2SC3503-D Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 300 V
• Collector-Base Voltage, max: 300 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 7 W
• DC Current Gain (h_fe): 60 to 120
• Transition Frequency, min: 150 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 2SC3503-D transistor can have a current gain of 60 to 120. The gain of the 2SC3503 will be in the range from 40 to 320, for the 2SC3503-C it will be in the range from 40 to 80, for the 2SC3503-E it will be in the range from 100 to 200, for the 2SC3503-F it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SC3503-D might only be marked "C3503-D".The complementary PNP transistor to the 2SC3503-D is the 2SA1381-D.The 2SC4497 (SOT-23), 2SC4497-O (SOT-23), BF620 (SOT-89), BF820 (SOT-23) and PMBTA42 (SOT-23) is the SMD version of the 2SC3503-D transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3503-D with the 2N5656, 2N5656G, 2N5657, 2N5657G, 2SC2688, 2SC2688-M, 2SC2899, 2SC3417, 2SC3417-D, 2SC3789, 2SC3789-D, 2SC3790, 2SC3790-D, 2SC4212, BD128, BD129, BD158, BD159, BD410, BUX86, BUX87, KSC2258A, KSC2688, KSC2688-O, KSC3503, KSC3503-D, KSE340, MJE340, MJE340G, MJE3439 or MJE3439G.