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
Slotted Optical Switch
OPB852A1, OPB852A2, OPB852A3
OPB853A1, OPB853A2, OPB853A3
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.3 12/09
Page 1 of 3
DIMENSIONS ARE IN:
INCHES
[ MILLIMETERS]
Description:
Slotted optical switches in the OPB852, and OPB853 series consist of an infrared emitting diode and a NPN
silicon phototransistor or photodarlington, mounted on opposite sides of a 0.125” (3.175 mm) wide slot. The
OPB852A, OPB852B and OPB852C have phototransistor output, while the OPB853A, OPB853B and OPB853C
have photodarlington output.
On each of these devices, the emitter has a molded-in aperture of 0.050” x 0.050” (1.270 mm x 1.270 mm) and the
phototransistor (OPB852) or photodarlington (OPB853) has a molded-in aperture of 0.010” x 0.050” (0.254 mm x
1.270 mm).
Phototransistor or photodarlington switching occurs when an opaque object passes through the slot.
Custom electrical, wire and cabling and connectors are available. Contact your local representative or OPTEK for
more information.
Features:
• Inexpensive opaque plastic housing
• Choice of transistor (OPB852) or photodarlington (OPB853)
output
• 0.125” (3.18 mm) slot width
• 0.290” (7.37 mm) lead spacing
• Apertured for high resolution
Product Photo Here
RoHS
Pin # Description
1 Anode
2 Cathode
3 Collector
4 Emitter
OPB853
1
2
3
4
Applications:
• Non-contact interruptive object sensing
• Assembly line automation
• Machine automation
• Equipment security
• Machine safety
OPB852
1
2
3
4
Part
Number
LED Peak
Wavelength
Sensor
Slot
Width/
Depth
Apert ure
Emitter/
Sensor
Lead
Length /
Spacing
OPB852A1
890 nm
Transistor
0.120" /
0.315” 0.05" / 0.01"
OPB852A2
OPB852A3
OPB853A1
Darlington
OPB853A2
OPB853A3
0.425" /
0.290"
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.3 12/09
Page 2 of 3
Slotted Optical Switch
OPB852A1, OPB852A2, OPB852A3
OPB853A1, OPB853A2, OPB853A3
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
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) Methanol and isopropanol are recommended as cleaning agents. Housings are soluble in chlorinated hydrocarbons and
ketones. Highly activated, water soluble fluxes may attack housings in some situations.
(4) All parameters tested using pulse technique.
Absolute Maximum Ratings (TA=25°C unless otherwise noted)
Storage & Operating Temperature Range -40°C to +85° C
Lead Soldering Temperature [1/16 inch (1.6mm) from the case for 5 sec. with soldering iron] 260° C(1)
Input Diode
Forward DC Current 40 mA
Peak Forward Current (1 μs pulse width, 300 pps) 3 A
Reverse DC Voltage 2 V
Power Dissipation 100 mW(2)
Output Phototransistor
Collector-Emitter Voltage 30 V
Emitter-Collector Voltage 5 V
Power Dissipation 100 mW(2)
Electrical Characteristics (TA = 25°C unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
Input Diode (see OP140 for additional information—OPB852A_, OP245 for additional information—OPB853A)
VF Forward Voltage - - 1.7 V IF = 20 mA
IR Reverse Current - - 100 µA VR = 2 V
Output Phototransistor (see OP550 for additional information—OPB852A_, OP565 for additional information—OPB853A)
V(BR)CEO
Collector-Emitter Breakdown Voltage
OPB852A1, OPB852A2, OPB852A3
OPB853A1, OPB853A2, OPB853A3
30
15
-
-
-
-
V
V
IC = 1 mA
IC = 1 mA
V(BR)ECO Emitter-Collector Breakdown Voltage 5 - - V IE = 100 µA
ICEO Collector-Emitter Dark Current - - 100 nA VCE = 10 V
Combined
VCE(SAT)
Saturation Voltage
OPB852A1, OPB852A2
OPB852A3
OPB853A1, OPB853A2, OPB853A3
-
-
-
-
-
-
0.4
0.4
1.0
V
V
V
IC = 500 µA, IF = 20 mA
IC = 1.8 mA, IF = 20 mA
IC = 1.8 mA, IF = 10 mA
IC(ON)
On-State Collector Current
OPB852A1
OPB852A2
OPB852A3
OPB853A1
OPB853A2
OPB853A3
1.0
2.0
4.0
2.5
5.0
10.0
-
-
-
-
-
-
-
-
-
-
-
-
mA
mA
mA
mA
mA
mA
VCE = 5 V, IF = 20 mA
VCE = 5 V, IF = 20 mA
VCE = 5 V, IF = 20 mA
VCE = 1.5 V, IF = 5 mA
VCE = 1.5 V, IF = 5 mA
VCE = 1.5 V, IF = 5 mA
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
Slotted Optical Switch
OPB852A1, OPB852A2, OPB852A3
OPB853A1, OPB853A2, OPB853A3
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.3 12/09
Page 3 of 3
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displa ce m ent Distan c e (inches)
Typical I
C(ON)
Response (mA)
Right to Left
Left to Right
Top to Bottom
OPB852 & OP853 - Flag Next to Emitter
OPB820S10
Flag
in
Middle
of
Slot
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)
Typical I
C(ON)
Response (mA)
Right to Left
Left to Right
Top to Bottom
OPB852 & OPB853 - Flag in Middle of Slot
g
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)
Typical I
C(ON)
Response (mA)
Right to Left
Left to Right
Top to Bottom
OPB852 & OPB853 - Flag Next to Sensor
Emitter
Sensor
Left to Right Right to Left
0Width
Top to Bottom
0
