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. 908-7236
Mfr. Part No.OPB973N51
BrandOptek
HK$25.55
Each
units
Transistor - 70ns 70ns Through Hole Pin 5 12.32 x 6.35 x 10.8mm 10.8mm 12.32mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 880-1983
Mfr. Part No.OPB900W55Z
BrandOptek
HK$46.66
Each
units
Transistor 1 70ns 70ns Screw Mount - 5 30.99 x 6.35 x 10.8mm 10.8mm 30.99mm +70°C -40°C 9.53mm 6.35mm
RS Stock No. 173-0304
Mfr. Part No.OPB900W55Z
BrandOptek
HK$64.906
Each (In a Bag of 92)
units
Transistor 1 70ns 70ns Screw Mount - 5 30.99 x 6.35 x 10.8mm 10.8mm 30.99mm +70°C -40°C 9.53mm 6.35mm
RS Stock No. 170-0774
Mfr. Part No.OPB460T11
BrandOptek
HK$23.70
Each (In a Bag of 25)
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. 710-3816
Mfr. Part No.TCPT1300X01
BrandVishay
HK$12.778
Each (In a Pack of 5)
units
Phototransistor 1 20µs 30µs Surface Mount SMD 6 4 x 5 x 4mm 4mm 4mm +85°C -40°C 3mm 5mm
RS Stock No. 178-1533
Mfr. Part No.GP1A51HRJ00F
BrandSharp
HK$9.33
Each (In a Bag of 100)
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. 616-5686
Mfr. Part No.KRB031
BrandKingbright
HK$11.78
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. 136-0653
Mfr. Part No.TCPT1300X01
BrandVishay
HK$5.56
Each (On a Reel of 2000)
units
Transistor 2 20µs 30µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +105°C -40°C 3mm 4mm
RS Stock No. 455-0874
Mfr. Part No.OPB460T11
BrandOptek
HK$24.13
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. 666-6473
Mfr. Part No.GP1A51HRJ00F
BrandSharp
HK$11.996
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. 165-1493
Mfr. Part No.KRB031
BrandKingbright
HK$6.361
Each (On a Reel of 1000)
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. 170-0775
Mfr. Part No.OPB830L51
BrandOptek
HK$18.963
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. 173-0303
Mfr. Part No.OPB917BZ
BrandOptek
HK$43.898
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. 219-2511
Mfr. Part No.EE-SX1070
BrandOmron
HK$20.24
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. 700-3999
Mfr. Part No.RPI-352
BrandROHM
HK$5.445
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. 455-0919
Mfr. Part No.OPB917BZ
BrandOptek
HK$45.69
Each
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. 170-2452
Mfr. Part No.GP1S58VJ000F
BrandSharp
HK$5.304
Each (In a Bag of 100)
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. 169-0524
Mfr. Part No.RPI-352
BrandROHM
HK$3.268
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. 124-6797
Mfr. Part No.RPI-441C1
BrandROHM
HK$3.263
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. 455-0880
Mfr. Part No.OPB830L51
BrandOptek
HK$23.91
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
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