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. 219-2533
Mfr. Part No.EE-SX1041
BrandOmron
£1.93
Each
Units
Transistor 1 4000ns 4000ns Through Hole - 4 6 x 14.6 x 10.9mm 10.9mm 6mm +95°C -25°C 5mm 14.6mm
RS Stock No. 880-2040
Mfr. Part No.OPB992T51Z
BrandOptek
£4.19
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. 170-0965
Mfr. Part No.OPB992T51Z
BrandOptek
£3.808
Each (In a Bag of 100)
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. 666-6482
Mfr. Part No.GP1A52LRJ00F
BrandSharp
£1.49
Each (In a Pack of 2)
Units
Photologic, Pull Up 1 0.1µs 0.05µs Through Hole - 5 12.2 x 5 x 10mm 10mm 12.2mm +85°C -25°C 3mm 5mm
RS Stock No. 178-1534
Mfr. Part No.GP1A52LRJ00F
BrandSharp
£0.808
Each (In a Bag of 100)
Units
Photologic, Pull Up 1 0.1µs 0.05µs Through Hole - 5 12.2 x 5 x 10mm 10mm 12.2mm +85°C -25°C 3mm 5mm
RS Stock No. 219-2577
Mfr. Part No.EE-SG3B
BrandOmron
£2.99
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. 616-5670
Mfr. Part No.KRB011
BrandKingbright
£0.938
Each (In a Pack of 5)
Units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 5 x 4mm 4mm 4mm +85°C -30°C 2mm 5mm
RS Stock No. 165-1495
Mfr. Part No.KRB011
BrandKingbright
£0.62
Each (On a Reel of 1500)
Units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 5 x 4mm 4mm 4mm +85°C -30°C 2mm 5mm
RS Stock No. 170-0961
Mfr. Part No.OPB880P51Z
BrandOptek
£3.10
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. 880-2025
Mfr. Part No.OPB880P51Z
BrandOptek
£3.68
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. 170-0780
Mfr. Part No.OPB360T51
BrandOptek
£1.66
Each (In a Bag of 25)
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. 455-8020
Mfr. Part No.OPB360T51
BrandOptek
£1.83
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. 178-5031
Mfr. Part No.GP1S093HCZ0F
BrandSharp
£0.277
Each (In a Tube of 100)
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. 666-6514
Mfr. Part No.GP1S093HCZ0F
BrandSharp
£0.391
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. 177-4906
Mfr. Part No.EE-SX3081
BrandOmron
£1.797
Each (In a Bag of 200)
Units
Phototransistor 1 3µs 20µs Through Hole - 5 13.7 x 5 x 10mm 10mm 13.7mm +75°C -40°C 5mm 5mm
RS Stock No. 919-0177
Mfr. Part No.TCST2300
BrandVishay
£0.95
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. 173-0304
Mfr. Part No.OPB900W55Z
BrandOptek
£4.337
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. 788-4959
Mfr. Part No.EE-SX3081
BrandOmron
£3.06
Each (In a Pack of 2)
Units
Phototransistor 1 3µs 20µs Through Hole - 5 13.7 x 5 x 10mm 10mm 13.7mm +75°C -40°C 5mm 5mm
RS Stock No. 708-5556
Mfr. Part No.TCST2300
BrandVishay
£1.508
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. 880-1983
Mfr. Part No.OPB900W55Z
BrandOptek
£5.53
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
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