OPTEK Technology Inc.—

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323– 2396 sensors@optekinc.com www.optekinc.com

Issue 1.3

05/10

Page 3 of 3

SMD Silicon Phototransistor

OP520, OP521

OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.

900

1100

1000

0%

20%

40%

60%

80%

100%

Wavelength (nm)

Relative Response vs. Wavelength

800

700

600

500

400

OP520

OP521

SMD Silicon Phototransistor

OP520, OP521

Collector-Emitter Dark Current

vs. Temperature

-25

0

25

Temperature—(°C)

10

1000

Relative On-State Collector Current

vs. Collector-Emitter Voltage

0

0.1

0.2

0.3

0.4

0.5

Collector-Emitter Voltage (V)

1

50

75

0.40

0.60

0.80

1.00

1.20

0.20

1.40

100

0

30

60

0%

20%

40%

60%

80%

100%

Angular Position (Degrees)

Relative Response vs.

Angular Position

0

-30

-60

-90

90

100