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. 165-1495
Mfr. Part No.KRB011
BrandKingbright
$1.337
Each (On a Reel of 1500)
units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 5 x 4mm 4mm 4mm +85°C -30°C 2mm 5mm
RS Stock No. 616-5670
Mfr. Part No.KRB011
BrandKingbright
$2.124
Each (In a Pack of 5)
units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 5 x 4mm 4mm 4mm +85°C -30°C 2mm 5mm
RS Stock No. 616-5686
Mfr. Part No.KRB031
BrandKingbright
$2.048
Each (In a Pack of 5)
units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 6 x 5mm 5mm 4mm +85°C -40°C 3mm 6mm
RS Stock No. 165-1493
Mfr. Part No.KRB031
BrandKingbright
$1.404
Each (On a Reel of 1000)
units
Phototransistor 1 8000ns 10000ns Surface Mount SMD 4 4 x 6 x 5mm 5mm 4mm +85°C -40°C 3mm 6mm