BC490,A

4

Motorola Small–Signal Transistors, FETs and Diodes Device Data

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

–1.0 k

–1.0

–2.0

–5.0

Figure 6. Active Region, Safe Operating Area

CURRENT LIMIT

THERMAL LIMIT

SECOND BREAKDOWN LIMIT

–700

–500

–300

–200

–100

–70

–50

–30

–20

–10

–3.0

–10

–20

–50

–30

–7.0

–70 –100

BC490

100

µs

1.0 ms

1.0 s

TC = 25°C

TA = 25°C

IC, COLLECTOR CURRENT (mA)

Figure 7. “On” Voltages

1.0

0.8

0.6

0.4

0.2

0

0.5

1.0

200

20

TJ = 25°C

VBE(on) @ VCE = 1.0 V

VCE(sat) @ IC/IB = 10

5.0

10

50

100

VBE(sat) @ IC/IB = 10

2.0

500

IC, COLLECTOR CURRENT (mA)

Figure 8. Collector Saturation Region

1.0

0.8

0.6

0.4

0.2

0

0.1

10

1.0

TJ = 25°C

IC = 10 mA

0.05

0.2

0.5

2.0

5.0

20

100 mA

250 mA

50

mA

50

500 mA

IC, COLLECTOR CURRENT (mA)

Figure 9. Base–Emitter Temperature Coefficient

–0.8

–2.8

1.0

100

10

R

θVB for VBE

0.5

2.0

5.0

20

50

200

–1.2

–1.6

–2.0

–2.4

500

Figure 10. DC Current Gain

IC, COLLECTOR CURRENT (mA)

400

–0.5

–0.7

–1.0

–2.0

–3.0

–5.0

–7.0

–10

–20

–30

–50

–70

–100

–200

200

100

80

60

40

TJ = 125°C

25

°C

–55

°C

VCE = –1.0 V

–300

–500