Slotted Optical Switches

Slotted optical switches (also called opto switches) are devices that provide status indications (on or off) when light beams are interrupted in various types of instruments, systems and equipment.

The switches contain phototransistors, which are illuminated by infrared light from the LEDs. The illumination causes the phototransistors to conduct. If objects are then placed into the slots between the transistors and the LEDs, the interruption of the light beams causes the transistors to switch off.

Optical slotted switches may also house rotating discs with holes around the rims. These holes spin within the light paths of the switches to create on and off pulses and direct the speed of the spinning discs.

What are slotted optical switches used for?

Slotted optical switches are used in assembly line production systems, machine automation and machine safety indicators.

The switches are standard in computer peripherals like printers, where the projection images get interrupted when they reach the end of their travel.

Types of slotted optical switches

Slotted optical switches are classified by their output mechanisms (buffers, inverters, interrupters), mounting types (through hole, panel, surface) and the number of pins located on the switches.


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Description Price Output Device Number of Channels Typical Rise Time Typical Fall Time Mounting Type Package Type Number of Pins Dimensions Height Length Maximum Operating Temperature Minimum Operating Temperature Slot Width Width
RS Stock No. 908-7166
Mfr. Part No.OPB831W55Z
BrandOptek
€3.80
Each
units
Transistor - - - Panel Mount Wire - 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +80°C -40°C 3.18mm 12.95mm
RS Stock No. 170-0776
Mfr. Part No.OPB916BZ
BrandOptek
€4.54
Each (In a Bag of 25)
units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Screw Mount - 5 30.73 x 6.48 x 19.3mm 19.3mm 30.73mm +80°C -40°C 5.08mm 6.48mm
RS Stock No. 455-0896
Mfr. Part No.OPB916BZ
BrandOptek
€4.62
Each
units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Screw Mount - 5 30.73 x 6.48 x 19.3mm 19.3mm 30.73mm +80°C -40°C 5.08mm 6.48mm
RS Stock No. 908-7217
Mfr. Part No.OPB943W51Z
BrandOptek
€4.77
Each
units
Transistor - 70ns 70ns Panel Mount Wire - 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +70°C -40°C 3.18mm 12.95mm
RS Stock No. 170-0952
Mfr. Part No.OPB829CZ
BrandOptek
€3.148
Each (In a Bag of 100)
units
- 1 - - Screw Mount - 4 24.64 x 6.35 x 10.03mm 10.03mm 24.64mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 908-7255
Mfr. Part No.OPB993L11Z
BrandOptek
€4.87
Each
units
Transistor - 70ns 70ns Panel Mount Wire - 18.47 x 6.35 x 15.63mm 15.63mm 18.47mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 880-1993
Mfr. Part No.OPB829CZ
BrandOptek
€3.285
Each (In a Pack of 2)
units
- 1 - - Screw Mount - 4 24.64 x 6.35 x 10.03mm 10.03mm 24.64mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 908-7150
Mfr. Part No.OPB821Z
BrandOptek
€4.44
Each
units
Transistor - - - Through Hole Wire - 15.24 x 6.35 x 8.89mm 8.89mm 15.24mm +85°C -40°C 2.03mm 6.35mm
RS Stock No. 908-7198
Mfr. Part No.OPB930W55Z
BrandOptek
€4.61
Each
units
Transistor - 70ns 70ns Panel Mount Wire - 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +70°C -40°C 3.18mm 12.95mm
RS Stock No. 908-7264
Mfr. Part No.OPB993T51Z
BrandOptek
€4.62
Each
units
Transistor - 70ns 70ns Panel Mount Wire - 24.63 x 6.35 x 15.63mm 15.63mm 24.63mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 880-2012
Mfr. Part No.OPB840L51
BrandOptek
€2.375
Each (In a Pack of 2)
units
Transistor 1 - - Through Hole - 4 23.75 x 6.35 x 10.54mm 10.54mm 23.75mm +85°C -40°C 3.18mm 6.35mm
RS Stock No. 880-2003
Mfr. Part No.OPB830W55Z
BrandOptek
€3.89
Each
units
Transistor 1 - - Screw Mount - 4 23.75 x 6.35 x 10.54mm 10.54mm 23.75mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 880-2028
Mfr. Part No.OPB841W55Z
BrandOptek
€4.05
Each
units
- 1 - - Screw Mount - 4 23.75 x 6.35 x 10.54mm 10.54mm 23.75mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 170-0765
Mfr. Part No.OPB815L
BrandOptek
€2.332
Each (In a Bag of 25)
units
Phototransistor 1 - - Screw Mount - 4 32 x 6.6 x 14.35mm 14.35mm 32mm +80°C -40°C 9.53mm 6.6mm
RS Stock No. 880-2031
Mfr. Part No.OPB992P51Z
BrandOptek
€4.52
Each
units
- 1 70ns 70ns Screw Mount - 5 18.47 x 6.35 x 10.8mm 10.8mm 18.47mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 170-0964
Mfr. Part No.OPB990T51Z
BrandOptek
€4.54
Each (In a Bag of 25)
units
- 1 70ns 70ns Screw Mount - 5 24.63 x 6.35 x 10.8mm 10.8mm 24.63mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 880-2015
Mfr. Part No.OPB840W11Z
BrandOptek
€5.01
Each
units
Transistor 1 - - Screw Mount - 4 23.75 x 6.35 x 10.54mm 10.54mm 23.75mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 908-7071
Mfr. Part No.OPB492T11Z
BrandOptek
€3.86
Each
units
Transistor - 50ns 50ns Panel Mount Wire - 24.63 x 6.35 x 15.25mm 15.25mm 24.63mm +85°C -40°C 3.3mm 6.35mm
RS Stock No. 303-1192A
Mfr. Part No.OPB365T55
BrandOptek
€2.846
Each (In a Pack of 25)
units
Phototransistor 1 10µs - Screw Mount - 4 24.61 x 6.35 x 10.8mm 10.8mm 24.61mm +85°C -40°C 3.18mm 6.35mm
RS Stock No. 194-4024
Mfr. Part No.OPB815L
BrandOptek
€2.38
Each
units
Phototransistor 1 - - Screw Mount - 4 32 x 6.6 x 14.35mm 14.35mm 32mm +80°C -40°C 9.53mm 6.6mm