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. 178-5031
Mfr. Part No.GP1S093HCZ0F
BrandSharp
$0.513
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
$0.783
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. 708-5538
Mfr. Part No.TCST1103
BrandVishay
$2.424
Each (In a Pack of 5)
units
Phototransistor 1 10µs 8µs Through Hole - 4 11.9 x 6.3 x 11.1mm 11.1mm 11.9mm +85°C -55°C 3.1mm 6.3mm
RS Stock No. 919-0165
Mfr. Part No.TCST1103
BrandVishay
$1.27
Each (In a Tube of 85)
units
Phototransistor 1 10 μ 8µs Through Hole - 4 11.9 x 6.3 x 11.1mm 11.1mm 11.9mm 85°C -55°C 3.1mm 6.3mm
RS Stock No. 219-2511
Mfr. Part No.EE-SX1070
BrandOmron
$4.16
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. 453-0842
Mfr. Part No.H21A6
BrandIsocom
$3.138
Each (In a Pack of 5)
units
Phototransistor 1 8µs 50µs Screw Mount - 4 25.7 x 6.6 x 11.1mm 11.1mm 25.7mm +85°C -25°C 3mm 6.6mm
RS Stock No. 880-2003
Mfr. Part No.OPB830W55Z
BrandOptek
$8.27
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. 666-6518
Mfr. Part No.GP1S094HCZ0F
BrandSharp
$1.02
Each (In a Pack of 5)
units
Phototransistor 1 50µs 50µs Through Hole - 4 5.5 x 2.6 x 4.8mm 4.8mm 5.5mm +85°C -25°C 3mm 2.6mm
RS Stock No. 173-0304
Mfr. Part No.OPB900W55Z
BrandOptek
$8.77
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. 880-1983
Mfr. Part No.OPB900W55Z
BrandOptek
$10.25
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. 453-0836
Mfr. Part No.H21A3
BrandIsocom
$2.692
Each (In a Pack of 5)
units
Phototransistor 1 8µs 50µs Screw Mount - 4 25.7 x 6.6 x 11.1mm 11.1mm 25.7mm +85°C -25°C 3mm 6.6mm
RS Stock No. 880-2028
Mfr. Part No.OPB841W55Z
BrandOptek
$8.63
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. 178-7410
Mfr. Part No.GP1S094HCZ0F
BrandSharp
$0.336
Each (In a Bag of 5000)
units
Phototransistor 1 50µs 50µs Through Hole - 4 5.5 x 2.6 x 4.8mm 4.8mm 5.5mm +85°C -25°C 3mm 2.6mm
RS Stock No. 170-0962
Mfr. Part No.OPB841W55Z
BrandOptek
$6.68
Each (In a Box of 25)
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. 170-0773
Mfr. Part No.OPB625
BrandOptek
$3.02
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. 178-5082
Mfr. Part No.GP1S092HCPIF
BrandSharp
$0.477
Each (On a Reel of 2000)
units
Phototransistor 1 50µs 50µs Surface Mount SMD 4 2.6 x 4.5 x 2.9mm 2.9mm 2.6mm +85°C -25°C 2mm 4.5mm
RS Stock No. 455-0868
Mfr. Part No.OPB625
BrandOptek
$4.00
Each
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. 818-1494
Mfr. Part No.EE-SX672A
BrandOmron
$44.39
Each
units
- - - - - - - - - - - - - -
RS Stock No. 666-6511
Mfr. Part No.GP1S092HCPIF
BrandSharp
$1.307
Each (In a Pack of 10)
units
Phototransistor 1 50µs 50µs Surface Mount SMD 4 2.6 x 4.5 x 2.9mm 2.9mm 2.6mm +85°C -25°C 2mm 4.5mm
RS Stock No. 788-4943
Mfr. Part No.EE-SX1081
BrandOmron
$4.89
Each (In a Pack of 5)
units
Phototransistor 1 4µs 4µs Through Hole - 4 13.7 x 5 x 10mm 10mm 13.7mm +85°C -25°C 5mm 5mm