This post explains for the transistor D526.
See the preview image and the PDF file for more information.
Part Number : D526, 2SD526
Function : NPN Triple Diffused Type Transistor
Package : TO-220AB Type
Manufactures : Toshiba Semiconductor
Description
1. High Power Dissipation : Pc = 30W ( Tc = 25’C )
2. Good Linearity of hFE
3. Complementary to 2SB596
4. Recommend for 20 ~ 25W High Fidelity Audio Frequency Amplifier Output Stage.
D526 Pinout
Maximum Ratings
1. Collector-Base Voltage : Vcbo = 80V
2.Collector-Emitter Voltage : Vceo = 80V
3. Emitter-Base Voltage : Vebo = 5V
4. Collector Current : Ic = 4A
5. Collector Power Dissipation : Pc = 30W
Applications
1. Power Amplifier