Radiation Hardened, High Voltage Schottky Diodes and Rectifiers for Space Applications

STMicroelectronics has introduced the ESCC qualified 200V and 400V power rectifiers and SEB (Single Event Burnout) immune Schottky rectifiers. These rad-hard Schottky devices are the industry’s first SEB rated Schottky devices, they are available in the voltage range of 45V and 150V. These devices are radiation-hardened, hence they are best suitable for usage in many converter topologies and space applications.

There are five ESCC qualified dual common cathode Schottky parts including the STPS40A45C that contains a 45V/2x20A diode in a TO-254AA through-hole package. The STPS80A45C is designed with a 45V/2x40A diode, whereas the STPS60A150C and STPS80A150C are designed with 150V/2x30A and 150V/2x40A diodes all the three devices are packaged in an SMD.5 hermetic surface-mount package. The STPS40A150C 150V/2x20A is offered in TO254AA.

The rectifier diodes are the STTH40200C 200V/2x20A dual diode in TO-254AA, and the STTH60200C dual 200V/2x30A and STTH60400 single 400V/60A diode in hermetic SMD1. The voltage drop of the devices has four values of operating current to let multiple different power-supply designs use a single device type for ease and simplicity.

 Features of rad-hard Schottky diodes

• Available in the voltage range of 45V and 150V
• Can be directly connected to 100V and 28V satellite power buses
• Maximum forward voltage at 40A/125°C:0.78V for 150 V devices, 0.61V for 45V devices
• SEB immune up to 61MeV/cm2/mg linear energy transfer (LET)
• Resist a total ionizing dose (TID) up to 3 Mrad (Si)
• Maximum dV/dt of 10 kV/µs

Note: More technical information about the rad-hard Schottky diodes can be found in the datasheet linked at the bottom of this page and on the respective product pages.