Siemens Smart Infrastructure has expanded its portfolio of industrial control and protection technologies with new developments aimed at improving electrical safety, operational reliability and sustainability in industrial environments.
The company has enhanced the capabilities of its semiconductor-based circuit protection technology while also introducing a refurbished soft starter developed under circular economy principles. The announcements reflect a broader push by Siemens to combine advanced electrical engineering with environmentally responsible manufacturing.
Central to the update is the continued development of the SENTRON Electronic Circuit Protection Device (ECPD), which was first launched in 2024. The device uses semiconductor technology to perform electronic switching far faster than traditional protection systems, helping to reduce short-circuit energy and safeguard connected equipment.
The ECPD can deliver switching speeds up to 1,000 times faster than conventional solutions. It also integrates more than ten configurable functions into a single unit, allowing operators to significantly reduce the space required within distribution boards while enabling software-based configuration.
Siemens plans to expand the product range with a single-phase version that will include integrated residual current monitoring. This function enables continuous supervision of electrical circuits to detect faults at an early stage without disrupting operations. Such monitoring is particularly relevant for facilities that require high levels of reliability, including data centres, exhibition venues and lighting installations, where uninterrupted power supply is essential.
A three-phase version of the ECPD is also under development to address higher-voltage systems operating at 400V and 32A. This model is expected to support a wider range of infrastructure and industrial applications, including conveyor systems, elevators, heat pumps, air conditioning installations and event power distribution networks.
According to Andreas Matthé, the company’s use of semiconductor technology is reshaping industry expectations for circuit protection by delivering faster response times, compact designs and improved system uptime.
Alongside the circuit protection developments, Siemens has also introduced its first refurbished soft starter designed according to circular economy principles. The SIRIUS 3RW5 -Z R11 refurbished soft starter is created through a controlled refurbishment process in which used devices are thoroughly tested, key components replaced and performance validated to meet the same standards as new equipment.
This remanufacturing process typically reduces carbon emissions by as much as 50% compared with producing a new device, primarily due to lower resource consumption. Environmental Product Declarations document the environmental benefits and ensure transparency.
The refurbished soft starter retains full compatibility with new units in terms of installation, parameterisation and functionality, enabling straightforward integration into existing systems. The product also incorporates traceability features such as a QR-based ID Link, allowing lifecycle monitoring across both its initial and refurbished service phases.
Siemens is showcasing the technology at the Light + Building 2026 in Frankfurt, where the company is highlighting how digitalisation and circular design can work together to support more sustainable industrial operations.
Siemens unveils advanced circuit protection and circular soft starter
