BC857B datasheet(3/6 Pages) ONSEMI

Part #	BC857B

Description	General Purpose Transistors

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Manufacturer	ONSEMI [ON Semiconductor]

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3 / 6 page

BC856B, BC857B, BC858A

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3

BC857/BC858

Figure 1. Normalized DC Current Gain

IC, COLLECTOR CURRENT (mAdc)

2.0

Figure 2. “Saturation” and “On” Voltages

IC, COLLECTOR CURRENT (mAdc)

-0.2

0.2

Figure 3. Collector Saturation Region

IB, BASE CURRENT (mA)

Figure 4. Base−Emitter Temperature Coefficient

IC, COLLECTOR CURRENT (mA)

-0.6

-0.7

-0.8

-0.9

-1.0

-0.5

0

-0.2

-0.4

-0.1

-0.3

1.6

1.2

2.0

2.8

2.4

-1.2

-1.6

-2.0

-0.02

-1.0

-10

0

-20

-0.1

-0.4

-0.8

1.5

1.0

0.7

0.5

0.3

-0.2

-10

-100

-1.0

TA = 25°C

VBE(sat) @ IC/IB = 10

VCE(sat) @ IC/IB = 10

VBE(on) @ VCE = -10 V

VCE = -10 V

TA = 25°C

-55

°C to +125°C

IC = -100 mA

IC = -20 mA

-0.5 -1.0

-2.0

-5.0 -10

-20

-50

-100 -200

-0.1 -0.2

-0.5

-1.0

-2.0

-5.0

-10

-20

-50

-100

IC = -200 mA

IC = -50 mA

IC =

-10 mA

Figure 5. Capacitances

VR, REVERSE VOLTAGE (VOLTS)

10

Figure 6. Current−Gain − Bandwidth Product

IC, COLLECTOR CURRENT (mAdc)

-0.4

1.0

80

100

200

300

400

60

20

40

30

7.0

5.0

3.0

2.0

-0.5

TA = 25°C

Cob

Cib

-0.6

-1.0

-2.0

-4.0 -6.0

-10

-20 -30 -40

150

-1.0

-2.0 -3.0

-5.0

-10

-20

-30

-50

VCE = -10 V

TA = 25°C

1.0

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