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. 145-1801
Mfr. Part No.TCST1300
BrandVishay
SGD1.79
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. 818-1491
Mfr. Part No.EE-SX670A
BrandOmron
SGD46.21
Each
units
- - - - - - - - - - - - - -
RS Stock No. 821-0139
Mfr. Part No.EE-SX674A
BrandOmron
SGD56.47
Each
units
- - - - - - - - - - - - - -
RS Stock No. 174-2530
Mfr. Part No.TCUT1800X01
BrandVishay
SGD4.61
Each (In a Pack of 5)
units
Phototransistor 4 9µs 16µs Surface Mount SMD 10 5.7 x 5.9 x 7.1mm 7.1mm 5.7mm +105°C -40°C 3mm 5.9mm
RS Stock No. 908-7255
Mfr. Part No.OPB993L11Z
BrandOptek
SGD8.47
Each
units
Transistor - 70ns 70ns Panel Mount Wire - 18.47 x 6.35 x 15.63mm 15.63mm 18.47mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 180-7429
Mfr. Part No.TCST5250
BrandVishay
SGD2.283
Each (In a Tube of 30)
units
- - - - - - - - - - - - - -
RS Stock No. 908-7135
Mfr. Part No.OPB802W55Z
BrandOptek
SGD6.70
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. 880-2003
Mfr. Part No.OPB830W55Z
BrandOptek
SGD8.18
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. 170-0952
Mfr. Part No.OPB829CZ
BrandOptek
SGD6.901
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. 180-7971
Mfr. Part No.TCST1030
BrandVishay
SGD1.17
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 666-6511
Mfr. Part No.GP1S092HCPIF
BrandSharp
SGD0.977
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. 171-3808
Mfr. Part No.OPB680
BrandOptek
SGD6.50
Each
units
Phototransistor 1 - - Through Hole - 4 12.19 x 10.92 x 8.89mm 8.89mm 12.19mm +100°C -40°C - 10.92mm
RS Stock No. 666-6473
Mfr. Part No.GP1A51HRJ00F
BrandSharp
SGD3.00
Each (In a Pack of 5)
units
Photologic, Pull Up 1 0.1µs 0.05µs Screw Mount - 5 18 x 12.2 x 10mm 10mm 18mm +85°C -25°C 3mm 12.2mm
RS Stock No. 455-0874
Mfr. Part No.OPB460T11
BrandOptek
SGD4.34
Each
units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Screw Mount - 5 24.89 x 6.6 x 11.05mm 11.05mm 24.89mm +85°C -40°C 3.18mm 6.6mm
RS Stock No. 880-2040
Mfr. Part No.OPB992T51Z
BrandOptek
SGD8.22
Each
units
- 1 70ns 70ns Screw Mount - 5 12.32 x 6.35 x 10.8mm 10.8mm 12.32mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 180-8021
Mfr. Part No.TCST5250
BrandVishay
SGD2.396
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
SGD9.36
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. 161-2047
Mfr. Part No.TCUT1600X01
BrandVishay
SGD1.17
Each (On a Reel of 1300)
units
Transistor 2 9µs 16µs Surface Mount SMD 6 5.5 x 4 x 5.7mm 5.7mm 5.5mm 105°C -40°C - 4mm
RS Stock No. 455-0896
Mfr. Part No.OPB916BZ
BrandOptek
SGD8.22
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. 183-7469
Mfr. Part No.EESX4320
BrandOmron
SGD5.032
Each (In a Pack of 2000)
units
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