Photoresistors, also known as light-dependent resistors (LDRs), are categorized into three parts in their model naming system. The first part consists of letters that represent the main type or category of the component. The second part is made up of numbers that indicate the specific application or characteristics of the resistor. Finally, the third part is a serial number used to distinguish different sizes and performance parameters of the product. This structure helps users identify and select the right photoresistor for their needs.
| Part I: Main Name | Part II: Use or Characteristics | Part III: Serial Number |
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Letter |
Meaning |
Number |
Meaning |
|
Mg |
Photoresistance |
0 |
Special |
The serial number is a number used to differentiate between various dimensions and performance specifications of the resistor. |
1 |
Ultraviolet Light |
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2 |
Ultraviolet Light |
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3 |
Ultraviolet Light |
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4 |
Visible Light |
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5 |
Visible Light |
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6 |
Visible Light |
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7 |
Infrared Light |
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8 |
Infrared Light |
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9 |
Infrared Light |
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Example: Mg45-14 (visible light sensitive resistor). In this example:
- 4 – indicates visible light sensitivity
- 5 – represents the specific characteristic or application
- 14 – is the serial number that identifies the exact size and performance level of the resistor
- Mg – stands for photoresistor
- G – denotes a general-purpose or standard photoresistor
Understanding the naming convention of photoresistors can be very helpful when selecting components for electronic circuits that require light-sensitive functionality. Whether you're working with ultraviolet, visible, or infrared light, knowing how to interpret the model number ensures you choose the right component for your project.
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