The ST-1KLB is a silicon phototransistor manufactured by KODENSHI KOREA CORP. It's designed for light detection in various applications. This device is housed in a clear plastic package to maximize light sensitivity. The phototransistor responds to infrared and visible light, making it suitable for a range of sensing applications.

Applications

• Optical Sensors: Used in devices that detect light levels.
• Light Barriers: Employed in security systems and object detection.
• Remote Control Systems: Detects infrared signals from remote controls.
• Optical Switches: Used as a light-activated switch in electronic circuits.

Features

• High Sensitivity: Efficiently detects low levels of light.
• Fast Switching Speed: Quickly responds to changes in light intensity.
• Compact Package: Small size allows for easy integration into various designs.
• Visible and Infrared Light Response: Detects both visible and infrared light.

Benefits

• Reliable Light Detection: Provides accurate and consistent light sensing.
• Versatile Use: Suitable for a wide range of light-dependent applications.
• Easy Integration: Simple to incorporate into electronic circuits.
• Cost-Effective: Offers a balance of performance and affordability.

Additional Details

The ST-1KLB phototransistor has a typical collector-emitter voltage rating, such as 30V, and a collector current rating, for example, 20mA. Its spectral response is optimized for wavelengths in the visible and near-infrared regions, typically between 400nm and 1100nm. The device’s sensitivity is measured in terms of collector current generated per unit of light intensity (e.g., mA/mW/cm²). Key parameters such as dark current (collector current when no light is present) and rise/fall times (speed of response to light changes) are also specified in the datasheet. It's essential to consult the KODENSHI KOREA CORP. datasheet for precise electrical characteristics, optical characteristics, and temperature dependencies to ensure proper circuit design and optimal performance in the intended application. Correct biasing and load resistor selection are crucial for maximizing sensitivity and linearity. Additionally, careful consideration should be given to ambient light conditions to avoid saturation or false triggering. The ST-1KLB is commonly used with a current-limiting resistor to protect the transistor from excessive current flow.