HF49FD-012-1H11G Miniature Power Relay 12VDC SPST-NO 5A PCB SIL Relay

The HF49FD-012-1H11G relay from Hongfa is a compact miniature power relay designed for reliable PCB switching in industrial automation systems, embedded electronics, instrumentation, and appliance control applications. Featuring a Form 1A (SPST-NO) contact configuration, this relay provides dependable normally open switching for low to medium power loads.

This model operates with a 12VDC coil rated at 1.2k and consumes approximately 180mW of coil power, offering energy-efficient performance for low-power control circuits and microcontroller-driven systems. Its compact vertical package with SIL pin layout makes it ideal for high-density PCB designs where board space is limited.

The HF49FD-012-1H11G supports switching loads up to 5A at 250VAC or 30VDC, making it suitable for appliance controls, signal isolation, lighting systems, interface circuits, small motors, and industrial control modules. Gold-plated AgNi contacts improve conductivity, reduce contact resistance, and enhance performance in low-level signal switching applications.

With a 3kV isolation voltage between coil and contacts, the relay provides strong electrical insulation and reliable operation in mixed-voltage systems. The Class A insulation system and UL, CUL, and TUV approvals ensure compliance with international safety and reliability standards.

Features

Miniature PCB power relay

Form 1A (SPST-NO) contact configuration

12VDC coil with 1.2k resistance

Low coil power consumption (~180mW)

5A switching capacity at 250VAC / 30VDC

Gold-plated contacts for improved conductivity

SIL pin layout for compact PCB integration

3kV coil-to-contact isolation

Class A insulation system

UL / CUL / TUV approved

Compact vertical PCB mounting design

Specifications

Model: HF49FD-012-1H11G

Brand: Hongfa

Device Type: Miniature Power Relay

Contact Form: Form 1A (SPST-NO)

Coil Rated Voltage: 12VDC

Coil Resistance: 1.2k

Coil Power: 180mW

Maximum Switching Current: 5A

Electrical Rating: 5A at 250VAC / 30VDC

Contact Material: AgNi with Gold Plated Contacts

Isolation Voltage: 3kV

Insulation Class: A

Termination Type: PCB Through-Hole

Pin Layout: SIL

Dimensions: 20 × 5 × 12.4mm

Number of Pins: 4 Pins

Number of Poles: 1 Pole

Approvals: UL / CUL / TUV

Ideal for PLC interface modules, industrial control systems, appliance electronics, telecommunications equipment, embedded systems, signal switching circuits, and compact PCB applications requiring reliable low-power relay switching with enhanced gold-contact performance.

What's in the box
1 x HF49FD-012-1H11G Miniature Power Relay 12VDC SPST-NO 5A PCB SIL Relay