Slotted Optical Switch
OPB857Z
Features:
Three wires for economy in electrical connection
Water resistant, no optical openings in upper plastic body
Internal narrow aperture for high motion resolution
Description:
OPB857Z is a non-contact optical switch with a NPN silicon phototransistor and infrared Light Emitting Diode (LED) which
are mounted on opposite sides of a 0.150” ( 3.8 mm) wide slot.
The device upper body is a single molded piece IR transparent plastic that is tinted to reduce ambient light interference and
offers water resistance as well as dirt/dust protection. The phototransistor has a internal aperture that offers good optical
resolution. LED emissions are near-infrared (850 – 940nm).
Applications:
Non-contact object sensing
Assembly line automation
Machine automation
Equipment security
Machine safety
Wire Color
Red
Brown
Black
Description
Collector
Anode
Common
RoHS
Notes:
(1) Wire is 26AWG, UL Rated PVC insulation.
(2) Ideal torque for bolt or screw 0,45 to 0,68 Nm ( 4 to 6 Lb-in ).
(3) When using a thread lock compound, ND Industries ”ND Vibra-Tite
®
Formula 3” will avoid stress cracking plastic.
(4) Plastic is soluble in chlorinated hydrocarbons and ketones. Methanol or isopropanol are recommended as cleaning agents.
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
© TT electronics plc
TT Electronics | Optek Technology, Inc.
1645 Wallace Drive, Ste. 130, Carrollton, TX USA 75006 |Ph: +1 972 323 2200
www.ttelectronics.com | sensors@ttelectronics.com
Issue B 11/2016
Page 1
Slotted Optical Switch
OPB857Z
Electrical Specifications
Absolute Maximum Ratings
Storage & Operating Temperature Range
Input Diode
Input Diode Power Dissipation
Input Diode Forward D.C. Current, T
A
= 25°C
Input Diode Peak Forward Pulse Current, T
A
= 25°C (1µs pulse width, 300pps)
Input Diode Reverse D.C. Voltage, T
A
= 25°C
Phototransistor
Power Dissipation
Collector - Emitter Voltage
Emitter - Collector Voltage
100 mW
( 5)
30V
5.0V
100 mW
( 5)
50 mA
( 5)
1A
2V
-40°C to +80° C
Electrical Characteristics
( T
A
= 25°C )
SYMBOL
PARAMETER
MIN
TYP
MAX
UNITS
TEST CONDITIONS
Input Diode
(see OP140 or OP240 for additional information)
V
F
I
R
Forward Voltage
Reverse Current
-
-
-
-
1.70
100
V
µA
I
F
= 20 mA
V
R
= 2 V
Output Phototransistor
(see OP550 for additional information)
V
(BR)CEO
V
(BR)ECO
I
CEO
Coupled
V
CE(SAT)
I
C(ON)
Collector-Emitter Saturation Voltage
On-State Collector Current
-
1.5
-
-
0.40
17.0
V
mA
I
C
= 1.50 mA, I
F
= 20 mA
V
CE
= 10 V, I
F
= 20 mA
Collector-Emitter Breakdown Voltage
Emitter-Collector Breakdown Voltage
Collector Dark Current
30
5.0
-
-
-
-
-
-
100
V
V
nA
I
C
= 1 mA, E
E
= 0
I
E
= 100 µA, E
E
= 0
V
CE
= 10 V, I
F
= 0, E
E
= 0
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
© TT electronics plc
TT Electronics | Optek Technology, Inc.
1645 Wallace Drive, Ste. 130, Carrollton, TX USA 75006 |Ph: +1 972 323 2200
www.ttelectronics.com | sensors@ttelectronics.com
Issue B 11/2016
Page 2
Slotted Optical Switch
OPB857Z
Performance
OPB857Z
- Flag Next to Emitter
OPB857Z
- Flag Next to LED
1.2
Top to Bottom
1.0
1.0
1.2
Top to Bottom
OPB857Z
Flag Next to Sensor
OPB817Z
-
-
Flag Next to PTX
Typical I
C(ON)
Response
0.8
Typical I
C(ON)
Response
0.8
Left to Right
0.6
Right to Left
Left to Right
Right to Left
0.6
0.4
0.4
0.2
0.2
0.0
0.00
0.05
0.10
0.15
0.20
0.25
0.0
0.00
0.05
0.10
0.15
0.20
0.25
Distance (inches)
Distance (inches)
OPB857Z - Flag in Middle of Slot
1.2
Top to Bottom
1.0
0
Top to Bottom
Typical I
C(ON)
Response
0.8
Left to Right
0.6
Emitter
Left to Right
Right to Left
Right to Left
LED Side
0.4
Sensor
0.2
0
Width
PTX Side
0.0
0.00
0.05
0.10
0.15
0.20
0.25
Distance (inches)
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
© TT electronics plc
TT Electronics | Optek Technology, Inc.
1645 Wallace Drive, Ste. 130, Carrollton, TX USA 75006 |Ph: +1 972 323 2200
www.ttelectronics.com | sensors@ttelectronics.com
Issue B 11/2016
Page 3
