Focused for maximum sensitivity
Phototransistor or photodarlington output
Crosstalk does not exceed specified ICEO
24” (610 mm) wire length
26 AWG wire size
OPB708,
OPB709,
OPB740,
OPB745
Series
OPB7_ _WZ
Series
Each reflective object sensor in the
OPB708, OPB709, OPB740
through
OPB746
and
OPB740WZ
through
OPB746WZ
series
consists of an infrared emitting diode and a NPN silicon phototransistor or a photodarlington. The
OPB747WZ
and
OPB748WZ
consist of a Red visible LED and a low light level rejection (R
BE
) NPN silicon phototransistor. The Red LED allows
better contrast ratio when detecting Black marks on a White surface. All these devices are mounted side-by-side on
converging optical axes in a black plastic housing focusing on a small area and depth of field.
OPB7 _ _ WZ
series are wired (UL approved wire) devices that offer various lens options, including no windows, blue
polysulfone windows for dust protection or opaque aperture windows with offset openings for improved target resolution.
On each sensor included in this data sheet, the photosensor responds to radiation only when a reflective object passes
within its field of view.
Custom IC(ON) current binning, special wire lengths and connectorization is available through your OPTEK rep.
Part
Number
OPB708
OPB709
OPB740
OPB741
OPB742
OPB743
OPB744
OPB745
OPB740WZ
OPB741WZ
OPB742WZ
OPB743WZ
OPB744WZ
OPB745WZ
OPB746WZ
OPB747WZ
OPB748WZ
LED Peak
Wavelength
935 nm
Reflection
Distance
Inch (mm)
Lead Length/
Wire Type
Non-contact reflective object sensor
Assembly line automation
Machine automation
Machine safety
End of travel sensor
Door sensor
Thermal Paper Mark
Sensor
Transistor
Darlington
Transistor
0.150"
Minimum
890 nm
Darlington
CONTAINS POLYSULFONE
To avoid stress cracking, we suggest using
ND Industries’
Vibra-Tite
for thread-locking.
Vibra-Tite
evaporates fast without causing structural
failure in OPTEK’s molded plastics.
Applies to: OPB460, OPB470, OPB480, OPB490.
Min=0.08” [2.04mm]
Typ=0.15" [3.81mm]
Max=0.30” [7.62mm]
Transistor
24" / 26
AWG Wire
Darlington
935 nm
645nm
R
BE
Transistor
Transistor
RoHS
OPB708, OPB709, OPB740, OPB741,
OPB742, OPB743, OPB744, OPB745
[ MILLIMETERS]
DIMENSIONS ARE IN:
INCHES
OPB740WZ, OPB741WZ, OPB742WZ, OPB743WZ,
OPB744WZ, OPB745WZ, OPB746WZ, OPB747WZ,
OPB748WZ
Package Style
Part Number
OPB708
OPB709
OPB740
OPB740WZ
OPB741
OPB741WZ
OPB742
OPB742WZ
OPB743
Lens Configuration
D - No windows
D - No windows
A - No windows
A - No windows
B - Blue windows
B - Blue windows
C - Offset windows
C - Offset windows
A - No windows
A - No windows
B - Blue windows
B - Blue windows
C - Offset windows
C - Offset windows
B - Blue windows
C - Offset windows
C - Offset windows
OPB708
OPB740
thru
OPB744
OPB740WZ
thru
OPB744WZ
OPB746WZ,
OPB747WZ,
OPB748WZ
OPB709,
OPB745,
OPB745WZ
OPB743WZ
OPB744
OPB744WZ
OPB745
OPB745WZ
OPB746WZ
OPB747WZ
Color-PIN #
Orange-1
Green-2
LED
Anode
Cathode
Color-PIN #
White-4
Blue-3
Transistor
Collector
Emitter
OPB748WZ
Operating and Storage Temperature Range
OPB708, OP709, OPB740, OPB741, OPB742, OPB743, OPB744, OPB745
-40° C to +85° C
OPB741WZ, OPB742WZ, OPB743WZ, OPB744WZ, OPB745WZ, OPB746WZ, OPB747WZ, OPB748WZ -40° C to +80° C
Lead Soldering Temperature [1/16 inch (1.6mm) from the case for 5 sec. with soldering iron]
(1)
Input Diode
(See OP165 (935 nm), OP265 (890 nm) or OVLAS6CB8 (645 nm) for additional information)
Forward DC Current
Reverse DC Voltage
Power Dissipation
(2)
Sensor Output
(See OP505 (Transistor), OP705 (R
BE
Transistor) or OP535 (Darlington) for additional Information)
Collector-Emitter Voltage
OPB708
OPB709
OPB740, OPB741, OPB742, OPB743, OPB744
OPB740WZ, OPB741WZ, OPB742WZ, OPB743WZ, OPB744WZ OPB748WZ
OPB745
OPB745WZ
OPB746WZ, OPB747WZ
Emitter-Collector Voltage
OPB708 through OPB745, OPB748
OPB746 through OPB747
Power Dissipation
(2)
Notes:
1. RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
2. Derate linearly 1.33 mW° C above 25° C.
260°C
40 mA
2V
100 mW
30 V
15 V
30 V
30 V
15 V
15 V
24 V
5.0 V
0.4 V
100 mW
645 nm LED
(See OVLAS6CB8 for generic information — for reference only)
V
F
I
R
Forward Voltage
Reverse Current
-
-
-
-
2.6
100
V
µA
I
F
= 20 mA
V
R
= 2 V
890 nm LED
(See OP265 for additional information — for reference only)
V
F
I
R
Forward Voltage
Reverse Current
-
-
-
-
1.8
100
V
µA
I
F
= 40 mA
V
R
= 2 V
935 nm LED
(See OP165 for additional information — for reference only)
V
F
I
R
Forward Voltage
Reverse Current
-
-
-
-
1.7
100
V
µA
I
F
= 40 mA
V
R
= 2 V
Output R
BE
Phototransistor
(See OP705 for general information — for reference only)
V
(BR)CEO
I
CEO
Collector-Emitter Breakdown Voltage
Collector Dark Current
24
-
-
-
-
100
V
nA
I
C
= 100 µA
V
CE
= 10 V, I
F
= 0, E
E
=0
Output Phototransistor
(See OP505 for general information — for reference only)
V
(BR)CEO
V
(BR)ECO
I
CEO
Collector-Emitter Breakdown Voltage
Emitter-Collector Breakdown Voltage
Collector Dark Current
30
5
-
-
-
-
-
-
100
V
V
nA
I
C
= 100 µA
I
E
= 100 µA
V
CE
= 10 V, I
F
= 0, E
E
=0
Output Photodarlington
(See OP535 for general information — for reference only)
V
(BR)CEO
V
(BR)ECO
I
CEO
Coupled
V
CE(SAT)
Saturation Voltage
OPB708
OPB709
On-State Collector Current
OPB708
OPB709
OPB740, OPB740WZ
OPB741, OPB741W Z
OPB742, OPB742WZ
OPB743, OPB743WZ
OPB744, OPB744WZ
OPB745, OPB745WZ
OPB746WZ
OPB747WZ
OPB748WZ
Crosstalk
OPB708, OPB709,
OPB740, OPB740WZ
OPB741, OPB741WZ
OPB742, OPB742WZ
OPB743, OPB743WZ
OPB744, OPB744WZ
OPB745, OPB745WZ
OPB746WZ
OPB747WZ
OPB748WZ
-
-
0.01
1.00
0.05
0.05
0.01
0.20
0.20
5.00
0.50
0.01
0.01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.40
1.10
3.00
-
2.50
2.50
0.70
2.00
2.00
26.0
2.50
0.70
0.70
-
10.0
10.0
1.0
20.0
20.0
25.0
1.0
1.0
1.0
Collector-Emitter Breakdown Voltage
Emitter-Collector Breakdown Voltage
Collector-Emitter Dark Current
OPB709, OPB745, OPB745WZ
15
5
-
-
-
-
-
-
25
V
V
µA
I
C
= 100 µA
I
E
= 100 µA
V
CE
= 5 V, I
F
= 0, E
E
=0
V
I
F
= 40 mA, I
c
= 3 µA , d = 0.15”
(1)(2)
I
C(ON)(1)(2)
mA
V
CE
= 5 V, I
F
= 40mA ,
d = 0.15” (3.810 mm)
I
CX(3)
µA
V
CC
= 5 V, I
F
= 40mA
Notes:
1.
The distance from the assembly face to the reflective surface is “d”.
2.
Reflective surface is Eastman Kodak (Catalog #190 3061) neutral white test card with 90% diffuse reflectance as a reflecting surface.
3.
Crosstalk is the photocurrent measured with current to the input diode, no reflective surface and no ambient light (E
E
= 0).
Transistor
Output vs Distance
Output vs Distance
OPB708 -
1.40
Normalized at 0.150" Kodak 90%
LED Forward Voltage vs Forward Current vs
Temperature
1.50
1.20
Kodak 90%
Kodak 19%
Copier Paper
Avery Label
Retro Material
1.40
Normalized Output (volts)
1.00
0.80
0.60
0.40
e
g
a
1.30
t
l
o
V
d
r
a
1.20
w
r
o
F
l
a
c
i
p
1.10
y
T
1.00
-40° C
-20° C
0° C
20° C
0.20
40° C
60° C
80° C
0.00
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0.90
0
5
10
15
20
25
30
35
40
Distance (inches)
Forward Current (mA)
OPB708 - Output vs Forward Current vs Temp
Temperature
2.50
Normalized Collector Current at 20mA and 20°C
-40° C
-20° C
0° C
20° C
40° C
60° C
80° C
Transistor Output vs Forward Current vs
2.00
Normalized Output
1.50
1.00
0.50
0.00
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
Forward Current (mA)
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