A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photoresistor can be applied in light-sensitive detector circuits, and light-activated and dark-activated switching circuits. A photoresistor is made of a high resistance semiconductor. In the dark, a photoresistor can have a resistance as high as several megohms (MΩ), while in the light, a photoresistor can have a resistance as low as a few hundred ohms (Ω). Photoresistor is widely used in many industries, such as toys, lamps, camera etc.
| Maximum Voltage | 150 VDC |
| Mazimum Wattage | 100 mW |
| Operating Temperature | -30 oC to +70 oC |
| Spectral Peak | 540 nm |
| Light Resistance | 8 - 20 KΩ |
| Dark Resistance | 1 MΩ |
| Sensitivity | 0.8 |
| Response Time Rise | 20 ms |
| Response Time Down | 30 ms |
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