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Audio Transformers:

2 Ohm to 250K Ohm; 150Hz to 75KHz; 1 watt at 1KHz

SURFACE MOUNT

PICO surface mount units utilize materials and methods to withstand extreme temperatures of vapor phase, I.R., and

other reflow procedures without degradation of electrical or mechanical characteristics.

Specifications

MILPRF27

All units manufactured to MILPRF27, Grade 5 Class S.

FREQUENCY RESPONSE: ± 3db, 150 Hz75 KHz at 1.0 Milliwatt. (When primary impedence is greater or

equal to 50K Ohms, ± 3db, 150 Hz20 KHz).

MAXIMUM DISTORTION: 5% with rated power level at 1 KHz, 400 Hz, and 150Hz.

DIELECTRIC STRENGTH: All units tested at 200 V RMS.

INSULATION RESISTANCE: Greater than 10,000 Megohms at 300 V DC.

WEIGHT: 7.5 Grams

TERMINALS: Solderability per MILSTD202, Method 208.

THERMAL SHOCK: 25 Cycles, Method 107, MILSTD202, Test Condition 55º C to +130º C.

MOISTURE SENSITIVITY LEVEL: MSL3

Bottom View

Larger size drawing

Audio Transformers: 2 Ohm to 250K Ohm; 150Hz to 75KHz; 1 watt at 1KHz

PICO Prim

Part Imped

Number Ohms

Secondary

Impedence

Ohms

Split

Windings

SER PAR

CONN CONN

Power Watts

1KHz 400

150

and Hz and Hz and

higher higher higher

1.0

.75

.11

Prim

Unbal

Resist

Current

Ohms

***

Prices

SEC SEC (US $)

SER PAR

CONN CONN

1.0

2.5

3.7

5.2

2.4

6.2

3.7

5.6

1.6

8.5

1.75

5.8

.25

.63

.93

1.3

1.6

.93

1.4

2.8

2.2

3.8

.44

1.5

3.3

1.58:1

1:1

1.73:1

1:1

1.58:1

1:1

3.06:1

1.41:1

1:1

3.54:1

1.73:1

1.22:1

3.16:1

2:1

3.46:1

2:1

3.16:1

2:1

6.12:1

2.83:1

2:1

7.08:1

3.46:1

2.44:1

50.32

Secondary

Resistance

OHMS

Turns Ratio

PRIM/SEC

77203

77205

77210

77215

77218

77220

77225

77228

77230

77235

77240

77245

77250

77255

77260

20ct

32ct

40ct

48ct

8ct

20ct

32ct

40ct

16ct

12.5

3.2

12.5

22.0

18.0

16.0

13.0

11.0

10.0

9.0

8.0

1.75

2.7

4.5

6.6

9.7

10.8

13.5

50ct 50ct

80ct 32ct

100ct 40ct

100ct 100ct

120ct 12.8ct

120ct

150ct

60ct

120ct

12ct

50ct

100ct

PICO Primy

Part

Imped

Number Ohms

Secondary

Impedence

Ohms

Split

Windings

SER PAR

CONN CONN

Power Watts

1KHz 400

150

and Hz and Hz and

higher higher higher

1.0

.75

.11

Prim

Unbal

Resist

Current

Ohms

***

Prices

SEC SEC (US $)

SER PAR

CONN CONN

1.75

6.2

1.75

4.3

109

198

436

1.6

2.3

5.8

19.8

1.75

3.7

5.9

104

116

1.75

10.6

1.75

20.5

6.0

.44

1.6

5.3

9.5

.44

1.1

3.5

10.5

109

.56

1.5

.44

.93

1.5

6.3

.44

2.7

.44

1:1

1:2

1:1

5:1

2.45:1

1.41:1

1:1

1.41:1

5:1

3.16:1

1.83:1

1.41:1

1:1

1:1.58

1:2.24

1:3.16

6.25:1

5.6:1

3.16:1

1.83:1

1:1

1:1.1

6.85:1

4.47:1

3.54:1

1.73:1

1:1

1:1.22

1:1.41

2:1

1:1

2:1

10:1

4.9:1

2.83:1

2:1

1.41:1

10:1

6.32:1

3.65:1

2.83:1

2:1

1.26:1

1:1.12

1:1.58

12.5:1

11.2:1

6.32:1

3.65:1

2:1

1.83:1

13.7:1

8.94:1

7.07:1

3.46:1

2:1

1.41:1

50.32

52.40

50.32

52.40

50.32

Secondary

Resistance

OHMS

Turns Ratio

PRIM/SEC

77265

77270

77275

77280

77285

77290

77295

77300

77305

77310

77315

77320

77325

77330

77335

77340

77342

77344

77345

77347

77350

77355

77360

77365

77367

77370

77375

77380

77385

77386

77387

77390

77395

77400

150ct

200ct

300ct

320ct

400ct

500ct

150ct

600ct

200ct

12ct

50ct

150ct

300ct

600ct

12.8ct

40ct

120ct

200ct

400ct

1000ct

2000ct

4000ct

12.8ct

16ct

50ct

150ct

37.5

150

12.5

37.5

150

3.2

100

250

500

1000

3.2

12.5

37.5

125

150

3.2

7.5

150

300

3.2

8.0

7.0

5.0

4.5

4.0

3.5

500ct 500ct

*500ct 500ct

500ct 600ct

600ct 12.8ct

600ct

30ct

600ct

48ct

600ct 200ct

600ct 600ct

*600ct 600ct

*600ct 900ct

600ct 1200ct

640ct

700ct

800ct

12.8ct

100ct

12.8ct

7.07:1 14.14:1 50.32

2.65:1 5.29:1 50.32

7.91:1 15.8:1 50.32

77405

77410

77415

77417

77420

77425

77430

77435

77440

77445

77450

77455

77460

77465

77470

77475

77480

800ct

48ct

800ct

200

150

12.5

250

3.2

125

300

125

3.2

1.0

.75

.11

3.5

3.0

2.5

115

100

115

122

113

109

140

150

140

102

1.75

5.8

103

1.75

155

150

1.75

168

1.75

1.5

.44

1.5

.44

4.08:1

1:1

8.16:1

2:1

50.32

900ct 600ct

*900ct 900ct

1000ct 12ct

1000ct 50ct

1000ct 1000ct

1060ct

1200ct

*1200ct

1500ct

*1500ct

1600ct

12.8ct

500ct

1200ct

12ct

500ct

600ct

1500ct

12.8ct

1.23:1 2.45:1 50.32

1:1

52.40

9.13:1 18.26:1 50.32

4.47:1 8.94:1 50.32

1:1

2:1

50.32

9.1:1

9.68:1

1.55:1

1:1

18.2:1

19.4:1

3.1:1

2:1

50.32

52.40

11.18:1 22.36:1 50.32

1.73:1 3.46:1 50.32

1.58:1

52.40

1:1

52.40

11.18:1 22.36:1 50.32

PICO

Part

Num.

Prim

Imped

Ohms

Secondary

Impedence

Ohms

Split

Windings

SER

PAR

CONN CONN

Power Watts

1KHz 400

150

and Hz and Hz and

higher higher higher

1.0

.66

.75

.66

.11

Prim

Unbal

Resist

Curr

Ohms

Secondary

Resistance

OHMS

SER PAR

CONN CONN

1.0

255

240

1015

268

295

368

413

2.5

108

955

620

268

925

1.75

106

153

1020

1.6

1.7

106

145

160

300

610

932

1075

985

.25

254

103

.65

155

1.5

2.8

16.5

.44

26.5

.43

2.5

153

233

269

Turns Ratio

PRIM/SEC

SEC SEC

SER PAR

CONN CONN

15.8:1

1:1

1:2

1:1

15.8:1

2.58:1

31.6:1

2:1

1:1

2:1

31.6:1

5.16:1

***

Price

(US $)

77483 2000ct

77485 2000ct

77490 *2000ct

77495 2000ct

77497 2500ct

77500 3000ct

77505 *3000ct

77510 3600ct

77512 4000ct

77514 4000ct

77515 4000ct

77520 *4000ct

77525 5000ct

77530 5000ct

77535 7500ct

77540 7500ct

77545 7500ct

77550 7500ct

77555 *7500ct

77560 8000ct

77565

77570

77575

77580

77585

77590

77595

77600

77605

77610

77615

77620

77625

77630

77635

77640

77645

77650

77652

77655

8000ct

*8000ct

*9000ct

10,000ct

8ct

2000ct

8000ct

2500ct

3000ct

3600ct

16ct

600ct

1000ct

8000ct

500ct

5000ct

50ct

100ct

600ct

2500ct

7500ct

12.8ct

1000ct

1200ct

9000ct

12.8ct

16ct

100ct

200ct

500ct

600ct

1000ct

1200ct

500

2000

625

750

900

150

250

125

1250

12.5

150

625

3.2

250

3.2

125

150

250

300

375

500

1250

1875

2500

100

125

150

2.0

1.8

1.5

1.3

1.0

0.8

250

185

175

185

245

267

300

395

390

450

670

765

695

715

925

768

756

780

715

1165

50.32

52.40

50.32

52.40

50.32

55.85

2:1

4:1

1:1.41

3.16:1 6.32:1

1:1

2:1

12.25:1 24.5:1

8.66:1 17.32:1 55.85

3.54:1 7.07:1 55.85

1.73:1 3.46:1 55.85

1:1

61.59

25:1

50:1 55.85

2.83:1

2.58:1

1:1

28:1

25:1

10:1

5.66:1

56:1

50:1

20:1

55.85

61.59

55.85

7.07:1 14.14:1 55.85

4.47:1 8.94:1 55.85

4.08:1 8.16:1 55.85

3.16:1 6.32:1 55.85

2.89:1 5.77:1 55.85

2.58:1

2.24:1

1.41:1

1.16:1

1:1

5.16:1

4.47:1

2.83:1

2.31:1

2:1

55.85

10,000ct 1500ct

10,000ct 2000ct

10,000ct 5000ct

10,000ct 7500ct

10,000ct 10,000ct

*10,000ct 10,000ct

15,000ct 400ct

15,000ct 500ct

15,000ct 600ct

1:1

61.59

6.12:1 12.25:1 55.85

5.48:1 10.95:1 55.85

5:1

10:1 55.85

77660 15,000ct 10,000ct

77665

77670

77675

77680

77685

77690

77695

77700

77705

77710

*15,000ct 15,000ct

15,000ct 15,000ct

16,000ct 1000ct

20,000ct 500ct

20,000ct 600ct

20,000ct

*20,000ct

800ct

1000ct

5000ct

10,000ct

20,000ct

2500

3750

250

125

150

200

250

1250

2500

.66

.62

.66

.62

.11

0.8

0.7

1165

1560

1750

1715

1050

1600

108

135

610

1075

2370

263

400

20.5

24.5

153

269

1.22:1

2.45:1

55.85

1:1

61.59

1:1

2:1

55.85

4:1

8:1

55.85

6.32:1 12.65:1 55.85

5.77:1 11.55:1 59.90

5:1

4.47:1

2:1

1.41:1

1:1

10:1

8.94:1

4:1

2.83:1

61.59

PICO

Part

Num.

Prim

Imped

Ohms

Secondary

Impedence

Ohms

Split

Windings

SER

PAR

CONN CONN

Power Watts

1KHz 400

150

and Hz and Hz and

higher higher higher

.33

.25

.16

.12

.11

.074

.05

.04

.33

.25

.16

.12

.11

.074

.05

.04

.11

.10

.074

.05

.04

Prim

Unbal

Resist

Curr

Ohms

Secondary

Resistance

OHMS

SER PAR

CONN CONN

106

6.2

156

620

1090

3740

300

548

3075

4350

6270

1650

1690

9920

1350

1635

8.5

140

248

1075

9.5

133

1350

3000

118

1.6

15.3

155

272

137

769

1568

412

1.5

423

2480

338

410

2.2

3.5

15.5

270

2.4

336

750

Turns Ratio

PRIM/SEC

SEC

SER

PAR

CONN CONN

***

Price

(US

77715

77720

77725

77730

77732

77734

77735

77740

77745

77750

77755

77760

77765

77770

77775

77777

77778

77779

77780

77785

77787

77789

77790

77795

77800

77805

77810

77813

77814

77815

77820

77823

77825

77830

77835

25,000ct

30,000ct

500ct

1000ct

50ct

1200ct

500ct

125

250

12.5

300

125

1250

2500

100

500

1000

5000

0.6

0.5

0.4

0.3

0.25

0.2

2470

2730

2815

2730

3150

3940

4275

4500

5960

7200

7500

9550

10,000

13,700

17,340

7.07:1 14.14:1 62.19

5:1

10:1 61.59

24.5:1 49:1 61.59

5:1

10:1 62.19

7.7:1 15.5:1 62.19

12.2:1

2.45:1

1.73:1

1:1

10:1

4.47:1

3.16:1

1.41:1

1:1

15.8:1

24.5:1

4.9:1

3.46:1

20:1

8.94:1

6.32:1

2.83:1

31.6:1

62.19

66.77

74.47

30,000ct 200ct

30,000ct 5000ct

30,000ct 10,000ct

*30,000ct 30,000ct

40,000ct 400ct

40,000ct

*40,000ct

50,000ct

2000ct

4000ct

20,000ct

40,000ct

200ct

50,000ct 500ct

125

50,000ct 600ct

150

50,000ct 50,000ct 12,500

60,000ct 15,000ct 3750

62,500ct

50ct

12.5

80,000ct

90,000ct

95,000ct

100,000ct

15,000ct 3750

80,000ct 20,000

10,000ct 2500

15,000ct 3750

60ct

125

250

500

2500

20.5

125

250

2500

5000

250

10:1

20:1 74.47

9.13:1 18.26:1 74.47

1:1

2:1

74.47

2:1

4:1

80.63

35.4:1 70.7:1 80.63

2.3:1

1:1

3:1

2.5:1

40.8:1

4.6:1

2:1

6:1

5:1

81.6:1

80.63

84.28

100,000ct 100ct

100,000ct 500ct

100,000ct 1000ct

100,000ct 2000ct

100,000ct 10,000ct

135,000ct 82ct

200,000ct 500ct

200,000ct 1000ct

200,000ct 10,000ct

200,000ct 20,000ct

31.6:1 63.2:1 84.28

14.1:1 28.3:1 84.28

10:1

20:1 84.28

7.07:1 14.14:1 84.28

3.16:1 6.32:1 84.28

40.6:1

20:1

14.1:1

4.47:1

3.16:1

35.4:1

15.8:1

81.2:1

40:1

28.3:1

8.94:1

6.32:1

70.7:1

31.6:1

88.17

90.40

77837 250,000ct 200ct

77840 250,000ct 1000ct

* INCLUDES ELECTROSTATIC SHIELD

***Discount Prices:

19 Net;

1024 less 10%;

2549 less 16%;

5099 less 23%;

100499 less 30%

Ordering Instructions:

No minimum.

Net 30 days F.O.B. Pelham, NY

Deliverystock to one week for sample orders.

Features

Extreme resistance to thermal shock

Ultra Miniature size

PICO is approved QPL source (MILPRF

27)

Magnetic shields available

Electrostatic shielding can be added

Variation of standard designs available

Primary and secondary windings can be

used either as input or output

Every unit in this catalog can be made with a

300 thermal cycle guarantee using PICO's

special SR construction. Contact factory for

details.

Schematics

for Transformers

with Electrostatic Shield

Schematics

for Transformers

with Split Secondaries

Click Here For Plugin Version of the 77000 Series

RECOMMENDED LAND PATTERN

DIMENSIONS