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. 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. 818-7528
Mfr. Part No.TCST2202
BrandVishay
SGD1.693
Each (In a Pack of 10)
units
Phototransistor 1 10µs 8µs Through Hole Leaded 4 24.5 x 6.3 x 10.8mm 10.8mm 24.5mm +85°C -55°C - 6.3mm
RS Stock No. 455-8020
Mfr. Part No.OPB360T51
BrandOptek
SGD3.57
Each
units
Phototransistor 1 - - Screw Mount - 4 24.61 x 6.35 x 10.8mm 10.8mm 24.61mm +85°C -40°C 3.18mm 6.35mm
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. 908-7208
Mfr. Part No.OPB933W51Z
BrandOptek
SGD8.53
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. 170-0773
Mfr. Part No.OPB625
BrandOptek
SGD3.757
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. 666-6514
Mfr. Part No.GP1S093HCZ0F
BrandSharp
SGD0.66
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. 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. 708-5553
Mfr. Part No.TCST2103
BrandVishay
SGD2.836
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. 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. 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. 174-2513
Mfr. Part No.TCUT1800X01
BrandVishay
SGD1.997
Each (On a Reel of 1100)
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. 908-7071
Mfr. Part No.OPB492T11Z
BrandOptek
SGD6.71
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. 616-5686
Mfr. Part No.KRB031
BrandKingbright
SGD1.904
Each (In a Pack of 5)
units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 6 x 5mm 5mm 4mm +85°C -40°C 3mm 6mm
RS Stock No. 124-6791
Mfr. Part No.RPI-0226
BrandROHM
SGD1.071
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. 908-7214
Mfr. Part No.OPB942W55Z
BrandOptek
SGD8.31
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. 219-2555
Mfr. Part No.EE-SX1042
BrandOmron
SGD4.01
Each
units
Transistor 1 4000ns 4000ns Through Hole - 4 14 x 5 x 14.5mm 14.5mm 14mm +85°C -25°C 5mm 5mm
RS Stock No. 919-0177
Mfr. Part No.TCST2300
BrandVishay
SGD1.87
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. 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. 176-0819
Mfr. Part No.EE-SX1350
BrandOmron
SGD1.459
Each (On a Reel of 400)
units
Phototransistor 1 11µs 14µs Surface Mount SMD 6 9 x 4 x 9mm 9mm 9mm +85°C -30°C 5mm 4mm
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