SEOUL, South Korea, Nov. 11, 2026 /PRNewswire/ — JOAM INNOTECH Co., Ltd. (CEO Byung-hyun Lee), a Korean company specializing in electrical safety, has announced that it has developed a printed circuit board (PCB) module that combines overvoltage, overcurrent and earth-leakage protection in a single unit. The company now plans to use this technology to expand into the global electrical safety market.
JOAM INNOTECH develops and manufactures PCBs for earth-leakage circuit breakers. Drawing on its experience in mass-producing overcurrent protection PCBs, the company is focused on advancing electrical safety technology. Its latest development, an integrated protection module that combines overvoltage, instantaneous overcurrent and earth-leakage detection on a single PCB, strengthens its product competitiveness.
The new module is designed to detect abnormal conditions in the power system, such as sustained high voltage, overcurrent or earth leakage, and trigger the breaker’s trip mechanism in response. Unlike conventional protection methods that only suppress momentary voltage surges, the module has enhanced overvoltage detection that lets it respond when abnormally high voltage is supplied continuously.
Another key advantage is that the module works with existing compact earth-leakage circuit breaker designs. It was designed around standard PCB dimensions, mounting methods and trip coil connections, so manufacturers can add it without external protection devices or major mechanical redesigns. Circuit breaker and power strip manufacturers can expand protection features and set their products apart while keeping their existing product designs.
JOAM INNOTECH is taking a phased approach to development and commercialization. The company has been mass-producing and supplying overcurrent protection PCBs since late 2024, building up its manufacturing capabilities. In April 2026, it filed a Korean patent application for its overvoltage protection technology, and in May it built prototypes of the integrated protection module and ran initial performance tests. Next, the company plans to run application tests in finished products, verify reliability and set mass-production inspection standards to prepare for commercialization.
“We developed this integrated protection PCB module to add overvoltage protection while keeping the structural advantages of existing compact earth-leakage circuit breakers,” said a JOAM INNOTECH spokesperson. “We will keep advancing the technology and verifying its reliability to strengthen our competitiveness, and we aim to create new business opportunities in the global electrical safety market as well as in Korea.”
JOAM INNOTECH CO., LTD
John B. H. Lee
[email protected]
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