{"product_id":"5v-bistable-flip-flop-latch-relay-module-self-locking-switch","title":"5V Bistable Flip-Flop Latch Relay Module – Self-Locking Switch","description":"\n\u003ch2\u003e5V Bistable Flip-Flop Latch Relay Module — Self-Locking Switch Board (3-Pack)\u003c\/h2\u003e\n\u003cp\u003eTake control of your Arduino projects, smart home setups, LED lighting, and motor circuits with this compact \u003cstrong\u003e5V Bistable (Self-Locking) Flip-Flop Latch Relay Module\u003c\/strong\u003e. This 3-piece set delivers a reliable, ultra-low standby power solution for any maker, hobbyist, or electronics engineer who needs a toggle-style relay that \u003cem\u003eholds its state without continuous power draw\u003c\/em\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Makes It Bistable?\u003c\/h3\u003e\n\u003cp\u003eUnlike standard relays that require a constant signal to stay engaged, this bistable (self-locking) design remembers its last state. One low pulse trigger pulls the relay in — and it stays latched. A second pulse releases it — and it stays released. No signal, no wasted power. Just clean, reliable switching.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Voltage:\u003c\/strong\u003e DC 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Current:\u003c\/strong\u003e 70 mA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandby Current:\u003c\/strong\u003e Only 1 µA (ultra-low power)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Capacity:\u003c\/strong\u003e AC 250V \/ 10A  |  DC 30V \/ 10A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrigger Mode:\u003c\/strong\u003e Low Pulse Trigger\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 35mm × 16mm × 18.5mm (L × W × H) — Miniature footprint\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 13.5 g per module\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 3× 1-Channel DC 5V Self-Locking Relay Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eModule Interface Pins\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVCC\u003c\/strong\u003e — Positive power supply\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e — Negative power supply (ground)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eT\u003c\/strong\u003e — Low pulse trigger input\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelay Output Terminals\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNO\u003c\/strong\u003e — Normally Open relay interface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCOM\u003c\/strong\u003e — Common relay interface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNC\u003c\/strong\u003e — Normally Closed relay interface\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eBy default, the relay starts in the released (open) state. Press the trigger once → relay latches ON. Press again → relay releases OFF. Press a third time → relay latches ON again. This toggle behavior repeats indefinitely with each low pulse trigger signal, making it perfect for hands-free or single-button control.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino \u0026amp; MCU development boards\u003c\/li\u003e\n  \u003cli\u003eSmart home automation systems\u003c\/li\u003e\n  \u003cli\u003eLED lighting control\u003c\/li\u003e\n  \u003cli\u003eDC motor switching\u003c\/li\u003e\n  \u003cli\u003eAutomotive electronics\u003c\/li\u003e\n  \u003cli\u003eEmergency lighting systems\u003c\/li\u003e\n  \u003cli\u003eToy cars and remote-controlled vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\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\" or \"self-locking\" mean for this relay module?\u003c\/h4\u003e\n\u003cp\u003eA: A bistable relay module holds its switched state without needing a continuous signal. One low pulse trigger causes the relay to latch into the ON position and stay there; a second pulse switches it to the OFF position and holds it there. This makes it ideal for low-power applications where you don't want continuous current drawn just to maintain a relay state.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this 5V bistable relay module compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The module operates at DC 5V, which is natively compatible with Arduino boards. It can also be used with Raspberry Pi and other 3.3V microcontrollers by using a small level-shifting circuit, since the trigger input accepts low pulse signals. It is widely used in smart home, LED, motor, and MCU projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What load can this relay module switch?\u003c\/h4\u003e\n\u003cp\u003eA: Each relay module supports up to AC 250V \/ 10A for AC loads and DC 30V \/ 10A for DC loads, making it suitable for controlling lights, small motors, and other general-purpose electrical loads — all from a compact 35mm × 16mm board.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many modules are included in one purchase?\u003c\/h4\u003e\n\u003cp\u003eA: Each purchase includes \u003cstrong\u003e3 × 1-Channel DC 5V Self-Locking Bistable Relay Modules\u003c\/strong\u003e, giving you excellent value for prototyping or multi-circuit projects.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does \\\"bistable\\\" or \\\"self-locking\\\" mean for this relay module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A bistable relay module holds its switched state without needing a continuous signal. One low pulse trigger causes the relay to latch into the ON position and stay there; a second pulse switches it to the OFF position and holds it there. This makes it ideal for low-power applications where you don't want continuous current drawn just to maintain a relay state.\"}}, {\"@type\": \"Question\", \"name\": \"Is this 5V bistable relay module compatible with Arduino and Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The module operates at DC 5V, which is natively compatible with Arduino boards. It can also be used with Raspberry Pi and other 3.3V microcontrollers by using a small level-shifting circuit, since the trigger input accepts low pulse signals. 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