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Standard Resistor Values

HPE Invents 1st Memristor Laser*

"Researchers at Hewlett Packard Labs, where the first practical memristor was created, have invented a new variation on the device - a memristor laser..." Also, "From Transistor to Memristor: Switching Technologies for the Future."

Related Pages on RF Cafe

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- Resistor Markings

- Mil-55342 Markings

- Resistance Conversions

- Resistor Vendors

- Resistivity of Metals & Alloys

- Parallel Water Filters Like Parallel Resistors

- Superconductivity

Resistors are one of the four fundamental types of passive electronic components; the other three are the inductor, the capacitor, and the memristor. The basic unit of resistance is the ohm (Ω).

Standard base resistor values are given in the following tables for the most commonly used tolerances (1%, 2%, 5%, 10%), along with typically available resistance ranges. To determine values other than the base, multiply the base value by 1, 10, 100, 1k, or 10k.

Standard resistor values are calculated using the simple formula given below. Round the results to the proper number of significant figures (three for 1% and 2%, two for 5% and 10%). As the chart at the right shows (created in Excel), plotting the values on a logarithmic scale results in a straight line due to the exponential in the equation.

Standard resistor value equation - RF Cafe Resistor calculation equation definitions - RF Cafe

Example: Calculations indicate the need for a 355 kΩ resistor and a tolerance of 1%. Look in the 1% table and select the 35.7 value (the nearest available standard value). Multiply by 10,000 to convert to 357 kΩ.

1% Standard Values (EIA E96) Decade multiples are available from 10.0 Ω through 1.00 MΩ (also 1.10 MΩ, 1.20 MΩ, 1.30 MΩ, 1.50 MΩ, 1.60 MΩ, 1.80 MΩ, 2.00 MΩ and 2.20 MΩ)
10.0	10.2	10.5	10.7	11.0	11.3	11.5	11.8	12.1	12.4	12.7	13.0
13.3	13.7	14.0	14.3	14.7	15.0	15.4	15.8	16.2	16.5	16.9	17.4
17.8	18.2	18.7	19.1	19.6	20.0	20.5	21.0	21.5	22.1	22.6	23.2
23.7	24.3	24.9	25.5	26.1	26.7	27.4	28.0	28.7	29.4	30.1	30.9
31.6	32.4	33.2	34.0	34.8	35.7	36.5	37.4	38.3	39.2	40.2	41.2
42.2	43.2	44.2	45.3	46.4	47.5	48.7	49.9	51.1	52.3	53.6	54.9
56.2	57.6	59.0	60.4	61.9	63.4	64.9	66.5	68.1	69.8	71.5	73.2
75.0	76.8	78.7	80.6	82.5	84.5	86.6	88.7	90.9	93.1	95.3	97.6

2% Standard Values (EIA E48) Decade multiples are available from 10 Ω through 22 MΩ
10.0	10.5	11.0	11.5	12.1	12.7	13.3	14.0	14.7	15.4	16.2	16.9
17.8	18.7	19.6	20.5	21.5	22.6	23.7	24.9	26.1	27.4	28.7	30.1
31.6	33.2	34.8	36.5	38.3	40.2	42.2	44.2	46.4	48.7	51.1	53.6
56.2	59.0	61.9	64.9	68.1	71.5	75.0	78.7	82.5	86.6	90.9	95.3

5% Standard Values (EIA E24) Decade multiples are available from 10 Ω through 22 MΩ
10	11	12	13	15	16	18	20	22	24	27	30
33	36	39	43	47	51	56	62	68	75	82	91

10% Standard Values (EIA E12) Decade multiples are available from 10 Ω through 1 MΩ
10	12	15	18	22	27	33	39	47	56	68	82

* A nimrod keeps contacting me to say there is no such thing as a real memristor.

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