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. 821-0139
Mfr. Part No.EE-SX674A
BrandOmron
HK$243.10
Each
units
- - - - - - - - - - - - - -
RS Stock No. 908-7236
Mfr. Part No.OPB973N51
BrandOptek
HK$30.01
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$55.44
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$54.358
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. 136-0653
Mfr. Part No.TCPT1300X01
BrandVishay
HK$6.191
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$27.86
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. 170-0774
Mfr. Part No.OPB460T11
BrandOptek
HK$27.31
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. 616-5686
Mfr. Part No.KRB031
BrandKingbright
HK$11.51
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. 178-1533
Mfr. Part No.GP1A51HRJ00F
BrandSharp
HK$8.988
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. 165-1493
Mfr. Part No.KRB031
BrandKingbright
HK$7.889
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. 818-1494
Mfr. Part No.EE-SX672A
BrandOmron
HK$200.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 710-3816
Mfr. Part No.TCPT1300X01
BrandVishay
HK$13.84
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. 666-6473
Mfr. Part No.GP1A51HRJ00F
BrandSharp
HK$15.362
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. 303-1192
Mfr. Part No.OPB365T55
BrandOptek
HK$27.68
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. 880-2025
Mfr. Part No.OPB880P51Z
BrandOptek
HK$41.72
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. 455-0880
Mfr. Part No.OPB830L51
BrandOptek
HK$23.81
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. 170-0775
Mfr. Part No.OPB830L51
BrandOptek
HK$23.362
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. 146-1449
Mfr. Part No.TCUT1350X01
BrandVishay
HK$5.87
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. 788-4962
Mfr. Part No.EE-SX4009-P1
BrandOmron
HK$51.035
Each (In a Pack of 2)
units
Phototransistor 1 - - Screw Mount - 3 7 x 11 x 34mm 34mm 7mm +75°C -25°C 5mm 11mm
RS Stock No. 908-7198
Mfr. Part No.OPB930W55Z
BrandOptek
HK$48.97
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