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. 170-2452
Mfr. Part No.GP1S58VJ000F
BrandSharp
TWD24.10
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. 666-6511
Mfr. Part No.GP1S092HCPIF
BrandSharp
TWD20.90
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. 908-7223
Mfr. Part No.OPB962N51
BrandOptek
TWD111.00
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. 667-5039
Mfr. Part No.GP1S58VJ000F
BrandSharp
TWD44.80
Each (In a Pack of 5)
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. 178-5082
Mfr. Part No.GP1S092HCPIF
BrandSharp
TWD12.00
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. 301-8442
Mfr. Part No.OPB620
BrandOptek
TWD56.00
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. 219-2561
Mfr. Part No.EE-SG3
BrandOmron
TWD168.00
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. 700-3999
Mfr. Part No.RPI-352
BrandROHM
TWD32.00
Each (In a Pack of 2)
units
Phototransistor 1 10µs 10µs Through Hole - 4 6.4 x 4.2 x 5.4mm 5.4mm 6.4mm +85°C -25°C 3mm 4.2mm
RS Stock No. 908-7157
Mfr. Part No.OPB821S5Z
BrandOptek
TWD173.00
Each
units
Transistor - - - Free Hanging Wire - 15.24 x 6.35 x 8.89mm 8.89mm 15.24mm +85°C -40°C 2.03mm 6.35mm
RS Stock No. 708-5547
Mfr. Part No.TCST1202
BrandVishay
TWD53.80
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. 145-2313
Mfr. Part No.TCST2202
BrandVishay
TWD38.40
Each (In a Tube of 85)
units
Phototransistor 1 10µs 8µs Through Hole Leaded 4 24.5 x 6.3 x 10.8mm 10.8mm 24.5mm +85°C -55°C - 6.3mm
RS Stock No. 710-3816
Mfr. Part No.TCPT1300X01
BrandVishay
TWD56.60
Each (In a Pack of 5)
units
Phototransistor 1 20µs 30µs Surface Mount SMD 6 4 x 5 x 4mm 4mm 4mm +85°C -40°C 3mm 5mm
RS Stock No. 821-0139
Mfr. Part No.EE-SX674A
BrandOmron
TWD974.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 455-0868
Mfr. Part No.OPB625
BrandOptek
TWD76.00
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. 136-0653
Mfr. Part No.TCPT1300X01
BrandVishay
TWD23.00
Each (On a Reel of 2000)
units
Transistor 2 20µs 30µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +105°C -40°C 3mm 4mm
RS Stock No. 818-1485
Mfr. Part No.EE-SX671A
BrandOmron
TWD1,049.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 818-7528
Mfr. Part No.TCST2202
BrandVishay
TWD38.40
Each (In a Pack of 10)
units
Phototransistor 1 10µs 8µs Through Hole Leaded 4 24.5 x 6.3 x 10.8mm 10.8mm 24.5mm +85°C -55°C - 6.3mm
RS Stock No. 666-6530
Mfr. Part No.GP1S53J000F
BrandSharp
TWD43.60
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
RS Stock No. 818-1497
Mfr. Part No.EE-SX673A
BrandOmron
TWD765.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 170-0773
Mfr. Part No.OPB625
BrandOptek
TWD72.60
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