2SA505-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SA505-O transistor can have a current gain of 70 to 140. The gain of the 2SA505 will be in the range from 40 to 240, for the 2SA505-R it will be in the range from 40 to 80, for the 2SA505-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SA505-O might only be marked "A505-O".The complementary NPN transistor to the 2SA505-O is the 2SC496-O.The 2SA1364 (SOT-89), BCP52 (SOT-223), BCP52-10 (SOT-223), BCX52 (SOT-89), BCX52-10 (SOT-89), FMMTA55 (SOT-23), KST55 (SOT-23) and MMBT4354 (SOT-23) is the SMD version of the 2SA505-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA505-O with the 2N4919, 2N4919G, 2N4920, 2N4920G, 2SA1214, 2SA743, 2SA743A, 2SB1165, 2SB1165-Q, 2SB1166, 2SB1166-Q, 2SB1167, 2SB1167-Q, 2SB1168, 2SB1168-Q, 2SB631, 2SB744A, BD138, BD138-10, BD138G, BD140, BD140-10, BD140G, BD168, BD170, BD178, BD178-10, BD180, BD180-10, BD180G, BD190, BD229, BD231, BD236, BD236G, BD238, BD238G, BD378, BD378-10, BD380, BD380-10, BD440, BD440G, BD442, BD442G, BD788, BD788G, BD790, BD792, KSB744A, KSE171, KSE172, KTA1715, KTA1715-O, MJE171, MJE171G, MJE172, MJE172G, MJE233, MJE234, MJE235, MJE250, MJE251, MJE252, MJE253, MJE253G, MJE254, MJE711 or MJE712.