2SB621-S Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -25 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 0.75 W
• DC Current Gain (h_fe): 170 to 340
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SB621-S is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The 2SB621-S transistor can have a current gain of 170 to 340. The gain of the 2SB621 will be in the range from 85 to 340, for the 2SB621-Q it will be in the range from 85 to 170, for the 2SB621-R it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SB621-S might only be marked "B621-S".The complementary NPN transistor to the 2SB621-S is the 2SD592-S.The 2SA1204 (SOT-89), 2SA1204-Y (SOT-89), 2SA1298 (SOT-23), 2SA1298-Y (SOT-23), 2SA1588 (SOT-323), 2SA1621 (SOT-23), 2SA1621-Y (SOT-23), 2SB766 (SOT-89), 2SB766-S (SOT-89), BC808 (SOT-23), BC808-25 (SOT-23), BC808-25W (SOT-323), BC808W (SOT-323), FMMT549A (SOT-23), KSA1298 (SOT-23), KSA1298-Y (SOT-23), KTA1298 (SOT-23), KTA1298-Y (SOT-23), KTA1505 (SOT-23), KTA1505S (SOT-23), KTA1664 (SOT-89) and KTA1664Y (SOT-89) is the SMD version of the 2SB621-S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB621-S with the 2N4954, 2SA1382, 2SA1534, 2SA1534-S, 2SA1534A, 2SA1534A-S, 2SA1680, 2SA1761, 2SA683, 2SA683-S, 2SA684, 2SA684-S, 2SB1116, 2SB1229, 2SB564, 2SB598, 2SB621A, 2SB621A-S, 2SB892, 2SB985, KSB1116, KSB1116S, KSB564AC or KSB811.