OPTEK Technology Inc. --
1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue A 02/06
Page 1 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Slotted Optical Switch
OPB202
Applications:
Non-contact interruptive object
sensing
Assembly line automation
Machine automation
Equipment security
Machine safety
Features:
Opaque housing
Inexpensive plastic housing
0.110" (2.79 mm) gap small profile slotted switch
Customization available
Description:
OPB202
consists of an infrared Light Emitting Diode (LED) and an NPN silicon phototransistor mounted on
opposite sides of a 0.110 (2.79 mm) slot in an opaque plastic housing. Switching of the phototransistor occurs
whenever an opaque object to light wave lengths between 400nm and 1100 nm passes through the slot. The
lens on both the LED and phototransistor is 0.6" [1.5 mm] in diameter resulting in an equivalent aperture of
0.6" [1.5 mm].
Custom electrical, wire and cabling and connectors are available. Contact your local representative or OPTEK for
more information.
Product Photo Here
RoHS
1 4
2 3
Pin # Description
1 Anode
2 Cathode
3 Collector
4 Emitter
Ordering Information
Part
Number
Sensor
Aperture
Emitter/Sensor
OPB202
Transistor .06 [1.5] / .06 [1.5]
LED Peak
Wavelength
940 mm
[.085]
.033 SQ.
OPTEK Technology Inc. --
1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue A 02/06
Page 2 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Slotted Optical Switch
OPB202
Electrical Characteristics
(T
A
= 25
C unless otherwise noted)
SYMBOL PARAMETER MIN
TYP
MAX
UNITS
TEST
CONDITIONS
Input Diode
V
F
Forward
Voltage
- - 1.6 V I
F
= 20 mA
I
R
Reverse
Current
- - 100 A
V
R
= 2.0 V
Output Phototransistor
V
(BR)CEO
Collector-Emitter
Breakdown
Voltage 30 -
-
V I
C
= 1 mA
V
(BR)ECO
Emitter-Collector
Breakdown
Voltage
5
-
-
V I
E
= 100 A
I
CEO
Collector Dark Current
-
-
100
nA
V
CE
= 10 V, I
F
= 0, E
E
= 0
t
r
Rise
Time
- 3 15 s
t
f
Fall
Time
- 4 20 s
Combined
V
CE(SAT)
Collector-Emitter
Saturation
Voltage
-
-
0.4
V I
C
= 2.5 mA, I
F
= 20 mA
I
C(ON)
On-State Collector Current
5.0
-
-
mA
V
CE
= 5 V, I
F
= 20 mA
V
CE
= 5 V, I
C
= 2 mA, R
L
= 100
Notes:
(1) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
(2) Derate linearly 1.67 mW/C above 25 C.
(3) All parameters tested using pulse techniques.
(4) Methanol or isopropanol are recommended as cleaning agents. Plastic housing is soluble in chlorinated hydrocarbons and ke-
tones.
Absolute Maximum Ratings
(T
A
=25C unless otherwise noted)
Storage & Operating Temperature Range
-25C to +85 C
Lead Soldering Temperature [1/16 inch (1.6mm) from the case for 5 sec. with soldering iron]
(1)
260
C
Input Diode
Forward DC Current
50 mA
Peak Forward Current (1 s pulse width, 300 pps)
1 A
Reverse DC Voltage
2 V
Power Dissipation
(2)
75 mW
Collector-Emitter Voltage
30 V
Emitter-Collector Voltage
5 V
Output Phototransistor
Collector DC Current
20 mA
Power Dissipation
(2)
100 mW
OPTEK Technology Inc. --
1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue A 02/06
Page 3 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Slotted Optical Switch
OPB202
OPB202 - Flag Next to Emitter
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
Displacement Distance (inches)
Nor
m
a
l
ized I
C(
O
N
)
Re
spons
e
(mA)
Left to Right
Right to Left
Top to Bottom
Emitter
Sensor
Left to Right
Right to Left
0
Width
Top to Bottom
0
OPB202 - Flag Next to Sensor
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
Displacement Distance (inches)
Nor
m
al
ized I
C(
ON)
Re
s
pons
e (
m
A)
Left to Right
Right to Left
Top to Bottom
OPB202 - Flag in Middle of Slot
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
Displacement Distance (inches)
N
o
r
m
al
iz
e
d
I
C(O
N
)
Respon
se (
m
A)
Left to Right
Right to Left
Top to Bottom
OPTEK Technology Inc. --
1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue A 02/06
Page 4 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Slotted Optical Switch
OPB202
OPB202 - Forward Current vs Forward Voltage
0
5
10
15
20
25
30
35
40
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
Forward Voltage (volts)
Forward C
u
rrent
(mA)
OPB202 - Collector Current vs Collector-Emitter
Voltage
0
5
10
15
20
0
1
2
3
4
5
Collector-Emitter Voltage V
CE
(volts)
Collector Current I
C
(mA)
I
F
= 5 mA
I
F
= 10 mA
I
F
= 15 mA
I
F
= 20 mA
I
F
= 25 mA
I
F
= 30 mA
85
OPB202 - Power Dissiplation vs Ambient
Temperature
0
20
40
60
80
100
120
-25
0
25
50
75
100
Ambient Temperature T
A
(C)
Po
w
e
r
D
i
s
s
i
p
a
t
i
on
P (
m
W
)
Power Sensor
Power Emitter
OPB202 - Collector Current vs Ambient Temperature
0.0
1.5
3.0
4.5
6.0
7.5
9.0
-25
0
25
50
75
100
Ambient Temperature T
A
(C)
C
o
l
l
ector
C
u
r
r
ent
I
C
(m
A
)
I
F
= 20 mA
V
CE
= 5 V
OPTEK Technology Inc. --
1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue A 02/06
Page 5 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Slotted Optical Switch
OPB202
Response Time vs. Load Resistance
0
10
20
30
40
50
60
70
80
90
100
0.0
2.0
4.0
6.0
8.0
10.0
Load Resistance RL (K-Ohm)
Ty
pi
cal Resp
onse
Ti
me
(
S)
Rise Time
Fall Time
R
L
R
D
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