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
R 17.866
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. 708-5553
Mfr. Part No.TCST2103
BrandVishay
R 25.152
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. 908-7132
Mfr. Part No.OPB810W51Z
BrandOptek
R 53.31
Each
units
Transistor - - - Panel Mount Wire - 30.99 x 6.35 x 15.63mm 15.63mm 30.99mm +80°C -40°C 9.53mm 6.35mm
RS stock no. 219-2511
Mfr. Part No.EE-SX1070
BrandOmron
R 32.69
Each
units
Phototransistor 1 4000ns 4000ns Through Hole - 4 17.7 x 6 x 10.7mm 10.7mm 17.7mm +95°C -25°C 8mm 6mm
RS stock no. 666-6530
Mfr. Part No.GP1S53J000F
BrandSharp
R 17.056
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. 908-7157
Mfr. Part No.OPB821S5Z
BrandOptek
R 70.75
Each
units
Transistor - - - Free Hanging Wire - 15.24 x 6.35 x 8.89mm 8.89mm 15.24mm +85°C -40°C 2.03mm 6.35mm
RS stock no. 178-1534
Mfr. Part No.GP1A52LRJ00F
BrandSharp
R 12.055
Each (In a Bag of 100)
units
Photologic, Pull Up 1 0.1µs 0.05µs Through Hole - 5 12.2 x 5 x 10mm 10mm 12.2mm +85°C -25°C 3mm 5mm
RS stock no. 666-6482
Mfr. Part No.GP1A52LRJ00F
BrandSharp
R 19.045
Each (In a Pack of 2)
units
Photologic, Pull Up 1 0.1µs 0.05µs Through Hole - 5 12.2 x 5 x 10mm 10mm 12.2mm +85°C -25°C 3mm 5mm
RS stock no. 666-6514
Mfr. Part No.GP1S093HCZ0F
BrandSharp
R 7.277
Each (In a Pack of 10)
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. 178-5031
Mfr. Part No.GP1S093HCZ0F
BrandSharp
R 5.231
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. 908-7069
Mfr. Part No.OPB390T51Z
BrandOptek
R 79.33
Each
units
Transistor - - - 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. 666-6511
Mfr. Part No.GP1S092HCPIF
BrandSharp
R 9.304
Each (In a Pack of 10)
units
Phototransistor 1 50µs 50µs Surface Mount SMD 4 2.6 x 4.5 x 2.9mm 2.9mm 2.6mm +85°C -25°C 2mm 4.5mm
RS stock no. 178-5082
Mfr. Part No.GP1S092HCPIF
BrandSharp
R 5.017
Each (On a Reel of 2000)
units
Phototransistor 1 50µs 50µs Surface Mount SMD 4 2.6 x 4.5 x 2.9mm 2.9mm 2.6mm +85°C -25°C 2mm 4.5mm
RS stock no. 455-0868
Mfr. Part No.OPB625
BrandOptek
R 43.14
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. 908-7071
Mfr. Part No.OPB492T11Z
BrandOptek
R 61.27
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. 170-0773
Mfr. Part No.OPB625
BrandOptek
R 46.907
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. 219-2533
Mfr. Part No.EE-SX1041
BrandOmron
R 26.70
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. 908-7217
Mfr. Part No.OPB943W51Z
BrandOptek
R 66.77
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
R 4.485
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. 908-7242
Mfr. Part No.OPB990T11Z
BrandOptek
R 77.25
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