5MM 5516 LDR Photosensitive Resistor
- Product SKU: KG1048
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Specification
Description
5MM 5516 LDR Photosensitive Resistor
The 5MM 5516 LDR resistor is a high-sensitivity ldr light sensor that changes its resistance according to the intensity of ambient light falling on its surface. This Light Dependent Resistor (LDR), also known as a photoresistor, is commonly used in light-sensing applications—such as automatic outdoor light ON/OFF systems or indoor smart lighting controls.
As light exposure increases, the resistance of the sensor decreases, allowing precise detection of brightness variations. Therefore, the 5MM LDR light sensor works effectively in both bright and dark environments. Because photoresistors are simple yet reliable, they remain one of the easiest ways to measure ambient light in electronics.
Built with two Cadmium Sulphide (CdS) photo-conductive cells, this ldr resistor features a spectral response similar to the human eye. As light intensity rises, its resistance falls proportionally. Moreover, it ensures fast response and high reliability in devices such as smoke detectors, automatic lighting systems, batch counters, and burglar alarms.
Technical Details
- Mount: Through Hole
- Number of Pins: 2
- Light Resistance (10 Lux): 5 – 10 kΩ
- Maximum Voltage: 150 V
- Maximum Power: 90 mW
- Spectrum Peak Value: 540 nm
- Dark Resistance: 0.5 MΩ
- Response Time Increase: 30 ms
- Response Time Decrease: 30 ms
- Diameter: 5 mm
- Model: 5516
Analog Applications
- Camera exposure control
- Auto slide focus – dual cell configuration
- Photocopy machines – toner density measurement
- Colorimetric test equipment
- Densitometer systems
- Electronic scales – dual cell sensor
- Automatic gain control – modulated light source
- Automated rear-view mirror systems
Digital Applications
- Automatic headlight dimmer
- Nightlight control circuits
- Oil burner flame-out detection
- Streetlight control systems
- Absence / presence (beam-breaker) sensors
- Position sensing in automation devices
Features
- Accurately senses changes in light intensity
- Easy to use on breadboards or perf boards
- Compatible with microcontrollers and analog/digital ICs
- Compact, low-cost, and widely available
- Fast response time and stable performance
- Eco-friendly design with long-term reliability
- Consistent results across a wide temperature range
Applications
- Automatic streetlight and smart lighting control
- Camera exposure and brightness adjustment
- Nightlight automation and indoor light sensing
- Flame detection and fire-safety systems
- Position and presence detection modules
- Light-based alarm and security systems
- Interactive electronics and educational kits
- Solar-powered lighting and IoT systems
- Industrial light intensity monitoring
- Automatic brightness control in displays
Specifications
| Model | Max Pressure (VDC) | Max Power (mW) | Ambient Temp (°C) | Spectral Peak (nm) | Bright Resistance (Ω) | Dark Resistance (MΩ) | Response Time (ms) |
|---|---|---|---|---|---|---|---|
| 5506 | 150 | 100 | -30 ~ +70 | 540 | 4 – 7 kΩ | 0.5 MΩ | Rise: 30 Fall: 30 |
| 5516 | 150 | 100 | -30 ~ +70 | 540 | 5 – 10 kΩ | 0.5 MΩ | Rise: 30 Fall: 30 |
| 5528 | 150 | 100 | -30 ~ +70 | 540 | 10 – 20 kΩ | 1 MΩ | Rise: 20 Fall: 30 |
| 5537 | 150 | 100 | -30 ~ +70 | 540 | 20 – 30 kΩ | 2 MΩ | Rise: 20 Fall: 30 |
| 5549 | 150 | 100 | -30 ~ +70 | 540 | 100 – 200 kΩ | 10 MΩ | Rise: 20 Fall: 30 |
Drawing (mm)
Package Includes
- 1 × 5MM 5516 LDR Photosensitive Resistor
