Document Number: 81134

www.vishay.com

Rev. 1.1, 21-Feb-11

3

VEMT2500X01, VEMT2520X01

Silicon NPN Phototransistor

Vishay Semiconductors

Fig. 2 - Collector Dark Current vs. Ambient Temperature

Fig. 3 - Collector Light Current vs. Irradiance

Fig. 4 - Rise/Fall Time vs. Collector Current

Fig. 5 - Relative Spectral Sensitivity vs. Wavelength

Fig. 6 - Relative Radiant Sensitivity vs. Angular Displacement

Fig. 7 - Relative Collector Current vs. Ambient Temperature

1

10

100

1000

10 000

0

1020

3040

5060

7080

90 100

T

I

V

V

V

5 V

20594

E

21573

0.01

0.1

1

10

100

0.01

0.1

1

10

V

λ = 950 nm

0

10

20

30

40

50

60

70

80

90

100

0

250

500

750 1000 1250 1500 1750 2000

I

t

f

t

r

20599

R

0

0.2

0.4

0.6

0.8

1.0

1.2

400

500

600

700

800

900

1000 1100

21555

λ - Wavelength (nm)

94 8248

0.6

0.9

0.8

0°

30°

10°

20°

40°

50°

60°

70°

80°

0.7

1.0

0

0.2

0.4

0

0.6

0.8

1.0

1.2

1.4

2.0

20

40

60

80

100

1.6

1.8

λ

94 8239

V

E

2

= 950 nm