PDF version

Low Profile Audio Transformers

New Surface Mount (.24" Ht. x .55" x.55")

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

  • MIL-PRF-27: All units manufactured to MIL-PRF-27. Grade 5, Class S.
  • FREQUENCY RESPONSE:± 3dB, 300 Hz-50 KHz at 1.0 Milliwatt.
  • MAXIMUM DISTORTION: 5% with rated power level at 1 KHz. 
  • DIELECTRIC STRENGTH: All units tested at 200 V RMS. 
  • INSULATION RESISTANCE: Greater than 10,000 Megohms at 300 V DC. 
  • WEIGHT: 3 Grams 
  • OPERATING TEMPERATURE: -55º C to +130º C 
  • TERMINALS: Solderability per MIL-STD-202, Method 208.
  • THERMAL SHOCK: 25 Cycles, Method 107, MIL-STD-202, Test Condition -55º C to +130º C.
  • MOISTURE SENSITIVITY LEVEL: MSL3

Low Profile Audio Transformers

PICO
Part
Number
Primary
Impedence
Ohms
Secondary
Impedence
Ohms
Split
Windings
Power Watts
Primary
Unbal
DC
Current
ma
Primary
DC
Resistance
Ohms
Secondary
DC
Resistance
Ohms
Turns/Ratio
Prim/Sec

PICO
Prices
1-9**
(US $)

Ser
Par
1 Khz
and
Higher
300Hz
and
Higher
Ser
Conn
Par
Conn
SEC
Ser
Conn
SEC
Par
Conn
78003
78005
78010
78015
78020
10ct
20ct
20ct
32ct
40ct
10ct
8ct
20ct
32ct
40ct
2.5
2
5
8
10
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
31.6
22.3
22.3
17.6
15.8
.83
1.66
1.66
2.66
3.33
1.16
.93
2.33
3.73
4.66
.29
.23
.58
.93
1.16
1:1
1.58:1
1:1
1:1
1:1
2:1
3.16:1
2:1
2:1
2:1
73.75
73.75
73.75
73.75
73.17
78025
78030
78035
78040
78045
48ct
50ct
80ct
100ct
100ct
16ct
50ct
32ct
40ct
100ct
4
12.5
8
10
25
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
14.4
14.1
11.1
10
10
4
4.16
6.66
8.33
8.33
1.86
5.8
3.73
4.66
11.6
.46
1.45
.93
1.16
2.91
1.73:1
1:1
1.58:1
1.58:1
1:1
3.46:1
2:1

3.16:1
3.16:1
2:1
67.04
67.04
73.17
73.17
67.04
78050
78055
78060
78065
78070
120ct
120ct
120ct
150ct
150ct
12.8ct
60ct
120ct
12ct
50ct
3.2
15
30
3
12.5
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
9.1
9.1
9.1
8.2
8.2
10
10
10
12.5
12.5
1.49
7
14
1.4
5.8
.37
1.75
3.5
.35
1.45
3.06:1
1.41:1
1:1
3.54:1
1.73:1
6.12:1
2.83:1
2:1
7.08:1
3.46:1
67.04
80.18
80.18
77.63
80.18
PICO
Part
Number
Primary
Impedence
Ohms
Secondary
Impedence
Ohms
Split
Windings
Power Watts
Primary
Unbal
DC
Current
ma
Primary
DC
Resistance
Ohms
Secondary
DC
Resistance
Ohms
Turns/Ratio
Prim/Sec

PICO
Prices
1-9**
(US $)

Ser
Par
1 Khz
and
Higher
300Hz
and
Higher
Ser
Conn
Par
Conn
SEC
Ser
Conn
SEC
Par
Conn
78075
78080
78085
78090
78095
150ct
150ct
150ct
200ct
300ct
100ct
150ct
600ct
200ct
12ct
25
37.5
150
50
3
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
8.2
8.2
8.2
7
5.8
12.5
12.5
12.5
16.6
25
11.6
17.5
70
23.3
1.4
2.91
4.37
17.5
5.83
.35
1.22:1
1:1
1:2
1:1
5:1
2.45:1
2:1
1:1
2:1
10:1
80.18
80.18
80.18
80.18
80.18
78100
78105
78110
78115
78120
300ct
300ct
300ct
300ct
320ct
50ct
150ct
300ct
600ct
12.8ct
12.5
37.5
75
150
3.2
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
5.8
5.8
5.8
5.8
5.6
25
25
25
25
26.6
5.8
17.5
35
70
1.49
1.45
4.37
8.75
17.5
.37
2.45:1
1.41:1
1:1
1:1.41
5:1
4.9:1
2.83:1
2:1
1.41:1
10:1
80.18
80.18
80.18
72.88
85.97
78125
78130
78135
78140
78145
400ct
400ct
400ct
400ct
400ct
40ct
120ct
200ct
400ct
1000ct
10
30
50
100
250
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
5
5
5
5
5
33.3
33.3
33.3
33.3
33.3
4.66
14
23.3
46.6
116.6
1.16
3.5
5.83
11.66
29.16
3.16:1
1.83:1
1.41:1
1:1
1:1.58
6.32:1
3.65:1
2.83:1
2:1
1.26:1
85.97
85.97
85.97
78.18
85.97
78150
78155
78160
78165
78170
400ct
400ct
500ct
500ct
500ct
2000ct
4000ct
12.8ct
16ct
50ct
500
1000
3.2
4
12.5
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
5
5
4.5
4.5
4.5
33.3
33.3
41.6
41.6
41.6
233.3
466.6
1.49
1.86
5.83
58.3
116.6
.37
.46
1.45
1:2.24
1:3.16
6.25:1
5.6:1
3.16:1
1:1.12
1:1.58
12.5:1
11.2:1
6.32:1
85.97
85.97
78.18
78.18
78.18
78175
78180
78185
78190
78195
500ct
500ct
*500ct
500ct
600ct
150ct
500ct
500ct
600ct
12.8ct
37.5
125
-
150
3.2
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
4.5
4.5
4.5
4.5
4.1
41.6
41.6
41.6
41.6
50
17.5
58.3
58.3
70
1.49
4.37
14.58
14.58
17.5
.37
1.83:1
1:1
1:1
1:1.1
6.85:1
3.65:1
2:1
-
1.83:1
13.7:1
78.18
85.97
85.97
85.97
85.97
78200
78205
78210
78215
78220
600ct
600ct
600ct
600ct
*600ct
30ct
48ct
200ct
600ct
600ct
7.5
12
50
150
-
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
4.1
4.1
4.1
4.1
4.1
50
50
50
50
50
3.5
5.6
23.3
70
70
.875
1.4
5.83
17.5
17.5
4.47:1
3.54:1
1.73:1
1:1
1:1
8.94:1
7.07:1
3.46:1
2:1
-
78.18
78.18
78.18
78.18
85.97
78225
78230
78235
78240
78245
600ct
640ct
700ct
800ct
800ct
1200ct
12.8ct
100ct
12.8ct
48ct
300
3.2
25
3.2
12
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
4.1
3.9
3.8
3.5
3.5
50
53.3
58.3
66.6
66.6
140
1.49
11.6
1.49
5.6
35
.37
2.91
.37
1.4
1:1.41
7.07:1
2.65:1
7.9:1
4.08:1
1.41:1
14.4:1
5.29:1
15.8:1
8.16:1
78.18
78.18
78.18
85.97
80.18
78250
78255
78260
78265
78270
800ct
900ct
1000ct
1000ct
1000ct
800ct
600ct
12ct
50ct
1000ct
200
150
3
12.5
250
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
3.5
3.3
3.2
3.2
3.2
66.6
75
83.3
83.3
83.3
93.3
70
1.4
5.83
116.6
23.3
17.5
.35
1.45
29.15
1:1
1.22:1
9.13:1
4.47:1
1:1
2:1
2.45:1
18.3:1
8.94:1
2:1
80.18
80.18
88.24
88.24
80.18
78275
78280
78285
78290
78295
1060ct
l200ct
1200ct
1200ct
*1200ct
12.8ct
12.8ct
500ct
1200ct
1200ct
3.2
3.2
125
300
-
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
3.1
2.9
2.9
2.9
2.9
88.3
100
100
100
100
1.49
1.49
58.3
140
140
.37
.37
14.58
35
35
9.1:1
9.68:1
1.55:1
1:1
1:1
18.2:1
19.4:1
3.1:1
2:1
-
88.24
88.24
88.24
88.24
88.24
78300
78305
78310
78315
78320
1500ct
1500ct
*1500ct
*1500ct
1600ct
12ct
500ct
600ct
1500ct
12.8ct
3
125
-
-
3.2
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
2.6
2.6
2.6
2.6
2.5
125
125
125
125
133.3
1.4
58.3
70
175
1.49
.35
14.58
17.5
43.75
.37
11.2:1
1.73:1
1.58:1
1:1
11.2:1
22.4:1
3.46:1
-
-
22.4:1
88.24
80.18
80.18
88.24
88.24
PICO
Part
Number
Primary
Impedence
Ohms
Secondary
Impedence
Ohms
Split
Windings
Power Watts
Primary
Unbal
DC
Current
ma
Primary
DC
Resistance
Ohms
Secondary
DC
Resistance
Ohms
Turns/Ratio
Prim/Sec

PICO
Prices
1-9**
(US $)

Ser
Par
1 Khz
and
Higher
300Hz
and
Higher
Ser
Conn
Par
Conn
SEC
Ser
Conn
SEC
Par
Conn
78325
78330
78335
78340
78345
2000ct
2000ct
*2000ct
2000ct
2000ct
8ct
2000ct
2000ct
8000ct
2500ct
2
500
-
2000
625
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
2.2
2.2
2.2
2.0
1.8
166.6
166.6
166.6
166.6
166.6
.93
233.3
233.3
933.3
291.6
.23
58.33
58.33
233.3
72.4
15.8:1
1:1
1:1
1:2
1:1
31.6:1
2:1
-
1:1
2:1
88.24
88.24
88.24
85.97
85.97
78350
78355
78360
78365
78370
3000ct
*3000ct
3600ct
4000ct
4000ct
3000ct
3000ct
3600ct
16ct
600ct
725
-
900
4
150
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
1.8
1.7
1.6
1.6
1.6
250
250
300
333.3
333.3
350
350
420
1.86
70
87.5
87.5
105
.46
17.5
1:1
1:1
1:1
15.8:1
2.58:1
2:1
-
2:1
31.6:1
5.16:1
85.97
85.97
85.97
85.97
85.97
78375
78380
78385
78390
78395
4000ct
*4000ct
5000ct
5000ct
7500ct
1000ct
8000ct
500ct
5000ct
50ct
250
-
125
1250
12.5
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
1.6
1.4
1.4
1.2
1.2
333.3
333.3
416.6
416.6
625
116.6
933.3
58.3
583.3
5.83
29.16
233.3
14.58
145.8
1.45
2:1
1:1.41
3.16:1
1:1
12.2:1
4:1
-
6.32:1
2:1
24.5:1
85.97
94.52
85.97
85.97
94.52
78400
78405
78410
78415
78420
7500ct
7500ct
7500ct
*7500ct
8000ct
100ct
600ct
2500ct
7500ct
12.8ct
25
150
625
-
3.2
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
1.2
1.2
1.2
1.1
1.1
625
625
625
625
666.6
11.66
70
291.6
875
1.49
2.91
17.5
72.9
218.75
.37
8.66:1
3.54:1
1.73:1
1:1
25:1
17.3:1
7.07:1
3.46:1
-
50:1
86.84
86.84
86.84
86.84
94.52
78425
78430
78435
78440
78445
8000ct
*8000ct
*9000ct
10,000ct
10,000ct
1000ct
1200ct
9000ct
12.8ct
16ct
250
-
-
3.2
4
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
1.1
1.1
1.0
1.0
1.0
666.6
666.6
750
833
833
116.6
140
1.050
1.49
1.86
29.16
35
262.5
.37
.46
2.83:1
2.58:1
1:1
28:1
25:1
5.66:1
-
-
56:1
50:1
94.52
94.52
94.52
94.52
86.84
78450
78455
78460
78465
78470
10,000ct
10,000ct
10,000ct
10,000ct
10,000ct
100ct
200ct
500ct
600ct
1000ct
25
50
125
150
250
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
1.0
1.0
1.0
1.0
1.0
833
833
833
833
833
11.66
23.3
58.3
70
116.6
2.91
5.83
14.58
17.5
29.16
10:1
7.07:1
4.47:1
4.08:1
3.16.1
20:1
14.14:1
8.94:1
8.16:1
6.32:1
86.84
86.84
86.84
86.84
86.84
78475
78480
78485
78490
78495
10,000ct
10,000ct
10,000ct
10,000ct
10,000ct
1200ct
1500ct
2000ct
5000ct
7500ct
300
375
500
1250
1875
.4
.4
.4
.4
.4
.050
.050
.050
.050
.050
1.0
1.0
1.0
1.0
1.0
833
833
833
833
833
140
175
233.33
583.3
875
35
43.75
58.33
145.83
218.75
2.89:1
2.58:1
2.24:1
1.41:1
1.15:1
5.77:1
5.16:1
4.47:1
2.83:1
2.3:1
86.84
88.24
88.24
88.24
88.24
78500
78505
10,000ct
*10,000ct
10,000ct
10,000ct
2500
-
.4
.4
.050
.050
1.0
1.0
833
833
1166.6
1166.6
291.6
291.6
1:1
1:1
2:1
-
80.18
94.52

*Includes Electrstatic Shield
 
 

**Discount Prices: 
  • 1-9 Net;
    10-24 less 10%;
    25-49 less 16%; 
    50-99 less 23%;
    100-499 less 30% 
Ordering Instructions: 
  • No minimum. 
    Net 30 days F.O.B. Pelham, NY

    Delivery--stock to one week for sample orders.

FEATURES
  • Extreme resistance to thermal shock 
  • Ultra miniature size 
  • PICO is approved QPL Source (MIL-PRF-27) 
  • Magnetic Shield Design available 
  • Electrostatic shielding can be added 
  • Variation of standard designs available 
  • Every unit 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 

 

RECOMMENDED LAND PATTERN DESIGN

For immediate engineering assistance or to place an order:
Call Toll Free: 800-431-1064

PICO Electronics, Inc.

143 Sparks Ave. Pelham, NY 10803-1810
Tel: 914-738-1400 or Fax: 914-738-8225

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