Product Information

A light dependent resistor (LDR), also known as a photoresistor, is a component whose resistance changes with the intensity of ambient light. When light shines on the photoresistor, the photon energy excites the electrons in the photosensitive material, causing them to jump into the conduction band, causing the resistance value to change. The resistance value of the photoresistor is inversely proportional to the light intensity. The stronger the light, the smaller the resistance value; the weaker the light, the greater the resistance value.

Features

5506 LDR

• Photo Resistance (2 ~ 6 KΩ)
• Dark Resistance (0.15 MΩ) min 
• Vmax – 100VDC
• Pmax – 90mW
• 5mm Package

5516 LDR

• Photo Resistance (5 ~ 10 KΩ)
• Dark Resistance (0.2 MΩ) min 
• Vmax – 100VDC
• Pmax – 90mW
• 5mm Package

5528 LDR

• Photo Resistance (8 ~ 20 KΩ)
• Dark Resistance (1 MΩ) min 
• Vmax – 150VDC
• Pmax – 100mW
• 5mm Package

5537 LDR

• Photo Resistance (16 ~ 50 KΩ)
• Dark Resistance (2 MΩ) min 
• Vmax – 150VDC
• Pmax – 100mW
• 5mm Package

5539 LDR

• Photo Resistance (30 ~ 90 KΩ)
• Dark Resistance (5 MΩ) min 
• Vmax – 150VDC
• Pmax – 100mW
• 5mm Package

5549 LDR

• Photo Resistance (45 ~ 140 KΩ)
• Dark Resistance (10 MΩ) min 
• Vmax – 150VDC
• Pmax – 100mW
• 5mm Package

Applications

As an electronic component that is sensitive to light, photoresistor has a wide range of application scenarios. Here are some common applications:

• Automatic control and measurement: Photoresistor can be used in automatic control systems and measurement equipment, such as photoelectric switches, photoelectric counters, photocurrent measurement, etc. These devices utilize the sensitivity of photoresistors to light to achieve automatic control and measurement functions.
• Camera automatic exposure: The automatic exposure system in the camera uses a photoresistor to detect scene light and automatically adjusts the exposure time and aperture size according to the light intensity to achieve accurate exposure.
• Solar application: Photoresistor can be used in solar photovoltaic systems to detect the intensity of sunlight and control the output power of solar panels.
• Lighting control: Photoresistor can be used to control various lighting equipment, such as street lights, lawn lights, garden lights, etc. These devices use photosensitive resistors to detect light intensity to realize automatic switching and brightness adjustment functions of lights.
• Toys and entertainment equipment: Photoresistors are also widely used in various toys and entertainment equipment, such as light-controlled music cups, light-controlled toys, etc. These devices use photoresistors to detect light intensity to achieve a variety of interesting functions.

Parameters