The 2SK1937-01, 2SK-1937, K1937, 1937 is a 500V 15A 125W N-Channel Power MOSFET, High Speed Switching - Low On-Resistance - No Secondary Breakdown - Low Driving Power - High Voltage - VGS = ± 30V
The BUX98A is a multi-epitaxial mesa NPN transistor in TO-3 metal case, intended for industrial applications from single and three phase mains operation.
The 2SC2553 is a Material of Transistor-Si Polarity: NPN Maximum Collector Power Dissipation 40W Maximum Collector-Base Voltage 500V Maximum Collector-Emitter Voltage 400V Maximum Emitter-Base Voltage 7V Maximum Collector Current 5A Max.
The 2SD880 transistor can have a current gain of 60 to 300. The gain of the 2SD880O will be in the range from 60 to 120, for the 2SD880Y it will be in the range from 100 to 200, for the 2SD880GR it will be in the range from 150 to 300.