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. 170-0964
Mfr. Part No.OPB990T51Z
BrandOptek
$9.53
Each (In a Bag of 25)
units
- 1 70ns 70ns Screw Mount - 5 24.63 x 6.35 x 10.8mm 10.8mm 24.63mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 880-2037
Mfr. Part No.OPB990T51Z
BrandOptek
$9.14
Each
units
- 1 70ns 70ns Screw Mount - 5 24.63 x 6.35 x 10.8mm 10.8mm 24.63mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 880-1993
Mfr. Part No.OPB829CZ
BrandOptek
$6.70
Each (In a Pack of 2)
units
- 1 - - Screw Mount - 4 24.64 x 6.35 x 10.03mm 10.03mm 24.64mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 194-4030
Mfr. Part No.OPB815WZ
BrandOptek
$8.06
Each
units
Phototransistor 1 - - Chassis Mount PCB Module - - - - +80°C -40°C 9.53mm 9.53mm
RS Stock No. 170-0776
Mfr. Part No.OPB916BZ
BrandOptek
$8.68
Each (In a Bag of 25)
units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Screw Mount - 5 30.73 x 6.48 x 19.3mm 19.3mm 30.73mm +80°C -40°C 5.08mm 6.48mm
RS Stock No. 170-0952
Mfr. Part No.OPB829CZ
BrandOptek
$6.03
Each (In a Bag of 100)
units
- 1 - - Screw Mount - 4 24.64 x 6.35 x 10.03mm 10.03mm 24.64mm +80°C -40°C 3.18mm 6.35mm
RS Stock No. 455-0896
Mfr. Part No.OPB916BZ
BrandOptek
$9.44
Each
units
Buffer, Open-Collector with 10K Pull-Up Resistor 1 50ns 50ns Screw Mount - 5 30.73 x 6.48 x 19.3mm 19.3mm 30.73mm +80°C -40°C 5.08mm 6.48mm
RS Stock No. 194-4024
Mfr. Part No.OPB815L
BrandOptek
$4.86
Each
units
Phototransistor 1 - - Screw Mount - 4 32 x 6.6 x 14.35mm 14.35mm 32mm +80°C -40°C 9.53mm 6.6mm
RS Stock No. 170-0765
Mfr. Part No.OPB815L
BrandOptek
$4.521
Each (In a Bag of 25)
units
Phototransistor 1 - - Screw Mount - 4 32 x 6.6 x 14.35mm 14.35mm 32mm +80°C -40°C 9.53mm 6.6mm
RS Stock No. 173-0303
Mfr. Part No.OPB917BZ
BrandOptek
$9.11
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. 455-0919
Mfr. Part No.OPB917BZ
BrandOptek
$17.32
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. 453-0836
Mfr. Part No.H21A3
BrandIsocom
$2.822
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. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
$7.95
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. 170-2452
Mfr. Part No.GP1S58VJ000F
BrandSharp
$1.199
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. 788-4931
Mfr. Part No.EE-SX1046
BrandOmron
$7.34
Each (In a Pack of 2)
units
Phototransistor 1 4µs 4µs Through Hole - 4 - 6.5mm 10mm +85°C -25°C 3mm -
RS Stock No. 455-8020
Mfr. Part No.OPB360T51
BrandOptek
$3.91
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. 219-2577
Mfr. Part No.EE-SG3B
BrandOmron
$6.68
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. 455-0874
Mfr. Part No.OPB460T11
BrandOptek
$4.98
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. 301-8442
Mfr. Part No.OPB620
BrandOptek
$2.79
Each
units
Phototransistor 1 - - Through Hole - 4 10.16 x 5.59 x 9.52mm 9.52mm 10.16mm +100°C -40°C 4.83mm 5.59mm
RS Stock No. 666-6530
Mfr. Part No.GP1S53J000F
BrandSharp
$2.066
Each (In a Pack of 5)
units
Phototransistor 1 3µs 4µs Through Hole - 4 13.7 x 5.2 x 10mm 10mm 13.7mm +85°C -25°C 5mm 5.2mm
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