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SMD Resistor Code Calculator
SMD Resistor Code Calculator
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SMD Resistor Code Calculator allows you to determine resistance by the SMD (surface mount device) resistor markings found on the device and to determine SMD resistor markings by resistance. It displays rated resistance and resistor tolerance.
This tool supports 3-digit code, 4-digit code and EIA-96 code.
The 3-digit code is used on ±5% tolerance SMD resistors. The first two numbers indicate the significant digits, and the third is the multiplier. "R" is used to indicate the position of a decimal point. Note: there is no multiplier if "R" is used.
The 4-digit code is used on ±1% tolerance SMD resistors. The first three numbers indicate the significant digits while the last digit is the multiplier. "R" is used to indicate the position of a decimal point. Note: there is no multiplier if "R" is used.
The EIA-96 code is used on ±1% tolerance SMD resistors. It uses three characters (two digits and a letter) in which the digits represent the value (for example, 12 = 12th value of the possible range) and the letter represents the multiplier.
Why You Need an SMD Resistor Code Calculator
For Students
- Helps memorize SMD code notation through practice.
- Saves time in lab work and electronic projects.
- Works smoothly on desktop, tablet, or smartphone.
For Professionals
- Speeds up diagnostics, assembly, and rework.
- Prevents costly mistakes when identifying resistor values.
- Essential for modern electronics, where color bands are no longer used.
For DIY Hobbyists
- Allows you to decode SMD markings without specialized knowledge.
- Simplifies finding replacements for burned or unknown parts.
- A perfect tool for learning basic electronics at home.
Resistor Color Code and SMD Resistor Code Calculator
Frequently Asked Questions
How to Read SMD Resistor Codes on a Smartphone or Laptop PCB?
How to Read SMD Resistor Codes on a Smartphone or Laptop PCB? |
When repairing a modern electronic device, you often need to identify the value of a tiny surface-mounted resistor. For example, you see the code "472" printed on the board. SMD resistor code calculator instantly decodes it as 4.7 kΩ.
Without this tool, you’d have to check long tables or guess the value — especially when markings are faded or partially erased.
Who benefits: smartphone and laptop repair technicians, electronics students, DIY makers working with SMD boards.
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How to Identify SMD Resistors When Designing or Testing PCBs?
How to Identify SMD Resistors When Designing or Testing PCBs? |
During PCB design or prototype testing, an engineer sees codes like "100", "104", "332". The SMD resistor code calculator quickly converts them to 10 Ω, 100 kΩ, 3.3 kΩ, helping verify that the assembly matches the schematic. This is particularly useful when preparing a BOM (Bill of Materials) or checking for soldering or labeling errors.
Who benefits: engineers, QA technicians, R&D specialists, and students learning circuit design.
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How to Find and Replace a Burned SMD Resistor in Home Electronics?
How to Find and Replace a Burned SMD Resistor in Home Electronics? |
When repairing a TV power supply board or charger, you might spot an SMD resistor marked "221". Using the SMD resistor code calculator, you instantly know it means 220 Ω — you can then find a suitable replacement and complete the repair safely and accurately.
Who benefits: home DIY enthusiasts, hobbyists, and anyone fixing small electronic devices.
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