Silicon carbide (SiC) modules integrate multiple SiC power devices into a single package, whereas SiC discretes contain a single power semiconductor device, such as a MOSFET or diode.

While SiC modules deliver higher power density, integrated isolation, and simplified integration for high-power systems, SiC discretes provide greater design flexibility, PCB-level customization, and cost-effective implementation for low to medium power applications.

The right choice depends on factors such as power level, mechanical constraints, power density targets, and overall system architecture. 

Learn how SiC powers next-gen data centers

What are SiC modules?

SiC modules can combine several, customizable topologies within one package. . They also include isolating ceramic substrates, interconnects, baseplates, thermal interface materials, and advanced packaging features like max. junction temperatures up to 200°C or enhanced lifetime using .XT interconnection technology.

  • MOSFETs enable fast and efficient switching
  • Schottky barrier diodes, when included, help minimize reverse-recovery losses
  • Al₂O₃ (Aluminium Oxide) substrates provide a cost-effective solution
  • AlN (Aluminium Nitride) substrates support higher thermal-performance requirements
  • Advanced materials and assembly techniques improve electrical and thermal performance

This helps SiC modules deliver high power density, lower parasitic inductance, and more in compact high-power systems.

Cross sectional of Infineon's SiC power module
Assembled view of Infineon's SiC power module

Figure 1: Cross-section and product image of SiC module

Package portfolio

Infineon’s CoolSiC™ modules are available from 400 V to 3300 V in package families such as Easy Power Modules, Econo IGBT Power Modules, and HybridPACK™. Depending on the product family, they support circuit configurations and topologies such as half-bridge, six-pack, four-pack, and booster modules.

What are SiC discretes?

SiC discretes are individual silicon carbide power devices, typically single SiC MOSFETs or SiC Schottky barrier diodes, packaged as standalone through-hole or surface-mount components. SiC MOSFET discretes are built for high-temperature operation, with maximum junction temperature ratings typically ranging from 175°C to 200°C, depending on package and device design.

Because each device is placed directly on the PCB, SiC discrete performance depends strongly on gate-loop inductance, power-loop inductance, thermal pad design, and electromagnetic interference (EMI) control​‌. This device-level architecture gives designers flexibility to select topology on PCB-level, package footprint, and cost-performance balance.

Package portfolio

Infineon's CoolSiC™ MOSFET discretes are available in voltage classes ranging from 400 V to 2000 V and is offered in package options including TO-247, TO-263 (D²PAK-7), TOLL, ThinTOLL, TOLT, and Q-DPAK, supporting a wide range of thermal and mechanical design requirements.

What are the differences between SiC modules and SiC discretes?

SiC modules and SiC discretes differ primarily in how SiC power devices are packaged and deployed within a power electronics system.

The following table summarizes these key differences at a system level. By using each technology where it fits best, manufacturers can optimize performance and cost.

Real-world application example

An industrial motor drive can use both SiC modules and SiC discretes in the same system. SiC modules are used in the main inverter stage to efficiently drive high-power motors. SiC discretes are used in auxiliary power supplies, gate-driver circuits, and braking functions.

Where are SiC modules and discretes used?

SiC modules and discretes can be used in the same application for different power and integration requirements.

Data center power solutions

  • SiC modules: High-power rack-level and power-distribution architectures where efficiency, reliability, and power density are critical
  • SiC discretes: Server power supplies, intermediate bus converters, and applications prioritizing compact layouts and design flexibility

EV charging

  • SiC modules: DC fast chargers (50-350 kW) require high power density, simplified integration, and efficient thermal management
  • SiC discretes: AC chargers (3.3-22 kW), lower-power charging stages, or designs requiring PCB-level flexibility and custom layouts

Photovoltaic

  • SiC modules: Central and utility-scale solar inverters above 100 kW benefit from higher power density and integrated thermal solutions
  • SiC discretes: Residential or lower-power solar inverter between 3 to 20 kW designs where layout flexibility and component-level optimization are important

Power conversion 

  • SiC modules: High-power AC/DC, DC/DC, and DC/AC conversion systems where efficiency and integration are primary goals
  • SiC discretes: Custom power-conversion architectures requiring greater design flexibility and individual device selection​‌

Looking to maximize efficiency and reliability in your next power electronics design?

Explore CoolSiC™ MOSFET technology and reliability

FAQs

1. Are SiC modules and discretes compatible with the same gate-driver technologies?

Both SiC modules and SiC discretes can use similar gate-driver technologies, but modules often require higher drive current, stronger isolation, and more advanced protection features to support their higher power levels and ensure reliable, efficient operation.

Yes, SiC modules and discretes can be used together in the same system, with modules handling high-power stages and discretes supporting lower-power or auxiliary functions to optimize cost, flexibility, and overall performance.

Growing demand from EVs, renewable energy, and DC fast charging, combined with advances in SiC manufacturing and packaging is accelerating adoption by improving efficiency, performance, and cost while supporting stricter energy-efficiency and power-density requirements.

Serviceability depends on system architecture. SiC modules often simplify replacement at the subsystem level, while discrete-based systems may enable lower cost component-level repair but can require more extensive troubleshooting.

Additional resources