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. 219-2577
Mfr. Part No.EE-SG3B
BrandOmron
PHP210.00
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. 919-0177
Mfr. Part No.TCST2300
BrandVishay
PHP49.476
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. 169-0523
Mfr. Part No.RPI-579N1
BrandROHM
PHP18.55
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. 700-3996
Mfr. Part No.RPI-579N1
BrandROHM
PHP45.545
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. 708-5556
Mfr. Part No.TCST2300
BrandVishay
PHP101.34
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. 708-5553
Mfr. Part No.TCST2103
BrandVishay
PHP89.988
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. 919-0174
Mfr. Part No.TCST2103
BrandVishay
PHP42.145
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. 321-9291
Mfr. Part No.HOA 2005 001
BrandHoneywell
PHP602.65
Each
units
Inverter, Open-Collector with 10K Pull-Up Resistor 1 60ns 15ns Screw Mount - 5 23.75 x 12.95 x 15.62mm 15.62mm 23.75mm +70°C -40°C 3.18mm 12.95mm
RS Stock No. 170-0776
Mfr. Part No.OPB916BZ
BrandOptek
PHP255.65
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
PHP255.65
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. 666-6536
Mfr. Part No.GP1S52VJ000F
BrandSharp
PHP48.696
Each (In a Pack of 5)
units
Phototransistor 1 3µs 4µs Through Hole - 4 12.2 x 5 x 10mm 10mm 12.2mm +85°C -25°C 3mm 5mm
RS Stock No. 178-5045
Mfr. Part No.GP1S52VJ000F
BrandSharp
PHP26.989
Each (In a Bag of 1000)
units
Phototransistor 1 3µs 4µs Through Hole - 4 12.2 x 5 x 10mm 10mm 12.2mm +85°C -25°C 3mm 5mm
RS Stock No. 908-7264
Mfr. Part No.OPB993T51Z
BrandOptek
PHP256.16
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. 169-0524
Mfr. Part No.RPI-352
BrandROHM
PHP20.034
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. 788-4931
Mfr. Part No.EE-SX1046
BrandOmron
PHP144.65
Each (In a Pack of 2)
units
Phototransistor 1 4µs 4µs Through Hole - 4 - 6.5mm 10mm +85°C -25°C 3mm -
RS Stock No. 453-0836
Mfr. Part No.H21A3
BrandIsocom
PHP74.298
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. 788-4943
Mfr. Part No.EE-SX1081
BrandOmron
PHP138.60
Each (In a Pack of 5)
units
Phototransistor 1 4µs 4µs Through Hole - 4 13.7 x 5 x 10mm 10mm 13.7mm +85°C -25°C 5mm 5mm
RS Stock No. 700-3999
Mfr. Part No.RPI-352
BrandROHM
PHP34.905
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. 908-7166
Mfr. Part No.OPB831W55Z
BrandOptek
PHP214.75
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. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
PHP305.25
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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