5mm 5537 LDR Light Dependent Resistor

Weight 0.002 kg


  • Quick Response
  • Reliable Performance
  • Epoxy or hermetical package 
  • Good Characteristic of Spectrum


Product Name:Photoresistor
Materials:Metal, Electric Parts
LDR Head Dia:5mm
Maximum Voltage: 150 Volt DC
Maximum Wattage: 100mW
Operating Temperature: -30 ~ +70 deg C
Spectral Peak: 540nm
Light Resistance (10 Lux): 18-50 Kohm
Dark Resistance: 2 Mohm
100λ10: 0.7
Response time: 20ms (Rise), 30ms (Down)

The 5537 has the following characteristics

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

This cadmium sulfide (CdS) or light dependent resistor (LDR) whose resistance is inversely dependent on the amount of light falling on it is known by many names including the photo resistor, photoresistor, photoconductor, photoconductive cell, or simply the photocell.

A typical structure for a photoresistor uses an active semiconductor layer that is deposited on an insulating substrate. The semiconductor is normally lightly doped to enable it to have the required level of conductivity. Contacts are then placed either side of the exposed area. The photo-resistor, CdS, or LDR finds many uses as a low cost photo sensitive element and was used for many years in photographic light meters as well as in other applications such as smoke, flame and burglar detectors, card readers and lighting controls for street lamps.