LTR301 Phototransistor 940nm Side View Radial (IR Phototransistor Sensor)
The LTR301 Phototransistor is a silicon NPN infrared light sensor designed to detect IR radiation and convert it into an electrical signal. It is optimized for a peak wavelength of 940nm, making it ideal for use with IR emitters in sensing and optical switching applications.
This device features a side view radial package, allowing detection perpendicular to the PCB, which is especially useful in compact designs such as opto interrupters and encoder systems.
Key Features
- Infrared Detection 940nm optimized for IR systems
- NPN Phototransistor high gain light sensing
- Side View Package suitable for compact optical layouts
- Wide Viewing Angle approx 70 degree
- Fast Response suitable for switching applications
- Low Dark Current stable operation
Specifications
- Device Type: Silicon phototransistor
- Peak Wavelength: 940nm
- Collector Emitter Voltage: up to 30V
- Collector Current: up to approx 2.4mA
- Dark Current: approx 100nA
- Power Dissipation: approx 100mW
- Viewing Angle: approx 70 degree
- Operating Temperature: -40 to 85 degree C
- Package Type: Side view radial through hole
Applications
- Optical interrupters and slot sensors
- Encoder and position sensing systems
- Object detection circuits
- IR communication and detection
- Industrial automation and robotics
Pinout Configuration
Working Principle
- Infrared light falls on phototransistor
- Photons generate base current internally
- Transistor amplifies current
- Output varies with IR intensity
