Resistor Code Calculator SMD

Resistor Value Formula:

\[ R = (digit1 \times 10 + digit2) \times 10^{multiplier} \]

Resistance (Ω):

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1. What is a Resistor Code Calculator SMD?

Definition: This calculator determines the resistance value of SMD (Surface Mount Device) resistors based on their 3-digit code.

Purpose: It helps electronics engineers, technicians, and hobbyists quickly decode SMD resistor markings.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = (digit1 \times 10 + digit2) \times 10^{multiplier} \]

Where:

\( R \) — Resistance value (ohms)
\( digit1 \) — First significant digit (0-9)
\( digit2 \) — Second significant digit (0-9)
\( multiplier \) — Power of ten multiplier (-2 to 9)

Explanation: The first two digits form the base number, which is multiplied by 10 raised to the power of the third digit.

3. Importance of SMD Resistor Codes

Details: SMD resistors are marked with numeric codes due to their small size. Understanding these codes is essential for circuit design and repair.

4. Using the Calculator

Tips: Enter the three-digit code from your SMD resistor. The first two digits are numbers (0-9), and the third is the multiplier exponent.

5. Frequently Asked Questions (FAQ)

Q1: What does "SMD" stand for?
A: Surface Mount Device - small components designed for mounting directly onto PCB surfaces.

Q2: How do I read a 3-digit SMD resistor code?
A: First two digits are significant figures, third digit is the multiplier (power of ten).

Q3: What about resistors with 4-digit codes?
A: For 4-digit codes, the first three digits are significant figures and the fourth is the multiplier.

Q4: What does a multiplier of 0 mean?
A: A multiplier of 0 means ×1 (10^0 = 1).

Q5: How are values below 10Ω represented?
A: Values below 10Ω use 'R' to indicate the decimal point (e.g., 4R7 = 4.7Ω).