MALVERN, Pa. —Vishay Intertechnology has introduced two new FRED Pt® 500 A Ultrafast soft recovery diode modules in the new TO-244 Gen III package. Offering higher reliability than previous-generation solutions, the Vishay Semiconductors VS-VSUD505CW60 and VS-VSUD510CW60 are designed to reduce losses and EMI / RFI in high frequency power conditioning systems.
The rugged TO-244 package of the diode modules released today withstands 46 000 IOL cycles at given conditions, offering an improved life expectancy over previous-generation devices. In addition, the industry-standard package is footprint-compatible with competing solutions in the TO-244 to provide a drop-in replacement for existing designs.
The VS-VSUD505CW60 and VS-VSUD510CW60 are ideally suited for high frequency welding; high current converters and ballast water management systems (BWMS) in railway equipment, cranes, and ships; UPS; and other applications where switching losses comprise a significant portion of the total losses. In these applications, the softness of their recovery eliminates the need for a snubber, reducing component counts and lowering costs.
Offered in a common cathode configuration, the diode modules provide low forward voltage drop down to 0.82 V, thermal resistance — junction to case — of 0.16 °C/W, and an operating temperature range up to +175 °C.
Device Specification Table:
| Part number | VS-VSUD505CW60 | VS-VSUD510CW60 |
| VR (V) | 600 | |
| IF(AV)(A) | 500 | |
| Qrr typical (nC) | 460 | 1770 |
| trr (ns) | 178 | 270 |
| VFM @ 250 A, +175 °C (V) | 0.95 | 0.82 |
| RthJC per diode (°C/W) | 0.160 | |
| Package | TO-244 | |
Samples and production quantities of the new FRED Pt soft recovery diode modules are available now, with lead times of 26 weeks.
