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. 919-0174
Mfr. Part No.TCST2103
BrandVishay
SGD1.693
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
RS Stock No. 178-5031
Mfr. Part No.GP1S093HCZ0F
BrandSharp
SGD0.547
Each (In a Tube of 100)
units
Phototransistor 1 50µs 50µs Through Hole - 4 2.6 x 4.5 x 2.9mm 2.9mm 2.6mm +85°C -25°C 2mm 4.5mm
RS Stock No. 170-0963
Mfr. Part No.OPB992P51Z
BrandOptek
SGD7.885
Each (In a Bag of 100)
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. 124-6791
Mfr. Part No.RPI-0226
BrandROHM
SGD1.479
Each (In a Pack of 15)
units
Phototransistor 1 30µs 30µs Surface Mount SMD 4 4.4 x 2.7 x 2.8mm 2.8mm 4.4mm +85°C -30°C 2mm 2.7mm
RS Stock No. 170-0957
Mfr. Part No.OPB840L51
BrandOptek
SGD4.213
Each (In a Box of 25)
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. 880-2012
Mfr. Part No.OPB840L51
BrandOptek
SGD4.305
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. 455-0868
Mfr. Part No.OPB625
BrandOptek
SGD3.34
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. 708-5553
Mfr. Part No.TCST2103
BrandVishay
SGD2.65
Each (In a Pack of 5)
units
Phototransistor 1 10µs 8µs Through Hole - 4 24.5 x 6.3 x 11.1mm 11.1mm 24.5mm +85°C -55°C 3.1mm 6.3mm
RS Stock No. 455-0925
Mfr. Part No.SG211
BrandKodenshi
SGD3.518
Each (In a Pack of 5)
units
Phototransistor 1 50µs 50µs Through Hole - 4 5 x 4 x 5.2mm 5.2mm 5mm +85°C -20°C 2mm 4mm
RS Stock No. 173-0304
Mfr. Part No.OPB900W55Z
BrandOptek
SGD9.282
Each (In a Bag of 92)
units
Transistor 1 70ns 70ns Screw Mount - 5 30.99 x 6.35 x 10.8mm 10.8mm 30.99mm +70°C -40°C 9.53mm 6.35mm
RS Stock No. 880-2031
Mfr. Part No.OPB992P51Z
BrandOptek
SGD8.22
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. 666-6530
Mfr. Part No.GP1S53J000F
BrandSharp
SGD1.88
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. 880-2019
Mfr. Part No.OPB840W51Z
BrandOptek
SGD7.33
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. 700-3996
Mfr. Part No.RPI-579N1
BrandROHM
SGD1.37
Each (In a Pack of 2)
units
Phototransistor 1 10000ns 10000ns Through Hole - 4 13.8 x 6 x 10mm 10mm 13.8mm +85°C -25°C 5mm 6mm
RS Stock No. 908-7227
Mfr. Part No.OPB972T55
BrandOptek
SGD4.90
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. 219-2533
Mfr. Part No.EE-SX1041
BrandOmron
SGD3.98
Each
units
Transistor 1 4000ns 4000ns Through Hole - 4 6 x 14.6 x 10.9mm 10.9mm 6mm +95°C -25°C 5mm 14.6mm
RS Stock No. 170-0959
Mfr. Part No.OPB840W51Z
BrandOptek
SGD7.028
Each (In a Bag of 100)
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
SGD7.22
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. 169-0523
Mfr. Part No.RPI-579N1
BrandROHM
SGD0.788
Each (In a Bag of 1000)
units
Phototransistor 1 10000ns 10000ns Through Hole - 4 13.8 x 6 x 10mm 10mm 13.8mm +85°C -25°C 5mm 6mm
RS Stock No. 788-4931
Mfr. Part No.EE-SX1046
BrandOmron
SGD4.88
Each (In a Pack of 2)
units
Phototransistor 1 4µs 4µs Through Hole - 4 - 6.5mm 10mm +85°C -25°C 3mm -