equipment

Embedded microcontroller systems

Compact instrumentation modules

This relay is optimized for designs where extremely low coil power and direct low-voltage drive capability are required, without sacrificing basic switching performance in compact PCB layouts.

What's in the box
1 x HFD16-2.4-ZH-3N Low Power Sub-Mini Sealed Relay 2.4VDC Ultra-Sensitive SPDT PCB Relay