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. 908-7217
Mfr. Part No.OPB943W51Z
BrandOptek
kr 44,17
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. 303-1192
Mfr. Part No.OPB365T55
BrandOptek
kr 29,91
Each
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. 303-1192A
Mfr. Part No.OPB365T55
BrandOptek
kr 29,408
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. 908-7179
Mfr. Part No.OPB850A
BrandOptek
kr 21,04
Each
Units
Transistor - - - Snap-In - - 21.16 x 11.6 x 14mm 14mm 21.16mm +75°C -20°C - 11.6mm
RS Stock No. 908-7138
Mfr. Part No.OPB804
BrandOptek
kr 13,679
Each (In a Pack of 10)
Units
Transistor - - - Through Hole Pin 4 12.57 x 6.35 x 11.68mm 11.68mm 12.57mm +85°C -40°C 3.94mm 6.35mm
RS Stock No. 908-7223
Mfr. Part No.OPB962N51
BrandOptek
kr 27,62
Each
Units
Transistor - 70ns 70ns Through Hole Pin 5 12.32 x 6.35 x 10.8mm 10.8mm 12.32mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 169-0524
Mfr. Part No.RPI-352
BrandROHM
kr 3,831
Each (In a Bag of 1000)
Units
Phototransistor 1 10µs 10µs Through Hole - 4 6.4 x 4.2 x 5.4mm 5.4mm 6.4mm +85°C -25°C 3mm 4.2mm
RS Stock No. 908-7205
Mfr. Part No.OPB941W51Z
BrandOptek
kr 44,77
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. 700-3999
Mfr. Part No.RPI-352
BrandROHM
kr 7,675
Each (In a Pack of 2)
Units
Phototransistor 1 10µs 10µs Through Hole - 4 6.4 x 4.2 x 5.4mm 5.4mm 6.4mm +85°C -25°C 3mm 4.2mm
RS Stock No. 666-6530
Mfr. Part No.GP1S53J000F
BrandSharp
kr 11,086
Each (In a Pack of 5)
Units
Phototransistor 1 3µs 4µs Through Hole - 4 13.7 x 5.2 x 10mm 10mm 13.7mm +85°C -25°C 5mm 5.2mm
RS Stock No. 219-2527
Mfr. Part No.EE-SX4070
BrandOmron
kr 20,14
Each
Units
Open Collector 1 - - Through Hole - 5 11 x 8 x 9.7mm 9.7mm 11mm +75°C -40°C 8mm 8mm
RS Stock No. 194-4030
Mfr. Part No.OPB815WZ
BrandOptek
kr 38,28
Each
Units
Phototransistor 1 - - Chassis Mount PCB Module - - - - +80°C -40°C 9.53mm 9.53mm
RS Stock No. 908-7144
Mfr. Part No.OPB815WZ
BrandOptek
kr 38,68
Each
Units
Transistor - - - Free Hanging Wire - 31.75 x 3.18 x 14.1mm 14.1mm 31.75mm +80°C -40°C 9.53mm 3.18mm
RS Stock No. 455-0868
Mfr. Part No.OPB625
BrandOptek
kr 21,93
Each
Units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 30ns 30ns Through Hole - 5 5.58 x 10.16 x 9.52mm 9.52mm 5.58mm +100°C -40°C 4.83mm 10.16mm
RS Stock No. 908-7220
Mfr. Part No.OPB960T51
BrandOptek
kr 27,22
Each
Units
Transistor - 70ns 70ns Through Hole Pin 5 24.63 x 6.35 x 10.8mm 10.8mm 24.63mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 455-0919
Mfr. Part No.OPB917BZ
BrandOptek
kr 82,85
Each
Units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Through Hole - 5 30.73 x 6.35 x 25.65mm 25.65mm 30.73mm +85°C -40°C 5.08mm 6.35mm
RS Stock No. 177-4906
Mfr. Part No.EE-SX3081
BrandOmron
kr 19,657
Each (In a Bag of 200)
Units
Phototransistor 1 3µs 20µs Through Hole - 5 13.7 x 5 x 10mm 10mm 13.7mm +75°C -40°C 5mm 5mm
RS Stock No. 788-4959
Mfr. Part No.EE-SX3081
BrandOmron
kr 33,55
Each (In a Pack of 2)
Units
Phototransistor 1 3µs 20µs Through Hole - 5 13.7 x 5 x 10mm 10mm 13.7mm +75°C -40°C 5mm 5mm
RS Stock No. 170-0773
Mfr. Part No.OPB625
BrandOptek
kr 20,761
Each (In a Tube of 100)
Units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 30ns 30ns Through Hole - 5 5.58 x 10.16 x 9.52mm 9.52mm 5.58mm +100°C -40°C 4.83mm 10.16mm
RS Stock No. 919-0174
Mfr. Part No.TCST2103
BrandVishay
kr 7,798
Each (In a Tube of 85)
Units
Phototransistor 1 10 μ 8µs Through Hole - 4 24.5 x 6.3 x 11.1mm 11.1mm 24.5mm 85°C -55°C 3.1mm 6.3mm
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