{"product_id":"5a-overcurrent-protection-relay-board-digital-display","title":"5A Overcurrent Protection Relay Board | Digital Display 5V\/12V","description":"\n\u003ch2\u003e5A Overcurrent Protection Relay Board with Digital Tube Display\u003c\/h2\u003e\n\u003cp\u003eMonitor and protect your AC-powered equipment with this compact, easy-to-configure \u003cstrong\u003e5A Overcurrent Protection Relay Board\u003c\/strong\u003e. Designed for makers, electricians, and DIY electronics enthusiasts, this module accurately measures AC current in real time and automatically triggers relay cutoff when a user-defined threshold is exceeded — keeping your devices and circuits safe from overload conditions.\u003c\/p\u003e\n\u003cp\u003eWith its bright nixie\/digital tube display, key-based threshold setting, and power-down memory, this relay board is ideal for dormitory power management, workshop equipment protection, and custom automation projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Power Supply Options:\u003c\/strong\u003e Operates on DC 5V or DC 7–12V — flexible for a wide range of setups\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReal-Time AC Current Measurement:\u003c\/strong\u003e Measures AC 0.01–6A with ±0.05A precision, displayed to two decimal places\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Overcurrent Threshold:\u003c\/strong\u003e Set your trip point anywhere from 0.01A to 5A via onboard keys\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelay Output:\u003c\/strong\u003e Supports AC 220V \/ 10A switching; includes 1 set of normally open + normally closed contacts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e50Hz\/60Hz Compatible:\u003c\/strong\u003e Works with standard AC mains frequencies worldwide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital Tube Display:\u003c\/strong\u003e Clear, real-time current readout for instant monitoring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower-Down Memory:\u003c\/strong\u003e Saves your threshold settings even when power is removed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Equipment protection, current monitoring, dormitory circuit management, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V or DC 7–12V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Switching Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 220V, 10A max\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Frequency Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50Hz \/ 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 0.01A – 6A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Precision\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.05A (2 decimal places)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOvercurrent Trip Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.01A – 5A (user-adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Contacts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1× Normally Open + 1× Normally Closed\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNixie \/ Digital Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSettings Memory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePower-down save (non-volatile)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× 5A Overcurrent Protection Relay Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Slight color variations may occur due to lighting and screen differences. Please allow 1–10mm measurement tolerance due to manual measurement.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on electrical safety standards and circuit protection best practices, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Resource\u003c\/a\u003e. Additional technical guidance for electronic component safety can be found at the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What power supply does the overcurrent protection relay board require?\u003c\/h4\u003e\n\u003cp\u003eA: The relay board supports two power supply options: DC 5V or DC 7–12V. Choose the option that matches your project or installation setup. The relay output itself can switch loads up to AC 220V \/ 10A.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I set the overcurrent trip threshold on this relay board?\u003c\/h4\u003e\n\u003cp\u003eA: The threshold is set using the onboard keys. You can configure the overcurrent trip point anywhere between 0.01A and 5A. The digital tube display shows the current setting in real time, and the power-down save feature ensures your configuration is retained even after a power cycle.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of applications is this relay board best suited for?\u003c\/h4\u003e\n\u003cp\u003eA: This 5A overcurrent protection relay board is well-suited for AC current monitoring, DIY electronics projects, dormitory circuit management, workshop equipment protection, and any application where automatic cutoff based on adjustable current thresholds is needed. It is compatible with 50Hz and 60Hz AC systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the relay board retain settings when power is disconnected?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The board features non-volatile power-down memory, meaning all your configured settings — including the overcurrent threshold — are saved automatically and restored the next time power is applied.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What power supply does the overcurrent protection relay board require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The relay board supports two power supply options: DC 5V or DC 7–12V. Choose the option that matches your project or installation setup. 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The board features non-volatile power-down memory, meaning all your configured settings — including the overcurrent threshold — are saved automatically and restored the next time power is applied.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Fasteners \u0026 Electrical\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/fasteners-electrical\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"5A Overcurrent Protection Relay Board | Digital Display 5V\/12V\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/5a-overcurrent-protection-relay-board-digital-display\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"12V","offer_id":48749794951360,"sku":"14:350850#12V","price":39.99,"currency_code":"USD","in_stock":true},{"title":"5V","offer_id":48749794984128,"sku":"14:350686#5V","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/S773f07f4e7aa417991d4b88271986642O.webp?v=1786208874","url":"https:\/\/vueselect.com\/products\/5a-overcurrent-protection-relay-board-digital-display","provider":"Vue","version":"1.0","type":"link"}