Standard EIA Decade Values

Preferred Resistor Value Series Explained

The Electronic Industries Alliance (EIA), aligned with IEC standards, defines standard decade values for resistors to ensure consistency, interchangeability, and efficient manufacturing in electronic component design. These preferred values are organized into series—E6, E12, E24, E48, E96, and E192—each representing a set of resistor values spaced logarithmically within each decade, tailored to different tolerance classes.

Understanding the EIA Preferred Value Series

Series Overview:

The number following “E” indicates how many logarithmic steps are in each decade (a tenfold increase in resistance).

E6 (±20%) – 6 values per decade, rarely used today.
E12 (±10%) – 12 values per decade, standard for general applications.
E24 (±5%, ±2%) – 24 values per decade, used for medium tolerance needs.
E48, E96 (±1%) – Higher precision with 48 and 96 values per decade.
E192 (±0.1%, ±0.25%, ±0.5%) – Ultra-high precision with 192 steps per decade for critical applications.

EIA Series Tables Sample

E-6 Series (±20%)
10	15	22	33	47	68

E-12 Series (±10%)
10	12	15	18	22	27	33	39	47	56	68	82

E-24 Series (±5%, ±2%)
10	11	12	13	15	16	18	20	22	24	27	30
33	36	39	43	47	51	56	62	68	75	82	91

E-96 Series (±1%)
100	102	105	107	110	113	115	118	121	124	127	130
133	136	140	143	147	150	154	158	162	165	169	174
178	182	187	191	196	200	205	210	215	221	226	232
237	243	249	255	261	267	274	280	287	294	301	309
316	324	332	340	348	357	365	374	383	392	402	412
422	432	442	453	464	475	487	499	511	523	536	549
562	576	590	604	619	634	649	665	681	698	715	732
750	768	787	806	825	845	866	887	909	931	953	976

E-192 Series (±0.1%, ±0.25%, ±0.50%)
100	101	102	104	105	106	107	109	110	111	113	114
115	117	118	120	121	123	124	126	127	129	130	132
133	135	137	138	140	142	143	145	147	149	150	152
154	156	158	160	162	164	165	167	169	172	174	176
178	180	182	184	187	189	191	193	196	198	200	203
205	208	210	213	215	218	221	223	226	229	232	234
237	240	243	246	249	252	255	258	261	264	267	271
274	277	280	284	287	291	294	298	301	305	309	312
316	320	324	328	332	336	340	344	348	352	357	361
365	370	374	379	383	388	392	397	402	407	412	417
422	427	432	437	442	448	453	459	464	470	475	481
487	493	499	505	511	517	523	530	536	542	549	556
562	569	576	583	590	597	604	612	619	626	634	642
649	657	665	673	681	690	698	706	715	723	732	741
750	759	768	777	787	796	806	816	825	835	845	856
866	876	887	898	909	920	931	942	953	965	976	988

Custom Values and Specialty Components

RCD Components, with decades of specialty manufacturing experience, offers not only these standard preferred values but also a full range of intermediate and custom resistor values to suit unique applications, often with minimal additional cost. So whether you need a common E12 series resistor or a precision value like 12,345.6789Ω, RCD can accommodate your requirement.

Why EIA Standard Values Matter

Interchangeability: Standard values ensure that components from different manufacturers fit your design specifications without modification.
Inventory Optimization: Using preferred values reduces the complexity and cost of stocking and sourcing resistors.
Design Efficiency: Engineers can select resistor values with predictable tolerances and availability worldwide.

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