HONGFA Power Relay HF115F

Name: HONGFA Power Relay HF115F
Brand: HONGFA
SKU: HF115F
Availability: InStock

Series: HF115F

A versatile and highly popular subminiature power relay with a 16A switching capability. Known for its reliability and cost-effectiveness in high-volume applications.

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FAE Application Insights & Analysis

The HF115F is our go-to recommendation for designers needing a robust, "fit and forget" power relay without a high price tag. Its key advantage is the use of high CTI 250V grade plastic material, which provides enhanced safety and tracking resistance, making it suitable for appliances sold globally, especially in Europe.

While it's rated for 16A, we've seen it perform exceptionally well when driving moderately inductive loads like small motors and compressors, provided proper snubber circuits are in place. For new smart home designs, its compact size and low coil power consumption (approx. 400mW) make it easy to integrate into space-constrained PCBs and manage thermal performance.

Recommended Mating/Alternative Parts:

Mating Socket: Not typically socketed, direct PCB mount.
Alternative Series: For 20A applications, consider upgrading to the HONGFA HF152F series. For a smaller footprint, review the HF46F series.

Key Technical Parameters

Contact Rating	16A at 250VAC / 16A at 30VDC
Coil Voltage	5V, 12V, 24V DC (most common)
Contact Form	1H (SPST-NO), 1D (SPST-NC), 1Z (SPDT)
Dielectric Strength	4000VAC between coil and contacts
Operating Temperature	-40°C to +85°C
Electrical Life	100,000 operations at rated load
Mounting	PCB mount through-hole

Frequently Asked Questions (FAQ)

What is the difference between the 1Z, 1H, and 1D contact forms?

1Z is SPDT (Single Pole Double Throw), 1H is SPST-NO (Single Pole Single Throw - Normally Open), and 1D is SPST-NC (Single Pole Single Throw - Normally Closed). Choose based on whether you need to switch between two circuits or simply turn one on or off.

Can this relay handle LED loads?

Yes, the HF115F handles LED loads very well due to its low contact resistance and minimal voltage drop. It's ideal for LED lighting control applications.

What protection circuits do you recommend?

For inductive loads, always use a flyback diode across the coil. For AC loads, consider an RC snubber circuit across the contacts to reduce arcing and extend contact life.