E-T-A Elektrotechnische Apparate GmbH (often marketed as E-T-A Engineering Technology) is a German global market leader in overcurrent protection, circuit breakers, and power distribution systems.

Founded in 1948 and headquartered in Altdorf, Germany, the company specializes in designing and manufacturing high-performance thermal, thermal-magnetic, magnetic, and electronic circuit protection devices. E-T-A’s components are engineered to safeguard critical electrical equipment and human life across demanding industries, including aerospace, defense, industrial automation, telecommunications, medical technology, oil & gas, and transportation.