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 C 10/11
Page 1 of 6
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Reflective Object Sensor
OPB708, OPB709
OPB740 Series, OPB740WZ Series
Description:
Each reflective object sensor in the OPB708, OPB709, OPB740 through OPB746 and OPB740WZ through
OPB746WZ series consists of an infrare d 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 (RBE) 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 o ptions, 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, sp ecial wire lengths and connectorization is available through your OPTEK rep.
Features:
Focused for maximum sensitivity
Phototransistor or photodarlington output
Crosstalk does not exceed specified ICEO
24” (610 mm) wire length
26 AWG wire size
Product Photo Here
Applications:
Non-contact reflective object sensor
Assembly line automation
Machine automation
Machine safety
End of travel sensor
Door sensor
Thermal Paper Mark
OPB7_ _WZ
Series
OPB708,
OPB709,
OPB740,
OPB745
Series
Part
Number
LED Peak
Wavelength
Sensor
Reflection
Distance
Inch (mm)
Lead Length/
Wire Type
OPB708 935 nm Transistor
Min=0.08” [2.04mm]
Typ=0.15" [3.81mm]
Max=0.30” [7.62mm]
0.150"
Minimum
OPB709 Darlington
OPB740
890 nm
Transistor
OPB741
OPB742
OPB743
OPB744
OPB745 Darlington
OPB740WZ
Transistor
24" / 26
AWG Wire
OPB741WZ
OPB742WZ
OPB743WZ
OPB744WZ
OPB745WZ Darlington
OPB746WZ 935 nm
OPB747WZ 645nm
OPB748WZ Transistor
RBE Transistor
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.
RoHS
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 C 10/11
Page 2 of 6
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Reflective Object Sensor
OPB708, OPB709
OPB740 Series, OPB740WZ Series
Color-PIN # LED Color-PIN # Transistor
Orange-1 Anode White-4 Collector
Green-2 Cathode Blue-3 Emitter
OPB708, OPB709, OPB740, OPB741,
OPB742, OPB743, OPB744, OPB745
OPB709,
OPB745,
OPB740WZ, OPB741WZ, OPB742WZ, OPB743WZ,
OPB744WZ, OPB745WZ, OPB746WZ, OPB747WZ,
OPB748WZ
Package Style
Part Number Lens Configuration
OPB708 D - No windows
OPB709 D - No windows
OPB740 A - No windows
OPB740WZ A - No windows
OPB741 B - Blue windows
OPB741WZ B - Blue windows
OPB742 C - Offset windows
OPB742WZ C - Offset windows
OPB743 A - No windows
OPB743WZ A - No windows
OPB744 B - Blue windows
OPB744WZ B - Blue windows
OPB745 C - Offset windows
OPB745WZ C - Offset windows
OPB746WZ B - Blue windows
OPB747WZ C - Offset windows
OPB748WZ C - Offset windows
DIMENSIONS ARE IN:
INCHES
[ MILLIMETERS]
OPB708
OPB740 thru OPB744 OPB746WZ,
OPB747WZ,
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 C 10/11
Page 3 of 6
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Reflective Object Sensor
OPB708, OPB709
OPB740 Series, OPB740WZ Series
Absolute Maximum Ratings (TA=25°C unless otherwise noted)
Operating and Storage T emperature Range
OPB708, OP709, OPB740, OPB741, OPB742, OPB743, OPB744, OPB745
OPB741WZ, OPB742WZ, OPB743WZ , OPB744WZ , OPB745WZ, OPB746WZ, OPB747WZ,
OPB748WZ
-40° C to +85° C
-40° C to +80° C
Lead Soldering Temperature [1/16 inch (1.6mm) from the case for 5 sec. with soldering iron](1) 260°C
Input Diode (See OP165 (935 nm), OP265 (890 nm) or OVLAS6CB8 (645 nm) for additional information)
Forward DC Current 40 mA
Reverse DC Voltage 2 V
Power Dissipation(2) 100 mW
Sensor Output (See OP505 (Transistor), OP705 (RBE 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
30 V
15 V
30 V
30 V
15 V
15 V
24 V
Emitter-Collector Voltage
OPB708 through OPB745, OPB748
OPB746 through OPB747
5.0 V
0.4 V
Power Dissipation(2) 100 mW
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.
Electrical Characteristics (TA = 25°C unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
890 nm LED (See OP265 for additional information — for reference only)
VF Forward Voltage - - 1.8 V IF = 40 mA
IR Reverse Current - - 100 µA VR = 2 V
VF Forward Voltage - - 1.7 V IF = 40 mA
IR Reverse Current - - 100 µA VR = 2 V
935 nm LED (See OP165 for additional information — for reference only)
645 nm LED (See OVLAS6CB8 for generic i nformatio n — for reference only)
VF
IR
Forward Voltage - - 2.6 V IF = 20 mA
Reverse Current - - 100 µA VR = 2 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 C 10/11
Page 4 of 6
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Reflective Object Sensor
OPB708, OPB709
OPB740 Series, OPB740WZ Series
Electrical Characteristics (TA = 25°C unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
Output RBE Phototransistor (See OP705 for general information — for reference only)
V(BR)CEO Collector-Emitter Breakdown Voltage 24 - - V IC = 100 µA
ICEO Collector Dark Current - - 100 nA VCE = 10 V, IF = 0, EE =0
Output Phototransistor (See OP505 for general informatio n — for reference only)
V(BR)CEO Collector-Emitter Breakdown Voltage 30 - - V IC = 100 µA
V(BR)ECO Emitter-Collector Breakdown Voltage 5 - - V IE = 100 µA
ICEO Collector Dark Current - - 100 nA VCE = 10 V, IF = 0, EE =0
Output Photodarlington (See OP535 for general information — for reference only)
V(BR)CEO Collector-Emitter Breakdown Voltage 15 - - V IC = 100 µA
V(BR)ECO Emitter-Collector Breakdown Voltage 5 - - V IE = 100 µA
ICEO Collector-Emitter Dark Current
OPB709, OPB745, OPB745WZ
-
-
25
µA
VCE = 5 V, IF = 0, EE =0
Coupled
VCE(SAT) Saturation Voltage
OPB708
OPB709
-
-
-
-
0.40
1.10
V
IF = 40 mA, Ic = 3 µA , d = 0.15”(1)(2)
IC(ON)(1)(2)
On-State Collector Current
OPB708
OPB709
OPB740, OPB740WZ
OPB741, OPB741W Z
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
-
-
-
-
-
-
-
-
-
-
-
3.00
-
2.50
2.50
0.70
2.00
2.00
26.0
2.50
0.70
0.70
mA
VCE = 5 V, IF = 40mA ,
d = 0.15” (3.810 mm)
ICX(3)
Crosstalk
OPB708, OPB709,
OPB740, OPB740WZ
OPB741, OPB741WZ
OPB742, OPB742WZ
OPB743, OPB743WZ
OPB744, OPB744WZ
OPB745, OPB745WZ
OPB746WZ
OPB747WZ
OPB748WZ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10.0
10.0
1.0
20.0
20.0
25.0
1.0
1.0
1.0
µA
VCC = 5 V, IF = 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 (EE = 0).
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 C 10/11
Page 5 of 6
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Reflective Object Sensor
OPB708, OPB709
OPB740 Series, OPB740WZ Series
OPB708 - Output vs Forward Current vs Temp
0.00
0.50
1.00
1.50
2.00
2.50
0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00
Forward Current (mA)
Normalized Output
-40° C
-20° C
0° C
20° C
40° C
60° C
80° C
Normalized Collector Current at 20mA and 20°C
OPB708 - Output vs Distance
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
Distance (inches)
No rmaliz ed O u tp ut (v olts )
Kodak 90%
Kodak 19%
Copier Paper
Avery Label
Retro Material
Normalized at 0.150" Kodak 90%
Transistor Output vs Distance
Transistor Output vs For ward Current
vs Temperature
0.90
1.00
1.10
1.20
1.30
1.40
1.50
0 5 10 15 20 25 30 35 40
Forward C urrent (mA)
Typical Forward Voltage
-40° C
-20° C
C
20° C
40° C
60° C
80° C
LED Forward Voltage vs Forward
Current vs Temperature
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 C 10/11
Page 6 of 6
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Reflective Object Sensor
OPB708, OPB709
OPB740 Series, OPB740WZ Series
OPB709 - Output vs Forward Current vs Temp
0.00
0.50
1.00
1.50
2.00
2.50
0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00
Forw ard C urrent (mA)
Normalized Output
-40° C
-20° C
0° C
20° C
40° C
60° C
80° C
Normalized Collector Current at 20mA and 20°C
OPB709 - Output vs Distance
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
Distance (inch es)
No rm a lize d Out pu t (vo lts)
Kodak 90%
Kodak 19%
Copier Paper
Avery Label
Retro Material
Normalized at 0.150" Kodak 90%
Darlington Output vs Distance
Darlington Output vs Forward Current
vs Temperature
0.90
1.00
1.10
1.20
1.30
1.40
1.50
0 5 10 15 20 25 30 35 40
Forward Current (mA)
Typical Forward Voltage
-40° C
-20° C
C
20° C
40° C
60° C
80° C
LED Forward Voltage vs
Forward Current vs Temperature