{"product_id":"adjustable-over-under-voltage-protector-relay-dc-12v-24v-36v-48v","title":"Adjustable Over\/Under Voltage Protector Relay DC 12V–48V","description":"\n\u003ch2\u003eAdjustable Over\/Under Voltage Protector Relay — DC 12V \/ 24V \/ 36V \/ 48V\u003c\/h2\u003e\n\u003cp\u003eKeep your DC electrical systems safe and running smoothly with this compact, DIN rail-mounted voltage protector relay. Designed for real-time monitoring of both overvoltage and undervoltage conditions on direct current circuits, this solid-state relay device automatically disconnects the load when voltage drifts outside your preset thresholds — then reconnects once stable voltage is restored. Both the trip thresholds and the action delay time are fully user-adjustable, giving you precise control over how your system responds.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Works with DC 12V, DC 24V, DC 36V, and DC 48V circuits — ideal for solar, battery, and low-voltage industrial systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Overvoltage \u0026amp; Undervoltage Thresholds:\u003c\/strong\u003e Overvoltage adjustment range +8% to +42%; undervoltage adjustment range -17% to +17%.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Action Delay:\u003c\/strong\u003e Set the trip delay anywhere from 0.1 to 15 seconds to avoid nuisance tripping from momentary fluctuations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Auxiliary Power Required:\u003c\/strong\u003e Powers directly from the monitored circuit — no separate supply needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolid State Relay Technology:\u003c\/strong\u003e Fast, reliable switching with no mechanical wear on the sensing circuit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2 Sets of Output Contacts:\u003c\/strong\u003e Both normally open (NO) and normally closed (NC) contacts included for flexible wiring configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual LED Indicators:\u003c\/strong\u003e Two status LEDs clearly display current operating conditions at a glance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard DIN Rail Mount:\u003c\/strong\u003e Fits standard 35mm guide rails — integrates cleanly into existing enclosures and distribution boards.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Footprint:\u003c\/strong\u003e Slim 79 × 79 × 23 mm modular housing takes up minimal panel space.\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\u003eMonitoring Circuit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDirect Current (DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V \/ DC 24V \/ DC 36V \/ DC 48V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOvervoltage \u0026amp; Undervoltage\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOvervoltage Adjustment Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+8% to +42%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUndervoltage Adjustment Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-17% to +17%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAction Delay Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1 – 15 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6A \/ 250VAC (resistive load)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolid State Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e35mm DIN Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e79 × 79 × 23 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSolar panel and battery storage systems\u003c\/li\u003e\n  \u003cli\u003e12V \/ 24V \/ 48V DC power distribution panels\u003c\/li\u003e\n  \u003cli\u003eIndustrial control cabinets and automation enclosures\u003c\/li\u003e\n  \u003cli\u003eElectric vehicle charging and energy storage protection\u003c\/li\u003e\n  \u003cli\u003eTelecom and off-grid power equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Over\/Under Voltage Protector Relay\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to screen color calibration differences, the item's color may vary slightly from the images shown. Please allow ±1–3 cm measurement tolerance due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on electrical safety standards for low-voltage devices, refer to the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What DC voltage ratings does this voltage protector relay support?\u003c\/h4\u003e\n\u003cp\u003eA: This adjustable voltage protector relay is compatible with DC 12V, DC 24V, DC 36V, and DC 48V circuits. Make sure to select or configure the unit for the voltage level that matches your specific system before installation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I set both the overvoltage and undervoltage trip points independently?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The overvoltage threshold is independently adjustable from +8% to +42% above the rated voltage, while the undervoltage threshold can be set between -17% and +17% relative to the rated voltage. This gives you full, independent control over both protection limits.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this relay require a separate auxiliary power supply?\u003c\/h4\u003e\n\u003cp\u003eA: No auxiliary power supply is needed. The relay draws its operating power directly from the monitored DC circuit, simplifying installation and reducing wiring complexity.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the contact capacity of the output relay?\u003c\/h4\u003e\n\u003cp\u003eA: The output contacts are rated at 6A \/ 250VAC for resistive loads. There are 2 sets of contacts — one normally open (NO) and one normally closed (NC) — giving you flexibility for both energize-to-trip and de-energize-to-trip wiring schemes.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How is this voltage protector relay installed?\u003c\/h4\u003e\n\u003cp\u003eA: The device uses a standard 35mm DIN rail mounting system, making it straightforward to snap into most industrial enclosures, distribution boards, or control cabinets. Its compact 79 × 79 × 23 mm footprint minimizes the panel space required.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What DC voltage ratings does this voltage protector relay support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This adjustable voltage protector relay is compatible with DC 12V, DC 24V, DC 36V, and DC 48V circuits. Make sure to select or configure the unit for the voltage level that matches your specific system before installation.\"}}, {\"@type\": \"Question\", \"name\": \"Can I set both the overvoltage and undervoltage trip points independently?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The overvoltage threshold is independently adjustable from +8% to +42% above the rated voltage, while the undervoltage threshold can be set between -17% and +17% relative to the rated voltage. This gives you full, independent control over both protection limits.\"}}, {\"@type\": \"Question\", \"name\": \"Does this relay require a separate auxiliary power supply?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No auxiliary power supply is needed. 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