Axil Leaded Resistors

 

Color

Significant Digit

Multiplier

Tolerance

Failure Rate

Black

0

1

+/- 20%

----

Brown

1

10

+/- 1%

1

Red

2

100

+/- 2%

0.1

Orange

3

1000

+/- 3%

0.01

Yellow

4

10000

+/- 4%

0.001

Green

5

100000

----

----

Blue

6

1000000

----

----

Violet

7

10000000

----

----

Gray

8

----

----

----

White

9

----

----

----

Gold

----

----

+/- 5%

----

Silver

----

----

+/- 10%

----

No color band

----

----

+/- 20%

----

 

 

Surface Mount Resistors

 

EIA RESISTOR SIZE

 

METRIC

 

SIZE

L

W

H

REFLOW

WAVE

 

INCH

METR

A

B

C

A

B

C

 

0201

0525

0.6

0.05

0.3

0.05

0.23

0.05

0.28

0.43

0.51

 

 

 

 

0402

1005

1.0

0.05

0.5

0.05

0.35

0.05

0.4

0.6

0.9

 

 

 

0603

1608

1.55

+0.10

0.9

0.1

0.45

0.05

0.5

0.9

1.5

0.9

0.9

1.9

-0.05

0805

2012

2.00

+0.20

1.3

0.15

0.45

0.05

0.7

1.3

1.9

0.9

1.3

2.2

-0.10

1206

3216

3.20

+0.10

1.6

0.15

0.55

0.05

0.9

1.7

2.9

1.1

1.7

3.4

-0.20

1210

3225

3.2

0.2

2.5

0.2

0.55

0.05

0.9

2.5

2.9

1.1

2.5

3.3

1218

3246

3.20

+0.10

4.6

0.15

0.55

0.05

1.05

4.9

2.95

1.25

4.8

3.15

-0.20

2010

5025

5.0

0.15

2.5

0.15

0.6

0.05

1

2.5

4.9

1.2

2.5

5.1

2512

6332

6.3

0.2

3.2

0.15

0.6

0.05

1

3.2

6.2

1.2

3.2

6.4

INCH

SIZE

L

W

H

REFLOW

WAVE

INCH

METR

A

B

C

A

B

C

0201

0525

.024

.012

.009

.011

.017

.020

 

 

 

0402

1005

.039

.020

.014

.016

.024

.035

 

 

 

0603

1608

.061

.033

.018

.020

.035

.059

.035

.035

.075

0805

2012

.079

.049

.018

.028

.051

.075

.035

.051

.087

1206

3216

.126

.063

.022

.035

.067

.114

.043

.067

.134

1210

3225

.126

.098

.022

.035

.098

.114

.043

.098

.130

1218

3246

.126

.181

.022

.041

.193

.116

.049

.189

.124

2010

5025

.197

.098

.024

.039

.098

.193

.047

.098

.201

2512

6332

.248

.124

.024

.039

.126

.244

.047

.126

.252

 

EIA RESISTOR VALUES

20%

10%

5%

2%

1%

<0.5%

E6

E12

E24

E48

E96

E192

100

100

100

100

100

100

101

102

102

104

105

105

105

106

107

107

109

110

110

110

110

111

113

113

114

115

115

115

117

118

118

120

120

120

121

121

121

123

124

124

126

127

127

127

129

130

130

132

130

133

133

133

135

137

137

138

140

140

140

142

143

143

145

150

150

150

147

147

147

149

150

150

152

154

154

154

156

158

158

160

160

162

162

162

164

165

165

167

169

169

169

172

174

174

176

180

180

178

178

178

180

182

182

184

187

187

187

189

191

191

193

200

196

196

196

198

200

200

203

205

205

205

208

210

210

213

220

220

220

215

215

215

218

221

221

223

226

226

226

229

232

232

234

240

237

237

237

240

243

243

246

249

249

249

252

255

255

258

270

270

261

261

261

264

267

267

271

274

274

274

277

280

280

284

300

287

287

287

291

294

294

298

301

301

301

305

309

309

312

330

330

330

316

316

316

320

324

324

328

332

332

332

336

340

340

344

360

348

348

348

352

357

357

361

365

365

365

370

374

374

379

390

390

383

383

383

388

392

392

397

402

402

402

407

412

412

417

430

422

422

422

427

432

432

437

442

442

442

448

453

453

459

470

470

470

464

464

464

470

475

475

481

487

487

487

493

499

499

505

510

511

511

511

517

523

523

530

536

536

536

542

549

549

556

560

560

562

562

562

569

576

576

583

590

590

590

597

604

604

612

620

619

619

619

626

634

634

642

649

649

649

657

665

665

673

680

680

680

681

681

681

690

698

698

706

715

715

715

723

732

732

741

750

750

750

750

759

768

768

777

787

787

787

796

806

806

816

820

820

825

825

825

835

845

845

856

866

866

866

876

887

887

898

910

909

909

909

920

931

931

942

953

953

953

965

976

976

988

 

 

Voltage Divider

The output voltage is proportional to the ratio of the resistor values multiplied by the input voltage.

If you know the input voltage, the desired output voltage, and one resistor, solve for the other.

 

Parallel Resistors

Formula to calculate the equivalent resistance for resistors connected in parallel.

 

If there are only two resistors

 

If there are two resistors of equal value

 

With two parallel resistors, solve for R1 to achieve desired RP if R2 is known

 

50 Ω Resistive Power Divider

 

 

 

 

 

 

 

 

end