Taiwan Semi SA28CA R0, Bi-Directional TVS Diode, 500W, 2-Pin DO-15. Diode Configuration: Single. Maximum Clamping Voltage: 45.4V. Minimum Breakdown Voltage: 31.1V. Mounting Type: Through Hole. Maximum Reverse Stand-off Voltage: 28V. Maximum Peak Pulse Current: 11.5A. Minimum Operating Temperature: -55 °C. Maximum Operating Temperature: +175 °C. Test Current: 1mA. Dimensions: 7.6 x 3.6 x 3.6mm., Taiwan Semiconductor