Superjunction MOSFETs support design of more reliable and efficient relays and fuses

Infineon provides S7 and S7A MOSFET families to replace electromechanical relays and fuses with superior solid-state technology.

Infineon is releasing a set of design guides and MOSFET products to help OEMs to replace conventional electromechanical switching devices such as relays, circuit breakers and melting fuses with new solid-state solutions.

With the Super Solid-State Solutions (S4) range, Infineon enables manufacturers of switching devices not only to extend the lifetime of products, but to realize efficiency gains, performance improvement, and higher reliability.

In electromechanical devices that have switching functionality, such as relays, circuit breakers, and fuses, the switching element between a set of contacts is prone to wear, failure or overheating. This mechanical moving part can be replaced with Infineon MOSFET-based technology to create a superior solid-state alternative. 

In a relay, the transition to an Infineon S4 product gives various benefits:

  • No mechanical contact or moving parts
  • Longer electrical and mechanical life expectancy and higher reliability
  • Higher shock and vibration resistance
  • No bounce or electrical arcing
  • Typically far lower power consumption 

The S4 range from Infineon uses 600 V CoolMOS™ S7 superjunction MOSFETs for industrial applications, and 600 V CoolMOS S7A MOSFETs for automotive applications. The S7 MOSFETs are supplied in a novel, efficient QDPAK package that has top-side cooling, making it ideal for low-frequency switching applications and solid-state solutions.

The 600 V CoolMOS S7 and S7A MOSFET families offer the best performance for low-frequency switching applications at the best price. A highlight of the S7 family is the IPDQ60R010S7, which offers on-resistance as low as 10 mΩ, and is housed in the top-side-cooled surface-mount package.



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