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. 818-1491
Mfr. Part No.EE-SX670A
BrandOmron
MYR115.22
Each
units
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RS Stock No. 818-1497
Mfr. Part No.EE-SX673A
BrandOmron
MYR111.34
Each
units
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RS Stock No. 453-0836
Mfr. Part No.H21A3
BrandIsocom
MYR8.552
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. 818-1485
Mfr. Part No.EE-SX671A
BrandOmron
MYR112.61
Each
units
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RS Stock No. 219-2527
Mfr. Part No.EE-SX4070
BrandOmron
MYR16.43
Each
units
Open Collector 1 - - Through Hole - 5 11 x 8 x 9.7mm 9.7mm 11mm +75°C -40°C 8mm 8mm
RS Stock No. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
MYR25.82
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. 821-0139
Mfr. Part No.EE-SX674A
BrandOmron
MYR142.30
Each
units
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RS Stock No. 219-2533
Mfr. Part No.EE-SX1041
BrandOmron
MYR13.10
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. 908-7132
Mfr. Part No.OPB810W51Z
BrandOptek
MYR21.24
Each
units
Transistor - - - Panel Mount Wire - 30.99 x 6.35 x 15.63mm 15.63mm 30.99mm +80°C -40°C 9.53mm 6.35mm
RS Stock No. 170-0955
Mfr. Part No.OPB830W11Z
BrandOptek
MYR26.339
Each (In a Bag of 100)
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. 880-2006
Mfr. Part No.OPB830W11Z
BrandOptek
MYR27.90
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. 219-2511
Mfr. Part No.EE-SX1070
BrandOmron
MYR13.70
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. 821-0123
Mfr. Part No.EE-SX671P
BrandOmron
MYR117.54
Each
units
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RS Stock No. 908-7236
Mfr. Part No.OPB973N51
BrandOptek
MYR15.63
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. 818-1494
Mfr. Part No.EE-SX672A
BrandOmron
MYR122.98
Each
units
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RS Stock No. 170-0964
Mfr. Part No.OPB990T51Z
BrandOptek
MYR26.285
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
MYR28.00
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. 908-7144
Mfr. Part No.OPB815WZ
BrandOptek
MYR22.03
Each
units
Transistor - - - Free Hanging Wire - 31.75 x 3.18 x 14.1mm 14.1mm 31.75mm +80°C -40°C 9.53mm 3.18mm
RS Stock No. 194-4030
Mfr. Part No.OPB815WZ
BrandOptek
MYR23.02
Each
units
Phototransistor 1 - - Chassis Mount PCB Module - - - - +80°C -40°C 9.53mm 9.53mm
RS Stock No. 177-4908
Mfr. Part No.EE-SX1046
BrandOmron
MYR10.994
Each (In a Bag of 250)
units
Phototransistor 1 4µs 4µs Through Hole - 4 - 6.5mm 10mm +85°C -25°C 3mm -