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Slotted Optical Switch
OPB120A, OPB120B, OPB121A, OPB121B
OPB122A, OPB122B, OPB123A, OPB123B
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 B 08/2011
Page 1 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Features:
" Choice of output configuration
" Printed circuit board mounting
" Opaque plastic housing
" Low profile
" 0.080 (2.03 mm) wide slot
" 0.275 (6.99 mm) lead spacing
Description:
The OPB120 through OPB123 devices consist of an infrared emitting diode and a Photologic?sensor (which is a
monolithic integrated circuit that incorporates a linear amplifier and a Schmitt Trigger). The OPB120 series have
an LED and Photologic?sensor mounted on opposite sides of a 0.080 (2.03 mm) wide gap of an opaque
housing. The OPB12_A series have a molded 0.040 (1.02 mm) wide apertures located over both the emitter and
the Photologic?sensor. The OPB12_B seriesseries have a molded 0.040 (1.016 mm) wide apertures located
over the emitter and 0.010 (0.254 mm) over the Photologic?sensor. All devices in this series have the added
stability utilizing hysteresis built into the amplification circuitry.
The electrical output can be specified as either buffered Totem-Pole (OPB 120A, OPB120B), buffered Open-
Collector (OPB121A, OPB121B), Inverted Totem-Pole (OPB122A, OPB122B), or Inverted Open-Collector
(OPB123A, OPB123B).
Custom electrical, wire and cabling and connectors are available. Contact your local representative or OPTEK for
more information.
Product Photo Here
RoHS
Applications:
" Mechanical switch
replacement
" Speed indication
(tachometer)
" Mechanical limit
indication
" Edge sensing
" Object sensing
Ordering Information
Part
Number
Sensor
Photologic?
Aperture
Emitter/
Sensor
OPB120A
0.04" / 0.04"
OPB120B
0.04" / 0.01"
OPB121A
Open-Collector
0.04" / 0.04"
OPB121B
0.04" / 0.01"
OPB122A
Inverted Totem-
Pole
0.04" / 0.04"
OPB122B
0.04" / 0.01"
OPB123A
Inverted Open-
Collector
0.04" / 0.04"
OPB123B
0.04" / 0.01"
Totem-Pole
Pin # Description
1
Cathode
2
Anode
3
V
CC
4
Output
5
Ground
DIMENSIONS ARE IN:
INCHES
[ MILLIMETERS]