A phototransistor is an electronic element that relies on light as the gate control mechanism and current regulator. Most phototransistors are made in the form of a bipolar transistor, meaning that the base-collector-emitter structure is used. The main difference is that the base semiconducting material is designed so that it is sensitive to a light source. As photons enter into the base structure, they are converted into a current flow that acts as the BJT base current that acts to enable the transistor.
The phototransistor is housed in a transparent casing to allow for easy light passage. Often, they have casings that help to enhance and focus light entry to the critical and sensitive components of the transistor. When the base current is formed from light entry, this allows a large amount of current to pass from the emitter to collector.
Since light acts as a switch in the case of a bipolar phototransistor, these devices are used in many electrical circuits that have important light sensitivities. This could include fire alarms and computer equipment like CD players or infrared devices.

Market Analysis and Insights: Global Phototransistors Market
The global Phototransistors market was valued at US$ XX in 2020 and will reach US$ XX million by the end of 2027, growing at a CAGR of XX% during 2022-2027.

Global Phototransistors Scope and Market Size
The global Phototransistors market is segmented by company, region (country), by Type, and by Application. Players, stakeholders, and other participants in the global Phototransistors market will be able to gain the upper hand as they use the report as a powerful resource. The segmental analysis focuses on sales, revenue and forecast by region (country), by Type and by Application for the period 2016-2027.

Segment by Type
Circular
Domed
Flat
Others

Segment by Application
Opto-isolators
Position Sensing
Security Systems
Coin Counters
Others

The Phototransistors market is analysed and market size information is provided by regions (countries). Segment by Application, the Phototransistors market is segmented into North America, Europe, China, Japan, Southeast Asia, India and Other Regions.

By Company
OSRAM Opto Semiconductors
Everlight Electronics
Excelitas Technologies Corp
Honeywell
Kingbright Company LLC
Lite-on Technology
Micropac Industries
ON Semiconductor
ROHM Semiconductor
Sharp
Spark-un Electronics
Stanley Electric
T Electronics/Optek Technology
Vishay