BC847 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 110 to 800
• Transition Frequency, min: 150 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The BC847 transistor can have a current gain of 110 to 800. The gain of the BC847A will be in the range from 110 to 220, for the BC847B it will be in the range from 200 to 450, for the BC847C it will be in the range from 420 to 800.The complementary PNP transistor to the BC847 is the BC857.You can replace the BC847 with the 2SC3912, 2SC3913, 2SC3914, 2SC3915, BC846, BC850, FMMT619, FMMT620, FMMTA05, FMMTA06, KST05, KST06, MMBTA05, MMBTA06, PMBTA06, SMBTA05 or SMBTA06.

.MODEL BC847 NPN( 
+     IS = 1.822E-14 
+     NF = 0.9932 
+     ISE = 2.894E-16 
+     NE = 1.4 
+     BF = 324.4 
+     IKF = 0.109 
+     VAF = 82 
+     NR = 0.9931 
+     ISC = 9.982E-12 
+     NC = 1.763 
+     BR = 8.29 
+     IKR = 0.09 
+     VAR = 17.9 
+     RB = 10 
+     IRB = 5E-06 
+     RBM = 5 
+     RE = 0.649 
+     RC = 0.7014 
+     XTB = 0 
+     EG = 1.11 
+     XTI = 3 
+     CJE = 1.244E-11 
+     VJE = 0.7579 
+     MJE = 0.3656 
+     TF = 4.908E-10 
+     XTF = 9.51 
+     VTF = 2.927 
+     ITF = 0.3131 
+     PTF = 0 
+     CJC = 3.347E-12 
+     VJC = 0.5463 
+     MJC = 0.391 
+     XCJC = 0.6193 
+     TR = 9E-08 
+     CJS = 0 
+     VJS = 0.75 
+     MJS = 0.333 
+     FC = 0.979)