April 15, 2026
Warszawa, Poland
SENTRON 3QD2 semiconductor circuit breaker
Rising energy costs, pressure to improve efficiency, and the dynamic development of renewable sources are driving industry to take a closer look at direct current (DC) technologies. Siemens is responding to these needs by expanding its portfolio of DC solutions for industry and infrastructure. New products introduced by Siemens Smart Infrastructure are designed to help companies reduce operating costs, increase installation reliability, and achieve energy transition goals.
DC is back in the game and gaining new relevance
(illustration)Direct current is not a new concept, and an increasing number of key technologies - from photovoltaic installations to energy storage systems - operate based on DC. Eliminating unnecessary energy conversions means lower losses, higher efficiency, and more effective use of available resources.This is becoming increasingly important also in Poland, where industry and infrastructure are facing growing demand for stable and predictable power supply. Advances in semiconductor technologies now make it possible to combine energy efficiency with a high level of safety and system resilience.
Microseconds that make the difference
A key innovation in the new portfolio is the SENTRON 3QD2 semiconductor circuit breaker. Based on semiconductor technology and smart protection algorithms, it enables ultra-fast interruption of short circuits in the microsecond range, up to 1,000 times faster than conventional systems.
One of the key elements of the new portfolio is the SENTRON 3QD2 semiconductor circuit breaker. The device enables ultra-fast short-circuit interruption - in microseconds, up to 1,000 times faster than traditional solutions. This directly translates into reduced risk of damage, downtime, and costly failures. Importantly, SENTRON 3QD2 integrates protection, switching, and energy monitoring functions in a single device, simplifying the installation architecture.
Less power, fewer materials, lower costs
(illustration)The portfolio is complemented by SIRIUS 3RF5 semiconductor contactors and relays - a solution designed specifically for direct current applications. Thanks to their semiconductor design, these devices perform well in environments requiring frequent load switching, reducing mechanical wear and increasing the service life of the installation.
SIRIUS 3RF5 solid-state switching device
From a business perspective, DC technologies mean not only higher efficiency but also tangible savings. In industrial applications, peak power demand can be reduced by up to 80 percent, which directly impacts energy costs.Simplifying infrastructure also results in lower consumption of raw materials - including copper, by up to half. This is an important argument not only economically, but also environmentally.
A system, not individual devices
(illustration)The new Siemens solutions have been designed as part of a broader ecosystem. They can be integrated with low-voltage switchgear or busbar trunking systems, creating a coherent energy management environment in modern installations.
Siemens will present the expanded DC technology portfolio at Hannover Messe 2026.
Link to Press Release
Warszawa, Poland
SENTRON 3QD2 semiconductor circuit breaker
Rising energy costs, pressure to improve efficiency, and the dynamic development of renewable sources are driving industry to take a closer look at direct current (DC) technologies. Siemens is responding to these needs by expanding its portfolio of DC solutions for industry and infrastructure. New products introduced by Siemens Smart Infrastructure are designed to help companies reduce operating costs, increase installation reliability, and achieve energy transition goals.
DC is back in the game and gaining new relevance
(illustration)Direct current is not a new concept, and an increasing number of key technologies - from photovoltaic installations to energy storage systems - operate based on DC. Eliminating unnecessary energy conversions means lower losses, higher efficiency, and more effective use of available resources.This is becoming increasingly important also in Poland, where industry and infrastructure are facing growing demand for stable and predictable power supply. Advances in semiconductor technologies now make it possible to combine energy efficiency with a high level of safety and system resilience.
Microseconds that make the difference
A key innovation in the new portfolio is the SENTRON 3QD2 semiconductor circuit breaker. Based on semiconductor technology and smart protection algorithms, it enables ultra-fast interruption of short circuits in the microsecond range, up to 1,000 times faster than conventional systems.
One of the key elements of the new portfolio is the SENTRON 3QD2 semiconductor circuit breaker. The device enables ultra-fast short-circuit interruption - in microseconds, up to 1,000 times faster than traditional solutions. This directly translates into reduced risk of damage, downtime, and costly failures. Importantly, SENTRON 3QD2 integrates protection, switching, and energy monitoring functions in a single device, simplifying the installation architecture.
Less power, fewer materials, lower costs
(illustration)The portfolio is complemented by SIRIUS 3RF5 semiconductor contactors and relays - a solution designed specifically for direct current applications. Thanks to their semiconductor design, these devices perform well in environments requiring frequent load switching, reducing mechanical wear and increasing the service life of the installation.
SIRIUS 3RF5 solid-state switching device
From a business perspective, DC technologies mean not only higher efficiency but also tangible savings. In industrial applications, peak power demand can be reduced by up to 80 percent, which directly impacts energy costs.Simplifying infrastructure also results in lower consumption of raw materials - including copper, by up to half. This is an important argument not only economically, but also environmentally.
A system, not individual devices
(illustration)The new Siemens solutions have been designed as part of a broader ecosystem. They can be integrated with low-voltage switchgear or busbar trunking systems, creating a coherent energy management environment in modern installations.
Siemens will present the expanded DC technology portfolio at Hannover Messe 2026.
Link to Press Release