Each reecve object sensor in the OPB708, OPB709, OPB740 through OPB746 and OPB740WZ through OPB746WZ series
consists of an infrared eming diode and a NPN silicon phototransistor or a photodarlington. The OPB747WZ and
OPB748WZ consist of a Red visible LED and a low light level rejecon (RBE) NPN silicon phototransistor. The Red LED allows
beer contrast rao when detecng Black marks on a White surface. All these devices are mounted side-by-side on
converging opcal axes in a black plasc housing focusing on a small area and depth of eld.
OPB7 _ _ WZ series are wired (UL approved wire) devices that oer various lens opons, including no windows, blue
polysulfone windows for dust protecon or opaque aperture windows with oset openings for improved target resoluon.
On each sensor included in this data sheet, the photosensor responds to radiaon only when a reecve object passes
within its eld of view.
Custom IC(ON) current binning, special wire lengths and connectorizaon is available through your OPTEK rep.
Non-contact reecve object sensor
Assembly line automaon
Machine automaon
Machine safety
End of travel sensor
Door sensor
Thermal Paper Mark
Focused for maximum sensivity
Phototransistor or photodarlington output
Crosstalk does not exceed specied ICEO
24” (610 mm) wire length
26 AWG wire size OPB7_ _WZ
Series
OPB708,
OPB709,
OPB740,
OPB745
Series
Part
Number
LED Peak
Wavelength
Sensor
Reecon
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 RBE Transistor
OPB747WZ 645nm
OPB748WZ 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
Color-PIN # LED Color-PIN # Transistor
Orange-1 Anode White-4 Collector
Green-2 Cathode Blue-3 Emier
OPB708, OPB709, OPB740, OPB741,
OPB742, OPB743, OPB744, OPB745
OPB709,
OPB745,
OPB745WZ
OPB740WZ, OPB741WZ, OPB742WZ, OPB743WZ,
OPB744WZ, OPB745WZ, OPB746WZ, OPB747WZ,
OPB748WZ
Package Style
Part Number Lens Conguraon
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 - Oset windows
OPB742WZ C - Oset windows
OPB743 A - No windows
OPB743WZ A - No windows
OPB744 B - Blue windows
OPB744WZ B - Blue windows
OPB745 C - Oset windows
OPB745WZ C - Oset windows
OPB746WZ B - Blue windows
OPB747WZ C - Oset windows
OPB748WZ C - Oset windows
DIMENSIONS ARE IN:
INCHES
[ MILLIMETERS]
OPB708
OPB740 thru OPB744
OPB740WZ thru OPB744WZ
OPB746WZ,
OPB747WZ,
OPB748WZ
Operang and Storage Temperature 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 addional informaon)
Forward DC Current 40 mA
Reverse DC Voltage 2 V
Power Dissipaon(2) 100 mW
Sensor Output (See OP505 (Transistor), OP705 (RBE Transistor) or OP535 (Darlington) for addional Informaon)
Collector-Emier 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
Emier-Collector Voltage
OPB708 through OPB745, OPB748
OPB746 through OPB747
5.0 V
0.4 V
Power Dissipaon(2) 100 mW
645 nm LED (See OVLAS6CB8 for generic informaon — for reference only)
VF Forward Voltage - - 2.6 V IF = 20 mA
IR Reverse Current - - 100 µA VR = 2 V
890 nm LED (See OP265 for addional informaon — for reference only)
VF Forward Voltage - - 1.8 V IF = 40 mA
IR Reverse Current - - 100 µA VR = 2 V
935 nm LED (See OP165 for addional informaon — for reference only)
VF Forward Voltage - - 1.7 V IF = 40 mA
IR Reverse Current - - 100 µA VR = 2 V
Notes:
1. RMA ux is recommended. Duraon can be extended to 10 seconds maximum when ow soldering.
2. Derate linearly 1.33 mW° C above 25° C.
Output RBE Phototransistor (See OP705 for general informaon — for reference only)
V(BR)CEO Collector-Emier 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 informaon — for reference only)
V(BR)CEO Collector-Emier Breakdown Voltage 30 - - V IC = 100 µA
V(BR)ECO Emier-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 informaon — for reference only)
V(BR)CEO Collector-Emier Breakdown Voltage 15 - - V IC = 100 µA
V(BR)ECO Emier-Collector Breakdown Voltage 5 - - V IE = 100 µA
ICEO Collector-Emier Dark Current
OPB709, OPB745, OPB745WZ
-
-
25
µA
VCE = 5 V, IF = 0, EE =0
Coupled
VCE(SAT)
Saturaon 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 reecve surface is “d”.
2. Reecve surface is Eastman Kodak (Catalog #190 3061) neutral white test card with 90% diuse reectance as a reecng surface.
3. Crosstalk is the photocurrent measured with current to the input diode, no reecve surface and no ambient light (EE = 0).
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
Normalized Output (volts)
Kodak 90%
Kodak 19%
Copier Paper
Avery Label
Retro Material
Normalized at 0.150" Kodak 90%
0.90
1.00
1.10
1.20
1.30
1.40
1.50
0 5 10 15 20 25 30 35 40
T
y
p
i
c
a
l
F
o
r
w
a
r
d
V
o
l
t
a
g
e
Forward Current (mA)
-40° C
-20° C
0° C
20° C
40° C
60° C
80° C
LED Forward Voltage vs Forward Current vs
Temperature
Transistor Output vs Distance
Transistor Output vs Forward Current vs
Temperature
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
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
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 (inches)
Normalized Output (volts)
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
Forw ard Current (mA)
Typical Forward Voltage
-40° C
-20° C
0° C
20° C
40° C
60° C
80° C
LED Forward Voltage vs
Forward Current vs Temperature