KSC3503-C 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): 40 to 80
• 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 KSC3503-C transistor can have a current gain of 40 to 80. The gain of the KSC3503 will be in the range from 40 to 320, for the KSC3503-D it will be in the range from 60 to 120, for the KSC3503-E it will be in the range from 100 to 200, for the KSC3503-F it will be in the range from 160 to 320.The complementary PNP transistor to the KSC3503-C is the KSA1381-C.The 2SC4497 (SOT-23), 2SC4497-R (SOT-23) and PMBTA42 (SOT-23) is the SMD version of the KSC3503-C transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KSC3503-C with the 2N5656, 2N5656G, 2N5657, 2N5657G, 2SC2688, 2SC2688-N, 2SC2752, 2SC2752K, 2SC2899, 2SC3417, 2SC3417-C, 2SC3503, 2SC3503-C, 2SC3789, 2SC3789-C, 2SC3790, 2SC3790-C, 2SC4212, BD128, BD129, BD158, BD159, BD410, KSC2258A, KSC2688, KSC2688-R, KSC2752, KSC2752Y, KSE340, MJE340, MJE340G, MJE3439 or MJE3439G.