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. 818-1494
Mfr. Part No.EE-SX672A
BrandOmron
€19.19
Each
units
- - - - - - - - - - - - - -
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. 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. 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. 919-0165
Mfr. Part No.TCST1103
BrandVishay
€0.781
Each (In a Tube of 85)
units
Phototransistor 1 10 μ 8µs Through Hole - 4 11.9 x 6.3 x 11.1mm 11.1mm 11.9mm 85°C -55°C 3.1mm 6.3mm
RS Stock No. 708-5538
Mfr. Part No.TCST1103
BrandVishay
€1.278
Each (In a Pack of 5)
units
Phototransistor 1 10µs 8µs Through Hole - 4 11.9 x 6.3 x 11.1mm 11.1mm 11.9mm +85°C -55°C 3.1mm 6.3mm
RS Stock No. 821-0123
Mfr. Part No.EE-SX671P
BrandOmron
€18.93
Each
units
- - - - - - - - - - - - - -
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. 700-3996
Mfr. Part No.RPI-579N1
BrandROHM
€1.05
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. 301-8442
Mfr. Part No.OPB620
BrandOptek
€1.38
Each
units
Phototransistor 1 - - Through Hole - 4 10.16 x 5.59 x 9.52mm 9.52mm 10.16mm +100°C -40°C 4.83mm 5.59mm
RS Stock No. 169-0523
Mfr. Part No.RPI-579N1
BrandROHM
€0.389
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. 818-1485
Mfr. Part No.EE-SX671A
BrandOmron
€13.69
Each
units
- - - - - - - - - - - - - -
RS Stock No. 124-6794
Mfr. Part No.RPI-246
BrandROHM
€0.313
Each (In a Pack of 15)
units
Phototransistor 1 10µs 10µs Through Hole - 4 5 x 4.2 x 5.2mm 5.2mm 5mm +85°C -25°C 2mm 4.2mm
RS Stock No. 710-3816
Mfr. Part No.TCPT1300X01
BrandVishay
€1.516
Each (In a Pack of 5)
units
Phototransistor 1 20µs 30µs Surface Mount SMD 6 4 x 5 x 4mm 4mm 4mm +85°C -40°C 3mm 5mm
RS Stock No. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
€4.06
Each
units
Phototransistor 1 4000ns 4000ns Through Hole - 4 25.4 x 6.35 x 11.7mm 11.7mm 25.4mm +85°C -25°C 3.6mm 6.35mm
RS Stock No. 145-2215
Mfr. Part No.TCST1202
BrandVishay
€1.108
Each (In a Tube of 85)
units
Phototransistor 1 10µs 8µs Through Hole - 4 11.9 x 6.3 x 11.1mm 11.1mm 11.9mm +85°C -55°C 3.1mm 6.3mm
RS Stock No. 136-0653
Mfr. Part No.TCPT1300X01
BrandVishay
€0.582
Each (On a Reel of 2000)
units
Transistor 2 20µs 30µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +105°C -40°C 3mm 4mm
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. 453-0842
Mfr. Part No.H21A6
BrandIsocom
€1.552
Each (In a Pack of 5)
units
Phototransistor 1 8µs 50µs Screw Mount - 4 25.7 x 6.6 x 11.1mm 11.1mm 25.7mm +85°C -25°C 3mm 6.6mm
RS Stock No. 219-2577
Mfr. Part No.EE-SG3B
BrandOmron
€4.17
Each
units
Phototransistor 1 4000ns 4000ns Through Hole - 4 25.4 x 6.35 x 11.7mm 11.7mm 25.4mm +85°C -25°C 3.6mm 6.35mm
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