Stacks - The Fastest Path to World-Class Power Electronic Systems

With a strong history of delivering reliable power modules for UPS systems, we are ready for the next evolution of the data center ecosystem.

Today, both small and large data centers rely on Semikron Danfoss power modules inside UPS systems and motor drives for reliable power transfer and cooling. Power modules such as SEMITRANS 3 and SEMiX 5 are core components in 3-level converters used for today’s megawatt-class central UPS systems. Our strong motor drive portfolio is present in the variety of VFDs used in fan, pump, and compressor drives in data centers. And reliable, thyristor-equipped, SEMIPACK modules make up critical bypass and static transfer switches (STS).

The future hyperscale data centers and AI factories being designed now will need high-efficiency SiC modules and scalable power blocks to accommodate new power generation and distribution architectures. DC distribution, in particular, requires new converter topologies such as solid-state transformers (SST). The SEMITOP E2 with 2kV SiC MOSFETs is well suited for enabling this cell-based topology.

New Version of a Classic

The ubiquitous 62mm has been upgraded. With a complete internal redesign, the SEMITRANS 3+ pushes TNPC circuit configurations to higher power and enables easy implementation of SiC devices. The identical external appearance means the SEMITRANS 3+ can easily upgrade existing SEMITRANS 3 designs.

Key Features

• Complete redesign of internal structure
• Improved switching performance
• Extended power range up to ICnom = 1000A
• High-current power terminals
• Higher power cycling capability
• Humidity-robustness

2kV SiC is an enabler for 2-level converters in 1500VDC applications. Already an established solution for solar and energy storage systems, these modules are ideal for DC distribution techniques under discussion for large-scale data centers. SiC-equipped industrial power modules make upcoming solid-state transformers possible; efficiently transferring power across the medium frequency transformer (MFT) isolation barrier. The cellular topology of SSTs is well-served by SEMITOP E2 modules, which combine the latest SiC chipsets with outstanding thermal performance, low-inductance, and easy PCB integration.

H2S Protection and More

The global spread of data centers exposes external or machine-room equipment to air that may contain sulfur-containing chemicals from e.g. fertilizers used in farming or high pollution areas. These chemicals (typ. H2S) can react with the metals inside power modules and cause fatal short circuits when dendrites are formed. SemiSeal provides a protective layer inside power modules to prevent dendrite formation on critical surfaces. As an added benefit, in circuit products, it can also increase humidity robustness.

With increased demand for compact systems, higher efficiencies and faster switching at higher power levels, using a proven platform is key. By integrating the SiC power switches, module design, thermal concept, and gate driver into a single platform, the SKiiP 4 handles this complexity, enabling faster development and release.

As mainstays in the modern electrical grid, power converters for wind, solar, and ESS continue to push the limits of power density and reliability. Our portfolio is expanding with packaging technology and devices that support these topics.

Ready for High-Performance Chipsets

This new member of the SEMiX 3 Press-Fit family is optimized for the latest generation of high junction temperature, high-current chips. Semikron Danfoss’s new SEMiX 3p+ housing enables half-bridge modules with maximum current ratings of at least 900A and operating junction temperatures of 175°C. Welded high-current terminals ensure reliable connection while advanced materials withstand and dissipate heat.

When equipped with the new 1700V IGBT C7 from CRRC, the SEMiX 3p+ provides especially improved power density and performance for high-power wind converters.

Key Features

• New SEMiX 3p+ housing
• High-temperature materials
• Welded power terminals
• Extended power range up to ICnom = 900A
• Humidity-robustness
• New 1700V chip supplier
• New 1200V CAL 7 diodes

Enhancing Supply Chain Safety

The latest generation IGBT and diode chips from CRRC are now available in a variety of power modules with blocking voltages of 1200V, 1700V, and 2300V. CRRC IGBTs feature a maximum operating junction temperature of up to 175°C and low conduction and switching losses. These high-power chips are ideal for 3-level ANPC converters for wind, 2-level motor drives, and power dense 1500V converters for solar, ESS, and green hydrogen. A proven chip supplier in China, CRRC allows us to offer power modules with complete local content at our facility in Nanjing.

Lead Products:

• SEMiX 3p+
• SEMITRANS 10+
• SEMITRANS 20
• MiniSKiiP

H2S Protection and More

Power converters are increasingly deployed in environments where sulfur-containing chemicals are present, either through specific industrial processes (fertilizers from farming) or general pollution. These chemicals (typ. H2S) can react with the metals inside power modules and cause fatal short circuits when dendrites are formed. SemiSeal provides a protective layer inside power modules to prevent dendrite formation on critical surfaces. As an added benefit, in certain products, it can also increase the humidity robustness.

CAL 7 diodes pair Semikron Danfoss’s proven Controlled Axial Lifetime (CAL) diode design with the latest thin wafer technology for smooth switching in high-power industrial applications.

When used as a freewheeling diode in anti-parallel with the latest generation IGBTs, the CAL 7 exhibits a soft turn-off that reduces overvoltage peaks and ringing. This, in turn, allows for lower gate resistors and lower switching losses. The smoother switching also reduces the EMI footprint of the converter.

The use of thin wafers also improves power cycling capability as the reduced silicon thickness causes less stress on front- and backside connections.

CAL 7 diodes are available inside a wide variety of new power modules as well as in bare die form.

Benefits

• 25% higher current density than CAL 4
• Improved switching performance
• Higher power cycling capability (+30% over CAL 4 with ΔT = 110K)
• Positive temperature coefficient for effective paralleling
• Available with blocking voltages of 1200V and 1700V

Lead Types

• MiniSKiiP
• SEMITRANS 3+
• SEMiX 3p+

With a strong history of delivering reliable power modules for UPS systems, we are ready for the next evolution of the data center ecosystem.

Today, both small and large data centers rely on Semikron Danfoss power modules inside UPS systems and motor drives for reliable power transfer and cooling. Power modules such as SEMITRANS 3 and SEMiX 5 are core components in 3-level converters used for today’s megawatt-class central UPS systems. Our strong motor drive portfolio is present in the variety of VFDs used in fan, pump, and compressor drives in data centers. And reliable, thyristor-equipped, SEMIPACK modules make up critical bypass and static transfer switches (STS).

The future hyperscale data centers and AI factories being designed now will need high-efficiency SiC modules and scalable power blocks to accommodate new power generation and distribution architectures. DC distribution, in particular, requires new converter topologies such as solid-state transformers (SST). The SEMITOP E2 with 2kV SiC MOSFETs is well suited for enabling this cell-based topology.

New Version of a Classic

The ubiquitous 62mm has been upgraded. With a complete internal redesign, the SEMITRANS 3+ pushes TNPC circuit configurations to higher power and enables easy implementation of SiC devices. The identical external appearance means the SEMITRANS 3+ can easily upgrade existing SEMITRANS 3 designs.

Key Features

• Complete redesign of internal structure
• Improved switching performance
• Extended power range up to ICnom = 1000A
• High-current power terminals
• Higher power cycling capability
• Humidity-robustness

2kV SiC is an enabler for 2-level converters in 1500VDC applications. Already an established solution for solar and energy storage systems, these modules are ideal for DC distribution techniques under discussion for large-scale data centers. SiC-equipped industrial power modules make upcoming solid-state transformers possible; efficiently transferring power across the medium frequency transformer (MFT) isolation barrier. The cellular topology of SSTs is well-served by SEMITOP E2 modules, which combine the latest SiC chipsets with outstanding thermal performance, low-inductance, and easy PCB integration.

H2S Protection and More

The global spread of data centers exposes external or machine-room equipment to air that may contain sulfur-containing chemicals from e.g. fertilizers used in farming or high pollution areas. These chemicals (typ. H2S) can react with the metals inside power modules and cause fatal short circuits when dendrites are formed. SemiSeal provides a protective layer inside power modules to prevent dendrite formation on critical surfaces. As an added benefit, in circuit products, it can also increase humidity robustness.

With increased demand for compact systems, higher efficiencies and faster switching at higher power levels, using a proven platform is key. By integrating the SiC power switches, module design, thermal concept, and gate driver into a single platform, the SKiiP 4 handles this complexity, enabling faster development and release.

As mainstays in the modern electrical grid, power converters for wind, solar, and ESS continue to push the limits of power density and reliability. Our portfolio is expanding with packaging technology and devices that support these topics.

Ready for High-Performance Chipsets

This new member of the SEMiX 3 Press-Fit family is optimized for the latest generation of high junction temperature, high-current chips. Semikron Danfoss’s new SEMiX 3p+ housing enables half-bridge modules with maximum current ratings of at least 900A and operating junction temperatures of 175°C. Welded high-current terminals ensure reliable connection while advanced materials withstand and dissipate heat.

When equipped with the new 1700V IGBT C7 from CRRC, the SEMiX 3p+ provides especially improved power density and performance for high-power wind converters.

Key Features

• New SEMiX 3p+ housing
• High-temperature materials
• Welded power terminals
• Extended power range up to ICnom = 900A
• Humidity-robustness
• New 1700V chip supplier
• New 1200V CAL 7 diodes

Enhancing Supply Chain Safety

The latest generation IGBT and diode chips from CRRC are now available in a variety of power modules with blocking voltages of 1200V, 1700V, and 2300V. CRRC IGBTs feature a maximum operating junction temperature of up to 175°C and low conduction and switching losses. These high-power chips are ideal for 3-level ANPC converters for wind, 2-level motor drives, and power dense 1500V converters for solar, ESS, and green hydrogen. A proven chip supplier in China, CRRC allows us to offer power modules with complete local content at our facility in Nanjing.

Lead Products:

• SEMiX 3p+
• SEMITRANS 10+
• SEMITRANS 20
• MiniSKiiP

H2S Protection and More

Power converters are increasingly deployed in environments where sulfur-containing chemicals are present, either through specific industrial processes (fertilizers from farming) or general pollution. These chemicals (typ. H2S) can react with the metals inside power modules and cause fatal short circuits when dendrites are formed. SemiSeal provides a protective layer inside power modules to prevent dendrite formation on critical surfaces. As an added benefit, in certain products, it can also increase the humidity robustness.