5mm Light Dependent Resistor LDR Sensor changes resistance with the change in the ambient light exposure on the surface of the sensor. 5mm LDR  Sensor (Light Dependent Resistor) is a type of photocell which finds excellent use in light sensing device application, whether it is automatic outdoor light ON/OFF switch or Indoor automatic light switch. The sensor works best in both Light and dark region.
Two Cadmium Sulphide (CDs) Photo Conductive Cells with spectral responses similar to that of the human eye. Cell resistance falls with increasing light intensity. An application includes smoke detection, Automatic lighting control, batch counting and burglar alarm systems.


  1. Diameter: 5mm
  2. No. of Pins: 2
  3. Type of Mounting: PCB Through Hole
  4. Maximum Operating Temperature: +800C (Approx.)
  5. Dark resistance:1-20M ohm


  1. Maximum Voltage (V-dc): 150V
  2.  Maximum Power Consumption (mW): 100W
  3.  Temperature (°C): –30 – +70
  4.  Spectrum Peak Value (nm): 540 OD
  5.  Bright Resistance (10Lux) (KΩ): < 45
  6.  Dark Resistance (MΩ): > 200
  7.  Light resistance: < 8 k
  8.  Dark resistance: > 20 megohm
  9.  100¦Ë10: 0.6
  10.  Response Time (ms): Up: 20/ Down: 30
  11.  Light Resistance Characteristic: 3
  12.  The length of the pins: > 2.5 CM/0.98″
  13.  Material: Carbon
  14.  Performance: General
  15.  Shape: cylindrical
  16.  Size: 5 x 3mm/0.2 x 0.12″

Analog Applications:

  1. Camera Exposure control
  2. Auto slide focus – dual cell
  3. Photocopy machines – density of toner
  4. Colorimetric Test Equipment
  5. Densitometer
  6. Electronics scales – dual cell
  7. Automatic gain control – modulated light source
  8. Automated Rear View Mirror

Digital Applications:

  1. Automatic Headlight Dimmer
  2. Nightlight control
  3. Oil burner flame out
  4. Streetlight control
  5. Absence / Presence (Beam breaker)
  6. Position sensor

Package Includes :

1 x 5mm Light Dependent Resistor LDR Sensor
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Additional information

Weight 0.1 kg


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