HONGFA HFD31/5

Mfr. Part

HFD31/5

Manufacturer

HONGFA

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Detailed Description

Compact HONGFA HFD3x-family signal relay, 5 V coil variant, widely used for low-level signal switching and isolation in communications and control systems. Note: Some listings place this item under Specialized ICs; functionally it is an electromechanical signal relay. Use the datasheet on this page to confirm contact form, pin style, and exact dimensions for your specific build.

Key Features

5 V nominal coil for easy logic-level drive

Small footprint for high-density PCBs

High isolation between coil and contacts for clean signals

Low coil power and fast operate/release in the series

Multiple contact forms exist in the series; verify your exact sub-variant

Through-hole and SMD versions exist in the broader HFD3 family

Key Advantages

Proven HONGFA relay reliability and long life

Stable contact performance for low-level signals

Cost-effective versus many telecom-grade relays

Broad ecosystem and easy sourcing via Y-IC

Packaging

Type: Electromechanical signal relay; manufacturer package/case code 607 per listing

Housing material: Molded plastic body; copper alloy leads; Ag-based contact system used in the series

Size: Subminiature relay format; see datasheet for exact L x W x H for HFD31/5

Pin configuration: PCB pin layout typical of telecom/signal relays; SMD gull-wing options exist in the family; verify pin count and footprint in the datasheet

Thermal characteristics: Typical operating ambient range in the series is -40 to +85°C; coil temperature rise depends on drive and duty cycle; follow manufacturer derating curves

Electrical properties: 5 V nominal coil; coil resistance and power vary by sub-variant; contact rating typically signal-level (for example up to 1 A at 30 VDC in the family); dielectric strength coil-to-contact typically in the kV range; confirm exact ratings in the datasheet

Shipment format: Tape-and-reel for SMD versions; tube or tray for through-hole; moisture handling per manufacturer guidance

Lifecycle

Status: In active distribution; current stock shows date code 2021+

Not indicated as near end-of-life at this time; check with us for the latest status

Potential equivalents or alternatives depending on your exact electrical, mechanical, and safety needs

- HONGFA HFD3 series variants with 5 V coil and the same contact form

- HONGFA HFD2 or HFD4 series as size or form alternatives

- Omron G6A or G6H series 5 V signal relays

- Panasonic TQ series 5 V signal relays

- TE Connectivity Axicom IM series 5 V signal relays

If you need a drop-in replacement or cannot find a direct match, contact our Y-IC sales team via our website for a detailed cross-reference and engineering support.

Key Application Areas

Telecom and networking equipment and line cards

Modems, routers, and signal routing modules

Test and measurement instruments

Industrial control, PLC I/O, and field devices

Security systems and alarm panels

Medical and lab electronics for low-level signal switching

IoT gateways, smart meters, and home automation hubs

Datasheet

Our website hosts the most authoritative datasheet for HFD31/5. Download it on this page to confirm dimensions, pinout, coil resistance, contact form, ratings, and certifications before design-in.

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In stock quantity 16171 with date code 2021+. Get a Quote on our website now. Limited Time Offer for volume pricing and fast delivery. Learn More and send your BOM today to lock in the best terms.