2SA504-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.6 A
• Collector Dissipation: 6 W
• DC Current Gain (h_fe): 50 to 150
• Transition Frequency, min: 130 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The 2SA504-O transistor can have a current gain of 50 to 150. The gain of the 2SA504 will be in the range from 30 to 300, for the 2SA504-GR it will be in the range from 100 to 300, for the 2SA504-R it will be in the range from 30 to 90.Sometimes the "2S" prefix is not marked on the package - the 2SA504-O might only be marked "A504-O".The complementary NPN transistor to the 2SA504-O is the 2SC504-O.You can replace the 2SA504-O with the 2N4037, 2N4234, 2N4235, 2SA503, 2SA503-O, 2SA512, 2SA512-O, BC160, BC161, BC460 or BC461.