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. 146-0769
Mfr. Part No.GP1S173LCS2F
BrandSharp
TWD42.60
Each (In a Pack of 10)
units
Phototransistor 1 3µs 4µs Snap-In - 5 27.1 x 9.8 x 16.3mm 16.3mm 27.1mm -30°C +95°C 4.3mm 9.8mm
RS Stock No. 124-6791
Mfr. Part No.RPI-0226
BrandROHM
TWD24.50
Each (In a Pack of 15)
units
Phototransistor 1 30µs 30µs Surface Mount SMD 4 4.4 x 2.7 x 2.8mm 2.8mm 4.4mm +85°C -30°C 2mm 2.7mm
RS Stock No. 170-0775
Mfr. Part No.OPB830L51
BrandOptek
TWD90.40
Each (In a Bag of 25)
units
Phototransistor 1 - - Screw Mount - 4 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +85°C -40°C 3.18mm 12.95mm
RS Stock No. 908-7205
Mfr. Part No.OPB941W51Z
BrandOptek
TWD180.00
Each
units
Transistor - 70ns 70ns Panel Mount Wire - 23.75 x 12.95 x 10.54mm 10.54mm 23.75mm +70°C -40°C 3.18mm 12.95mm
RS Stock No. 174-2512
Mfr. Part No.TCUT1630X01
BrandVishay
TWD36.70
Each (On a Reel of 1100)
units
Phototransistor 3 9µs 16µs Surface Mount SMD 10 5.7 x 5.9 x 7.1mm 7.1mm 5.7mm +105°C -40°C 3mm 5.9mm
RS Stock No. 818-7512
Mfr. Part No.TCPT1350X01
BrandVishay
TWD37.70
Each (In a Pack of 10)
units
Transistor 1 9µs 16µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +125°C -40°C 3mm 4mm
RS Stock No. 176-0817
Mfr. Part No.EE-SX4081
BrandOmron
TWD113.90
Each (In a Bag of 200)
units
- 1 - - Through Hole - 5 13.7 x 5 x 10mm 10mm 13.7mm +75°C -40°C 5mm 5mm
RS Stock No. 165-6371
Mfr. Part No.TCPT1350X01
BrandVishay
TWD23.30
Each (On a Reel of 2000)
units
Transistor 1 9µs 16µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +125°C -40°C 3mm 4mm
RS Stock No. 219-2577
Mfr. Part No.EE-SG3B
BrandOmron
TWD173.00
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. 170-0961
Mfr. Part No.OPB880P51Z
BrandOptek
TWD148.00
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. 183-7472
Mfr. Part No.EESX1330
BrandOmron
TWD27.00
Each (In a Pack of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 178-5031
Mfr. Part No.GP1S093HCZ0F
BrandSharp
TWD12.40
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. 788-4931
Mfr. Part No.EE-SX1046
BrandOmron
TWD161.50
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. 821-0113
Mfr. Part No.EE-SX473
BrandOmron
TWD739.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 177-4906
Mfr. Part No.EE-SX3081
BrandOmron
TWD73.70
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. 908-7148
Mfr. Part No.OPB816Z
BrandOptek
TWD136.00
Each
units
Transistor - - - Panel Mount Wire - 30.73 x 6.35 x 19.3mm 19.3mm 30.73mm +85°C -40°C 5.1mm 6.35mm
RS Stock No. 173-0304
Mfr. Part No.OPB900W55Z
BrandOptek
TWD210.90
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. 170-0958
Mfr. Part No.OPB840W11Z
BrandOptek
TWD194.10
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. 170-0965
Mfr. Part No.OPB992T51Z
BrandOptek
TWD179.10
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. 880-2037
Mfr. Part No.OPB990T51Z
BrandOptek
TWD190.00
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