HF49FD-005-1H11G Miniature Power Relay 5VDC SPST-NO 5A PCB SIL Relay

The HF49FD-005-1H11G relay from Hongfa is a compact miniature power relay designed for reliable switching in PCB-based control systems, industrial automation, instrumentation, and electronic equipment. It features a Form 1A (SPST-NO) contact configuration, providing simple and efficient normally open switching for low to medium power loads.

This model operates with a 5VDC coil rated at 208 , delivering efficient actuation with low power consumption of approximately 180mW. Its design is optimized for compact PCB layouts, including SIL-style pin configuration, making it suitable for high-density board integration and space-constrained applications.

The HF49FD-005-1H11G supports switching loads up to 5A at 250VAC or 30VDC, making it suitable for controlling small motors, lighting circuits, power supplies, signal isolation stages, and general-purpose electronic switching tasks. Its gold-plated contacts improve low-level signal integrity, reduce contact resistance, and enhance long-term electrical stability in sensitive applications.

With 3kV isolation voltage between coil and contacts, the relay provides strong dielectric protection, ensuring safe operation in mixed-signal and industrial environments. The insulation class A rating and UL, CUL, and TUV approvals further reinforce its suitability for safety-critical and commercial-grade applications.

Features

Miniature PCB power relay

Form 1A (SPST-NO) contact configuration

5VDC coil with 208 resistance

Low coil power consumption (~180mW)

5A switching capacity at 250VAC / 30VDC

SIL pin layout for compact PCB design

Gold-plated contacts for improved signal reliability

3kV coil-to-contact isolation

UL / CUL / TUV approved

Compact 20 × 5 × 12.4mm footprint

Specifications

Model: HF49FD-005-1H11G

Brand: Hongfa

Device Type: Miniature Power Relay

Contact Form: Form 1A (SPST-NO)

Coil Rated Voltage: 5VDC

Coil Resistance: 208

Coil Power: 180mW

Maximum Switching Current: 5A

Electrical Rating: 5A at 250VAC / 30VDC

Contact Material: AgNi (Gold plated contacts)

Termination Type: PCB (SIL layout)

Isolation Voltage: 3kV

Insulation Class: A

Approvals: UL / CUL / TUV

Typical Applications

Industrial control systems

PLC interface modules

Signal switching and isolation

Small appliance control boards

Instrumentation and test equipment

Embedded electronic systems

Low-power load switching circuits

This relay is ideal when you need compact PCB switching with improved contact quality (gold-plated interface) and reliable performance in both industrial and commercial electronic designs.

What's in the box
1 x HF49FD-005-1H11G Miniature Power Relay 5VDC SPST-NO 5A PCB SIL Relay