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 09/2011
Page 1 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Description:
Each OPB820 and OPB821Z device consists of an infrared emitting diode (LED, 890 nm center wavelength) and
a NPN silicon phototransi stor mounted in a low-cost black plastic housing on op posite sides of an 0.080” (2.03
mm) wide slot. Each device in this series has a 0.040” (1.02 mm) wide aperture located in front of the infrared
diode. Phototransistor switching occurs when an opaque object passes through the slot.
Devices are offered with 0.275” (6.96 mm) lead spacing for PCBoard mounting (OPB820) or 24” (609 mm) 26
AWG wire leads (OPB821Z).
Custom electrical, wire an d cabling and connectors a re available. Contact your local rep re sentative or OPTEK for
more information.
Features:
• Non-contact switching
• Four standard aperture sizes for high resolution
• Low profile
• 0.080” (2.03 mm) wide, 0.250” (8.89 mm) deep slot
• Choice of PCBoard or wire mountings
Product Photo Here
RoHS
OPB821Z
Applications:
• Non-contact object sensing
• Assembly line automation
• Machine automation
• Equipment safety
• Machine safety
Ordering Information
Part
Number LED Peak
Wavelength
Sensor Slot Width /
Depth Aperture
Emitter/Sensor Lead Length /
Spacing
OPB820
890 nm Transistor 0.080" /
0.255”
0.04"/ 0.04"
0.425" / 0.275"
OPB820S10 0.04"/ 0.01"
OPB820S5 0.04"/ 0.005"
OPB820S3 0.04"/ 0.003"
OPB821Z 0.040"/ 0.040"
24"/26 AWG
Wire
OPB821S10Z 0.040"/ 0.010"
OPB821S5Z 0.040"/ 0.005"
OPB821S3Z 0.040"/ 0.003"
OPB820
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 09/2011
Page 2 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Pin # Description Pin # Description
4 Cathode 2 Collector
3 Anode 1 Emitter
Color/Pin # Description Color/Pin # Description
Green-3 Cathode White-2 Collector
Orange-4 Anode Blue-1 Emitter
Package Drawing
OPB820 Package Drawing
OPB821
3 1
4 2
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.
4 1
3 2
DIMENSIONS ARE IN:
INCHES
[ MILLIMETERS]
24.0 [609]
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 09/2011
Page 3 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Electrical Characteristics (TA = 25°C unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
Input Diode (See OP245 for additional information)
VF Forward Voltage - - 1.7 V IF = 20 mA
IR Reverse Current - - 100 µA VR = 2 V
Output Phototransistor (See OP555 for additional information)
V(BR)CEO Collector-Emitter Breakdown Voltage 30 - - V IC = 100 mA
V(BR)ECO Emitter-Collector Breakdown Voltage 5 - - V IE = 100 µA
ICEO Collector-Emitter Dark Current - - 100 nA VCE = 10 V, IF = 0, IE = 0
Coupled
VCE(SAT)
Collector-Emitter Saturation Voltage
OPB820, OPB821Z
OPB820S3, OPB821S3Z
OPB820S5, OPB821S5Z
OPB820S10, OPB821S10Z
-
-
-
-
-
-
-
-
0.4
0.4
0.4
0.4
V
V
V
V
IC = 250 µA, IF = 20 mA
IC = 40 µA, IF = 20 mA
IC = 150 µA, IF = 20 mA
IC = 250 µA, IF = 20 mA
IC(ON)
On-State Collector Current
OPB820, OPB821Z
OPB820S3, OPB821S3Z
OPB820S5, OPB821S5Z
OPB820S10, OPB821S10Z
500
60
300
400
-
-
-
-
-
-
-
-
µA
µA
µA
µA
VCE = 5 V, IF = 20 mA
VCE = 5 V, IF = 20 mA
VCE = 5 V, IF = 20 mA
VCE = 5 V, IF = 20 mA
Absolute Maximum Ratings (TA=25°C unless otherwi se noted)
Storage and Operating Temperature -40°C to +85°C
Lead Soldering Temperature ( 1/16 inch [1.6 mm] from case for 5 seconds with soldering iron) (1) 260°C
Input Diode
Continuous For ward Current 50 mA
Peak Forward Current (1µs pulse width, 300 pps) 1 A
Reverse Voltage 2 V
Power Dissipation (2) 100 mW
Output Phototransistor
Collector-Emitter Voltage 30 V
Emitter-Collector Voltage 5 V
Power Dissipation (2) 100 mW
Notes:
(1) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
(2) For OPB820, derate linearly 1.67 mW/° C above 25° C. For OPB821Z, derate linearly 1.82 mW/° C above 25° C.
(3) Methanol or isopropanol are recommended as cleaning agents. Plastic housing is soluble in chlorinated hydrocarbons and
ketones.
(4) All parameters were tested using pulse technique.
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 09/2011
Page 4 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPB820 - Flag Next to Emitter
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)
Normalized IC(ON) Response
To
p
to Bottom
Right to LeftLeft to Right
Emitter
Sensor
Left to Right Right to Left
0Width
Top to Bottom
0
OPB820 - Flag next to Sensor
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)
Normalized I
C(ON)
Response
To
p
to Bottom
Right to LeftLeft to Right
OPB820 - 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)
Normalized I
C(ON)
Response
To
p
to
Right to LeftLeft to R igh t
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 09/2011
Page 5 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPB82 0S 3 - Fl ag in Middle of S lot
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)
To
p
to Bottom
Left to Right Right to Left
OPB820S3 - Flat Next to Sensor
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)
Left to Right Right to Left
To
p
to Bottom
OPB820S3 - Flag Next to Emitter
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)
To
p
to Bottom
Right to LeftLeft to Right
Emitter
Sensor
Left to Right Right to Left
0Width
Top to Bottom
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 09/2011
Page 6 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPB820S5 - Flag Next to Emitter
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)
Left to Right Right to L e ft
To
p
to
OPB820S5 - Fla g Nex t to Se ns or
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)
Left to Ri
g
ht Ri
g
ht to Left
To
to
OPB820S5 - Flag in M iddle 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)
Left to Right Right to Left
To
to
Emitter
Sensor
Left to Right Right to Left
0Width
Top to Bottom
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 09/2011
Page 7 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPB820S10 - Flag Next to Sensor
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)
Left to Ri
g
ht Ri
g
ht to Left
To
p
to Bottom
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)
Left to Right Right to Left
To
to
OPB820S10 - Flag Next to Emitter
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)
Left to Ri
g
ht Ri
g
ht to Left
To
to
Emitter
Sensor
Left to Right Right to Left
0Width
Top to Bottom
0