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. 170-0961
Mfr. Part No.OPB880P51Z
BrandOptek
HK$37.368
Each (In a Bag of 100)
units
- 1 - - Screw Mount - 4 18.47 x 6.35 x 15.75mm 15.75mm 18.47mm +85°C -40°C 3.3mm 6.35mm
RS Stock No. 908-7150
Mfr. Part No.OPB821Z
BrandOptek
HK$46.45
Each
units
Transistor - - - Through Hole Wire - 15.24 x 6.35 x 8.89mm 8.89mm 15.24mm +85°C -40°C 2.03mm 6.35mm
RS Stock No. 219-2511
Mfr. Part No.EE-SX1070
BrandOmron
HK$20.19
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. 666-6536
Mfr. Part No.GP1S52VJ000F
BrandSharp
HK$10.346
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. 455-0880
Mfr. Part No.OPB830L51
BrandOptek
HK$23.36
Each
units
Phototransistor 1 - - Screw Mount - 4 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +85°C -40°C 3.18mm 12.95mm
RS Stock No. 667-5039
Mfr. Part No.GP1S58VJ000F
BrandSharp
HK$9.832
Each (In a Pack of 5)
units
Phototransistor 1 3µs 4µs Through Hole - 4 13.7 x 5.2 x 12mm 12mm 13.7mm +85°C -25°C 5mm 5.2mm
RS Stock No. 880-2025
Mfr. Part No.OPB880P51Z
BrandOptek
HK$40.12
Each
units
- 1 - - Screw Mount - 4 18.47 x 6.35 x 15.75mm 15.75mm 18.47mm +85°C -40°C 3.3mm 6.35mm
RS Stock No. 124-6797
Mfr. Part No.RPI-441C1
BrandROHM
HK$3.705
Each (In a Pack of 15)
units
Phototransistor 1 10µs 10µs Through Hole - 4 8 x 4.2 x 5.2mm 5.2mm 8mm +85°C -25°C 4mm 4.2mm
RS Stock No. 170-0775
Mfr. Part No.OPB830L51
BrandOptek
HK$22.918
Each (In a Bag of 25)
units
Phototransistor 1 - - Screw Mount - 4 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +85°C -40°C 3.18mm 12.95mm
RS Stock No. 908-7198
Mfr. Part No.OPB930W55Z
BrandOptek
HK$48.04
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. 178-5045
Mfr. Part No.GP1S52VJ000F
BrandSharp
HK$4.661
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. 700-3999
Mfr. Part No.RPI-352
BrandROHM
HK$9.165
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. 146-1449
Mfr. Part No.TCUT1350X01
BrandVishay
HK$5.758
Each (On a Reel of 2000)
units
Phototransistor 2 9µs 16µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +125°C -40°C 3mm 4mm
RS Stock No. 303-1192
Mfr. Part No.OPB365T55
BrandOptek
HK$25.91
Each
units
Phototransistor 1 10µs - 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. 818-7537
Mfr. Part No.TCUT1350X01
BrandVishay
HK$9.671
Each (In a Pack of 10)
units
Phototransistor 2 9µs 16µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +125°C -40°C 3mm 4mm
RS Stock No. 173-0303
Mfr. Part No.OPB917BZ
BrandOptek
HK$48.565
Each (In a Box of 100)
units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Through Hole - 5 30.73 x 6.35 x 25.65mm 25.65mm 30.73mm +85°C -40°C 5.08mm 6.35mm
RS Stock No. 908-7255
Mfr. Part No.OPB993L11Z
BrandOptek
HK$50.85
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
New
RS Stock No. 205-0553
Mfr. Part No.EE-SX1106
BrandOmron
HK$10.982
Each (In a Pack of 10)
units
Phototransistor 1 - - Through Hole - - - - - - - - -
RS Stock No. 908-7166
Mfr. Part No.OPB831W55Z
BrandOptek
HK$39.67
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. 908-7258
Mfr. Part No.OPB991P51Z
BrandOptek
HK$47.15
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
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