The BAV21 is a switching diode in a DO35 type package.
Peak Reverse Voltage: 250 V
Forward Continuous Current: 0.25 A
Max Surge Current: 1 A
Forward Voltage Drop: 1 V at 0.1 A
Reverse Current IR: 0.1uA
Maximum Power Dissipation: 0.5W
PLEASE NOTE: Never bend the leads in such a way as to apply any stress to the casing. Always use a heat sink when soldering.