In electronics, international standard IEC 60063 defines another preferred number series for resistors, capacitors, inductors and Zener diodes. It works similarly to the Renard series, except that it subdivides the interval from 1 to 10 into 6, 12, 24, etc. steps. These subdivisions ensure that when some arbitrary value is replaced with the nearest preferred number, the maximum relative error will be on the order of 20%, 10%, 5%, etc.

Use of the E series is mostly restricted to resistors, capacitors, inductors and Zener diodes. Commonly produced dimensions for other types of electrical components are either chosen from the Renard series instead (for example fuses) or are defined in relevant product standards (for example wires).

The IEC 60063 numbers are as follows. The E6 series is every other element of the E12 series, which is in turn every other element of the E24 series:

		E6 (20%):

10

15

22

33

47

68

 
		E12 (10%):

10

12

15

18

22

27

33

39

47

56

68

82


			
		E24 (5%):

10

12

15

18

22

27

33

39

47

56

68

82

11

13

16

20

24

30

36

43

51

62

75

91


			

With the E48 series, a third decimal place is added, and the values are slightly adjusted. Again, the E48 series is every other value of the E96 series, which is every other value of the E192 series:

		E48 (2%):

100

121

147

178

215

261

316

383

464

562

681

825

105

127

154

187

226

274

332

402

487

590

715

866

110

133

162

196

237

287

348

422

511

619

750

909

115

140

169

205

249

301

365

442

536

649

787

953


			
		E96 (1%):

100

121

147

178

215

261

316

383

464

562

681

825

102

124

150

182

221

267

324

392

475

576

698

845

105

127

154

187

226

274

332

402

487

590

715

866

107

130

158

191

232

280

340

412

499

604

732

887

110

133

162

196

237

287

348

422

511

619

750

909

113

137

165

200

243

294

357

432

523

634

768

931

115

140

169

205

249

301

365

442

536

649

787

953

118

143

174

210

255

309

374

453

549

665

806

967


			
		E192 (0.5%)

100

121

147

178

215

261

316

383

464

562

681

825

101

123

149

180

218

264

320

388

470

569

690

835

102

124

150

182

221

267

324

392

475

576

698

845

104

126

152

184

223

271

328

397

481

583

706

856

105

127

154

187

226

274

332

402

487

590

715

866

106

129

156

189

229

277

336

407

493

597

723

876

107

130

158

191

232

280

340

412

499

604

732

887

109

132

160

193

234

284

344

417

505

612

741

898

110

133

162

196

237

287

348

422

511

619

750

909

111

135

164

198

240

291

352

427

517

626

759

920

113

137

165

200

243

294

357

432

523

634

768

931

114

138

167

203

246

298

361

437

530

642

777

942

115

140

169

205

249

301

365

442

536

649

787

953

117

142

172

208

252

305

370

448

542

657

796

965

118

143

174

210

255

309

374

453

549

665

806

976

120

145

176

213

258

312

379

459

556

673

816

988


			

The E192 series is also used for 0.25% and 0.1% tolerance resistors.

1% resistors are available in both the E24 values and the E96 values.