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. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
$10.53
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. 788-4931
Mfr. Part No.EE-SX1046
BrandOmron
$4.24
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. 219-2577
Mfr. Part No.EE-SG3B
BrandOmron
$6.79
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. 818-1494
Mfr. Part No.EE-SX672A
BrandOmron
$44.07
Each
units
- - - - - - - - - - - - - -
RS Stock No. 818-1485
Mfr. Part No.EE-SX671A
BrandOmron
$52.66
Each
units
- - - - - - - - - - - - - -
RS Stock No. 177-4908
Mfr. Part No.EE-SX1046
BrandOmron
$4.04
Each (In a Bag of 250)
units
Phototransistor 1 4µs 4µs Through Hole - 4 - 6.5mm 10mm +85°C -25°C 3mm -
RS Stock No. 219-2533
Mfr. Part No.EE-SX1041
BrandOmron
$4.40
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. 176-0824
Mfr. Part No.EE-SX4081
BrandOmron
$7.115
Each (In a Pack of 2)
units
- 1 - - Through Hole - 5 13.7 x 5 x 10mm 10mm 13.7mm +75°C -40°C 5mm 5mm
RS Stock No. 177-4882
Mfr. Part No.EE-SX384
BrandOmron
$5.517
Each (In a Bag of 200)
units
Phototransistor 1 3µs 20µs Through Hole - 5 12.5 x 5 x 8mm 8mm 12.5mm +75°C -40°C 3.5mm 5mm
RS Stock No. 219-2527
Mfr. Part No.EE-SX4070
BrandOmron
$3.92
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. 177-4906
Mfr. Part No.EE-SX3081
BrandOmron
$3.985
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. 821-0113
Mfr. Part No.EE-SX473
BrandOmron
$37.77
Each
units
- - - - - - - - - - - - - -
RS Stock No. 818-1491
Mfr. Part No.EE-SX670A
BrandOmron
$50.01
Each
units
- - - - - - - - - - - - - -
RS Stock No. 788-4962
Mfr. Part No.EE-SX4009-P1
BrandOmron
$8.105
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. 788-4943
Mfr. Part No.EE-SX1081
BrandOmron
$5.428
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
RS Stock No. 219-2511
Mfr. Part No.EE-SX1070
BrandOmron
$4.26
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. 177-4905
Mfr. Part No.EE-SX4009-P1
BrandOmron
$4.651
Each (In a Box of 100)
units
Phototransistor 1 - - Screw Mount - 3 7 x 11 x 34mm 34mm 7mm +75°C -25°C 5mm 11mm
RS Stock No. 176-0819
Mfr. Part No.EE-SX1350
BrandOmron
$1.72
Each (On a Reel of 400)
units
Phototransistor 1 11µs 14µs Surface Mount SMD 6 9 x 4 x 9mm 9mm 9mm +85°C -30°C 5mm 4mm
RS Stock No. 788-4959
Mfr. Part No.EE-SX3081
BrandOmron
$6.46
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. 788-4953
Mfr. Part No.EE-SX384
BrandOmron
$7.87
Each (In a Pack of 2)
units
Phototransistor 1 3µs 20µs Through Hole - 5 12.5 x 5 x 8mm 8mm 12.5mm +75°C -40°C 3.5mm 5mm