Is 51,000 22 a standard value for a 5% resistor?
The correct answer and explanation is :
No, 51,000 22 (or 51000 22) is not a standard value for a 5% resistor.
Explanation (Approx. 300 Words):
Resistors are manufactured in preferred values according to standardized series called the E-series, which are defined by the IEC (International Electrotechnical Commission). For resistors with 5% tolerance, the E24 series is used. This series contains 24 logarithmically spaced values per decade, meaning each value is multiplied by powers of 10 to cover a full range. The goal is to ensure that resistor values are spaced far enough apart that their 5% tolerance ranges don’t overlap excessively.
Some standard E24 resistor values (for 5% tolerance) in the 10k to 100k range include:
- 10k, 11k, 12k, 13k, 15k, 16k, 18k, 20k, 22k, 24k, 27k, 30k, 33k, 36k, 39k, 43k, 47k, 51k, 56k, 62k, 68k, 75k, 82k, 91k
Among these, 51k is a standard E24 value, but 51,000 22 is not a valid format or a recognized standard resistor value.
Let’s break down “51,000 22”:
- “51,000” could be interpreted as 51kΩ.
- “22” does not fit the standard notation. It could possibly be misread from a resistor color code (Red-Red) or could refer to a batch or manufacturer-specific code, but it’s not part of standard resistance value notation.
In standard resistor labeling:
- Values are usually printed directly (e.g., 51K) or coded using the resistor color code.
- A resistor marked “51kΩ” ±5% is a standard 5% resistor.
If you physically see a component labeled “51000 22,” it’s likely a manufacturer’s internal part number, or you’re reading a resistor network, not a single resistor value. It would be advisable to consult the datasheet or manufacturer’s documentation for precise identification.