NLQ4125/3P millisecond level switching uninterruptible dual power automatic transfer switch. Compact threephase transfer switch designed for fast, reliable switching between two power sources to maintain continuous power to critical equipment. Key benefits Millisecond level switching minimizes interruption when switching between primary and backup power, reducing downtime for connected equipment. Uninterruptible dual power automatic transfer function enables automatic selection and transfer between two power sources without manual intervention. Compact and lightweight design (0.9 kg) saves panel space and simplifies installation in control cabinets and distribution boxes. Broad voltage compatibility supports a wide range of threephase systems with rated voltage above 50 V and below 440 V. PC grade product type improves conversion rates and helps ensure consistent switching performance. Specifications Model: NLQ4125/3P Size: 3P50A (three poles, 50 A size) Available current ratings: 100 A, 80 A, 63 A (threephase options) Rated voltage range: greater than 50 V and less than 440 V Function: Uninterruptible dual power automatic transfer switch with millisecond level switching Unit weight: 0.9 kg Product type: PC grade for improved conversion rates Category: Switches Features and what makes it stand out Fast automatic transfer: switches between two power sources in milliseconds to reduce the risk of load interruption. Threephase compatibility: works with threephase power systems and is suitable for a range of voltage and current configurations listed in specifications. Multiple current options: available in 100 A, 80 A, 63 A to match different load requirements while the 3P50A size identifies physical and connection format. Space efficient: low weight and compact dimensions make it suitable for retrofits and panel designs where space is limited. Simple integration: designed for straightforward mounting and wiring into existing control and distribution systems. Practical use scenarios Industrial control panels: maintain continuous operation of motors, controllers, and automation equipment by automatically switching to backup power when the main supply fails. Commercial buildings: ensure uninterrupted power to lighting circuits, elevators, and building management systems during power source transitions. Telecom and network infrastructure: provide fast, automatic transfer between utility power and generator or UPS feeds to keep critical communications equipment running. Installation and compatibility notes Intended for threephase systems within the specified voltage range above 50 V and below 440 V. Select the appropriate current rating (100 A, 80 A, 63 A) to match load demand and panel protection settings. Verify physical size 3P50A and mounting requirements against panel space prior to installation. This transfer switch provides millisecond switching performance, multiple current options, and compact form factor for reliable uninterruptible dual power switching in threephase applications.