In the landscape of modern electrical engineering, the demand for higher current thresholds has shifted from heavy industrial sites to residential and commercial sectors. As a leading China Over-Under Voltage 100a manufacturer, Zhejiang Shuorui Electric Co., Ltd. recognizes that the 100A threshold represents the critical intersection of high-power availability and sensitive electronic safety. With the proliferation of EV charging stations, heat pumps, and solar energy storage systems, traditional 40A or 63A protectors often fall short of the headroom required for peak transient loads.
Our 100A series is engineered with precision MCU (Microcontroller Unit) architecture, offering millisecond-level reaction times to voltage spikes (Overvoltage) and sags (Undervoltage). Unlike mechanical relays of the past, our digital protection technology ensures zero-crossing switching, significantly extending the lifecycle of both the protector and the downstream connected equipment.
Designed to handle steady-state 100A loads with integrated heat dissipation, ideal for entire-home or industrial sub-panel protection.
Real-time visualization of current and voltage allows site managers to diagnose power quality issues before they lead to downtime.
Programmable delay timers prevent "hunting" effects where fluctuating power causes rapid on/off cycling, protecting motor-driven loads.
Zhejiang Shuorui Electric Co., Ltd. is located in Liushi, Wenzhou, the electrical capital of China. Our strategic location allows us to harness a world-class supply chain ecosystem, ensuring that every 100A protector we manufacture meets the highest global standards.
Our factory has transitioned toward China Factory 4.0 standards. By integrating automated SMT lines, ultrasonic welding, and computerized aging test stations, we eliminate human error from the assembly process. This focus on "Supply Chain Resilience" means we can maintain steady production even during global market volatility.
The evolution of 100A over-under voltage protection is moving toward the Internet of Electrical Things (IoET). Shuorui's R&D team is currently focusing on three key pillars for our 2025-2030 roadmap:
Our upcoming Gen-5 protectors will use machine learning to identify harmonic distortion patterns, predicting potential transformer failures before they manifest as voltage spikes.
As microgrids become standard, our protectors are evolving to handle bidirectional power flows, essential for homes with V2G (Vehicle-to-Grid) capabilities.
Using GaN (Gallium Nitride) components to reduce the footprint of high-current breakers, allowing 100A protection in standard 2-module DIN rail widths.
Product Reliability Rate
Exporting Countries
Certified Quality Mgmt
Technical Support
From raw material silver point inspection to final high-voltage endurance tests, our QC department is uncompromising.
From 1A to 100A, and DC 24V to 1500V, our product range covers every conceivable surge and voltage protection need.
We provide full-service customization for international brands, including custom trip curves and localized enclosure labeling.
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