{"product_id":"5v-bistable-latching-relay-dpdt-hfd2-005-s-l2-d-2a-30vdc","title":"5V Bistable Latching Relay DPDT 2A 30VDC – HFD2\/005-S-L2-D","description":"\n\u003ch2\u003e5V Coil Bistable Latching Relay – DPDT HFD2\/005-S-L2-D\u003c\/h2\u003e\n\u003cp\u003eThis compact \u003cstrong\u003e5V bistable latching relay\u003c\/strong\u003e (model HFD2\/005-S-L2-D) is an essential component for electronics projects, PCB designs, and automation circuits. With a DPDT (Double Pole Double Throw) configuration and a 10-pin layout, this relay holds its switched state without continuous coil power — making it ideal for low-power, energy-efficient applications. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e HFD2\/005-S-L2-D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoil Voltage:\u003c\/strong\u003e 5V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Form:\u003c\/strong\u003e 2CO (DPDT – Double Pole Double Throw)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Rating:\u003c\/strong\u003e 1A @ 125VAC \/ 2A @ 30VDC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Material:\u003c\/strong\u003e Ag-AuAg8 (Silver \/ Gold-Silver alloy)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoil Consumption:\u003c\/strong\u003e 150mW\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperate \/ Release Time:\u003c\/strong\u003e 4ms \/ 3ms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin Count:\u003c\/strong\u003e 10 Pins\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (approx.):\u003c\/strong\u003e 2 × 1 × 1 cm (0.79 × 0.39 × 0.39 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Load:\u003c\/strong\u003e Low Power\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEU LVD:\u003c\/strong\u003e Low Voltage – Below 50VAC or 75VDC\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose a Bistable Latching Relay?\u003c\/h3\u003e\n\u003cp\u003eUnlike standard relays, a \u003cstrong\u003ebistable (latching) relay\u003c\/strong\u003e maintains its last switched position even after coil power is removed. This means zero standby power consumption once set — perfect for battery-powered devices, smart home automation, remote switching circuits, and any application where power efficiency is critical.\u003c\/p\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HFD2\/005-S-L2-D Bistable Latching Relay\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePlease allow 0–3mm measurement tolerance due to manual measuring.\u003c\/li\u003e\n  \u003cli\u003eActual product color may vary slightly from screen images due to monitor differences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does \"bistable latching relay\" mean and how does the HFD2\/005 work?\u003c\/h4\u003e\n\u003cp\u003eA: A bistable latching relay has two stable positions — ON and OFF — and holds whichever state it was last set to, even when coil power is removed. The HFD2\/005-S-L2-D uses a 5V DC pulse to set or reset the relay position, consuming no ongoing power once switched. This makes it highly efficient for battery-operated and low-power circuit designs.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the contact rating of this relay?\u003c\/h4\u003e\n\u003cp\u003eA: This DPDT relay is rated at 1A @ 125VAC for AC circuits and 2A @ 30VDC for DC circuits. It is designed for low-power signal switching applications and should not be used to switch heavy loads beyond these ratings.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this relay compatible with standard PCB layouts?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The HFD2\/005-S-L2-D features a standard 10-pin through-hole configuration that is compatible with most PCB designs that support the HFD2 footprint. Always verify your PCB footprint and pin assignments against the relay's datasheet before soldering.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does \\\"bistable latching relay\\\" mean and how does the HFD2\/005 work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A bistable latching relay has two stable positions — ON and OFF — and holds whichever state it was last set to, even when coil power is removed. The HFD2\/005-S-L2-D uses a 5V DC pulse to set or reset the relay position, consuming no ongoing power once switched. 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