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A light-dependent resistor or photo-conductive cell 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.
light-dependent resistors have a very simple structure with very low cost. They are widely used in many different items of electronic equipment including photographic light meters, fire or smoke alarms, burglar alarms, as well as lighting controls for street lamps.
Product Features:
- Epoxy encapsulation
- Good reliability
- Small size
- High sensitivity
- Fast response
- Good spectral characteristics
Specifications :
| Parameters |
Unit |
Min |
Typical |
Max |
| Maximum Voltage |
V |
|
100 |
|
| Maximum Power
Consumption |
mW |
|
50 |
|
| Environmental Temp. |
°C |
-30 |
|
70 |
| Spectrumpeak Value |
nm |
|
540 |
|
| Light Resistance(10Lux) |
LDR3516 |
KΩ |
5 |
|
10 |
| LDR3526 |
10 |
|
20 |
| LDR35371 |
20 |
|
30 |
| LDR35372 |
30 |
|
50 |
| LDR35471 |
50 |
|
100 |
| LDR35472 |
100 |
|
200 |
| Dark Resistance |
LDR3516 |
MΩ |
|
0.6 |
|
| LDR3526 |
|
1 |
|
| LDR35371 |
|
2 |
|
| LDR35372 |
|
3 |
|
| LDR35471 |
|
5 |
|
| LDR35472 |
|
10 |
|
| Response Time |
ms |
|
30 |
|
Notes:
1: Maximum Applied Voltage: the maximum voltage that can be continuously applied to a component in the dark
2: Dark Resistance: resistance value at 10 seconds after 10Lux illumination is turned off
3: Maximum Power Consumption: maximum power consumption when the ambient temperature is 25°C
4: Bright Resistance: after 2 hours of exposure with 400-600Lux light, the test value under 10Lux light of standard light source (color temperature 2856K)
5: γ Value: logarithm of the ratio of the standard resistance value at 10Lux illuminance to 100Lux illuminance
γ= Lg(R10/R100) /Lg (100/10) =Lg(R10/R100)
Dimensions, spectral curve and temperature property:
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