HFD4-I-12 Signal Subminiature Sealed Monostable High Load Relay 12VDC PCB

The HFD4-I-12 is a subminiature sealed monostable high-load signal relay designed for applications requiring higher switching capability while maintaining a compact PCB footprint. It features a Form 2C (DPDT / 2c/o) contact configuration, enabling reliable control of two independent circuits in industrial and electronic systems.

Unlike standard low-power signal relays, this "I-series" variant is engineered for higher load handling, supporting a maximum switching current of 3A, making it suitable for more demanding switching applications while still maintaining signal-level precision.

The relay operates with a 12VDC coil and a 1028 coil resistance, providing efficient energization with low power consumption. Its monostable (non-latching) design ensures the relay returns to its default state when coil power is removed, making it ideal for safety-critical or momentary control applications.

It supports electrical loads of 3A at 30VDC and 1A at 125VAC (up to 250VAC / 220VDC max), offering flexibility for both DC and AC switching environments. The gold flash contacts ensure stable conductivity, low contact resistance, and improved long-term reliability.

Designed as a sealed subminiature PCB relay, it provides protection against environmental contaminants while maintaining a compact form factor suitable for dense electronic assemblies.

Features

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

Monostable (non-latching) operation

High-load capability up to 3A switching current

12VDC coil with 1028 resistance

Low power consumption design

Gold flash contacts for reliable signal integrity

Sealed subminiature construction

IEC 60335-1 compliance suitability

Specifications

Model: HFD4-I-12

Brand: Hongfa

Device Type: Subminiature Sealed High-Load Relay

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

Coil Rated Voltage: 12VDC

Coil Resistance: 1028

Operating Type: Monostable (non-latching)

Maximum Switching Current: 3A

Electrical Rating:

3A at 30VDC

1A at 125VAC

250VAC / 220VDC max

Contact Material: Gold Flash Contacts

AC/DC Voltage: DC

Applications

Industrial control systems

Home appliance control circuits

Power switching interfaces

Embedded control modules

Higher-load signal switching applications

The HFD4-I-12 bridges the gap between signal relays and higher-load switching, offering a compact yet more robust solution for applications requiring greater current handling without sacrificing PCB space or reliability.

What's in the box
1 x HFD4-I-12 Signal Subminiature Sealed Monostable High Load Relay 12VDC DPDT PCB Mount