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. 455-0880
Mfr. Part No.OPB830L51
BrandOptek
£2.05
Each
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. 908-7141
Mfr. Part No.OPB811W55Z
BrandOptek
£2.98
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. 124-6792
Mfr. Part No.RPI-0352E
BrandROHM
£0.568
Each (In a Pack of 10)
Units
Phototransistor 1 10µs 10µs Surface Mount - 4 6.4 x 4.2 x 5.4mm 5.4mm 6.4mm +85°C -30°C 3mm 4.2mm
RS Stock No. 908-7236
Mfr. Part No.OPB973N51
BrandOptek
£2.14
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. 666-6511
Mfr. Part No.GP1S092HCPIF
BrandSharp
£0.494
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. 178-5082
Mfr. Part No.GP1S092HCPIF
BrandSharp
£0.267
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. 170-0952
Mfr. Part No.OPB829CZ
BrandOptek
£2.569
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. 908-7172
Mfr. Part No.OPB854A3
BrandOptek
£2.068
Each (In a Pack of 10)
Units
Transistor - - - Through Hole Pin 4 25.4 x 6.35 x 10.8mm 10.8mm 25.4mm +85°C -40°C 5.08mm 6.35mm
RS Stock No. 788-4943
Mfr. Part No.EE-SX1081
BrandOmron
£2.126
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. 177-4907
Mfr. Part No.EE-SX1081
BrandOmron
£1.424
Each (In a Box of 200)
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. 818-1494
Mfr. Part No.EE-SX672A
BrandOmron
£17.02
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 880-1993
Mfr. Part No.OPB829CZ
BrandOptek
£2.825
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. 908-7220
Mfr. Part No.OPB960T51
BrandOptek
£2.46
Each
Units
Transistor - 70ns 70ns Through Hole Pin 5 24.63 x 6.35 x 10.8mm 10.8mm 24.63mm +70°C -40°C 3.18mm 6.35mm
RS Stock No. 178-7410
Mfr. Part No.GP1S094HCZ0F
BrandSharp
£0.183
Each (In a Bag of 5000)
Units
Phototransistor 1 50µs 50µs Through Hole - 4 5.5 x 2.6 x 4.8mm 4.8mm 5.5mm +85°C -25°C 3mm 2.6mm
RS Stock No. 666-6518
Mfr. Part No.GP1S094HCZ0F
BrandSharp
£0.50
Each (In a Pack of 5)
Units
Phototransistor 1 50µs 50µs Through Hole - 4 5.5 x 2.6 x 4.8mm 4.8mm 5.5mm +85°C -25°C 3mm 2.6mm
RS Stock No. 908-7135
Mfr. Part No.OPB802W55Z
BrandOptek
£2.85
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. 818-7528
Mfr. Part No.TCST2202
BrandVishay
£0.923
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. 146-1449
Mfr. Part No.TCUT1350X01
BrandVishay
£0.532
Each (On a Reel of 2000)
Units
Phototransistor 2 9µs 16µs Surface Mount - 6 5.5 x 4 x 4mm 4mm 5.5mm +125°C -40°C 3mm 4mm
RS Stock No. 170-0955
Mfr. Part No.OPB830W11Z
BrandOptek
£3.92
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. 145-2313
Mfr. Part No.TCST2202
BrandVishay
£0.839
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
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