The Bergquist Company 3223-07FR-104NH Breakdown Voltage Vbr: 3.5kV External Depth: 0.18mm Operating Temperature Range: -60?‚?°C To +180?‚?°C Packages Cooled: TO-3P Svhc: No SVHC (18-Jun-2010) Thermal Conductivity: 0.9W/m.K Thermal Resistance: 0.45?‚?°C/W