Self-Shielded
Audio Transformers
Using EP Geometry cores,
these transformers provide
excellent shielding.
Isolation is 1500 Vrms minimum
Longitudinal Balance is 60dB min.
Frequency range: 300Hz to 3400Hz
Electrical Specifications at 25
O
C
Thru-hole
EP7 Style
Part Number
T-30400
Impedance
(Ohms)
600 / 600
UNBAL. Insertion Frequency
Response
DC
Loss
(1)
(dB)
(mA)
(dB)
0.0
0.7
0.50
Return
Loss
(dB)
(2)
18
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
31
39
Electrical Specifications at 25
O
C
Thru-hole
EP10 Style
Part Number
T-30401
Impedance
(Ohms)
600 / 600
UNBAL. Insertion Frequency
Response
DC
Loss
(1)
(dB)
(mA)
(dB)
0.0
0.9
0.50
Return
Loss
(dB)
(2)
21
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
34
43
Electrical Specifications at 25
O
C
Thru-hole
EP13 Style
Part Number
.465
(11.81)
MAX.
.375
(9.53)
MAX.
Impedance
(Ohms)
600 / 600
900 / 900
UNBAL. Insertion Frequency
Response
DC
Loss
(dB)
(mA)
(dB)
(1)
0.0
0.0
1.0
1.0
0.25
0.25
Return
Loss
(dB)
(2)
26
26
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
36
44
47
58
T-30402
T-30403
EP7 Style
Thru-hole
.394
(10.00)
MAX.
1. Insertion Loss measured at 1 kHz.
2. Return Loss measured at 300 Hz.
.110
(2.79)
MIN.
.080
(2.03)
T-30400
Schematic
1
4
1
T-30401
Schematic
5
2
T-30402 & 30403
Schematic
7
.098
.024
(2.49) (0.61)
6
5
4
PRI
.039
(0.99)
SEC.
6
PRI
SEC.
8
PRI
SEC.
3
4
4
9
Bottom
View
1
2
3
Dimensions in Inches (mm)
.480
(12.19)
MAX.
.450
(11.43)
MAX.
.550
(13.97)
MAX.
EP13 Style
Thru-hole
.536
(13.61)
MAX.
EP10 Style
Thru-hole
.460
(11.68)
MAX.
.525
(13.34)
MAX.
.210
(5.33)
TYP.
.100
(2.54)
TYP.
.300
(7.62)
TYP.
Pin Diameter is 0.025 (0.64)
10
9
8
.210
(5.33)
TYP.
.100
(2.54)
TYP.
7
6
.400
(10.16)
TYP.
Pin Diameter is 0.025 (0.64)
8
7
6
5
Bottom
View
Bottom
View
4
1
2
3
4
5
1
2
3
Specifications subject to change without notice.
For other values & Custom Designs, contact factory.
EP - 10/98
Rhombus
Industries Inc.
15
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960
•
Fax: (714) 896-0971
Self-Shielded
Audio Transformers
Using EP Geometry cores,
these transformers provide
excellent shielding.
Isolation is 1500 Vrms minimum
Longitudinal Balance is 60dB min.
Frequency range: 300Hz to 3400Hz
Electrical Specifications at 25
O
C
Surface Mount
Impedance
EP7 Style
(Ohms)
Part Number
T-30400G
600 / 600
UNBAL. Insertion Frequency
Response
DC
Loss
(dB)
(mA)
(dB)
(1)
0.0
0.7
0.50
Return
Loss
(dB)
(2)
18
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
31
39
Electrical Specifications at 25
O
C
Surface Mount
Impedance
EP10 Style
(Ohms)
Part Number
T-30401G
600 / 600
UNBAL. Insertion Frequency
Response
DC
Loss
(dB)
(mA)
(dB)
(1)
0.0
0.9
0.50
Return
Loss
(dB)
(2)
21
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
34
43
Electrical Specifications at 25
O
C
Surface Mount
Impedance
EP13 Style
(Ohms)
Part Number
T-30402G
T-30403G
Dimensions
in Inches (mm)
.370
(9.40)
MAX.
.375
(9.53)
MAX.
.375
(9.53)
MAX.
.025
(0.64)
.34
(8.6)
.098
(2.50)
.028
(0.70)
.505 (12.83)
.490 (12.45)
UNBAL. Insertion Frequency
Response
DC
Loss
(1)
(dB)
(mA)
(dB)
0.0
0.0
1.0
1.0
0.25
0.25
Return
Loss
(dB)
(2)
26
26
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
36
44
47
58
600 / 600
900 / 900
1. Insertion Loss measured at 1 kHz.
2. Return Loss measured at 300 Hz.
T-30400G
Schematic
1
4
1
T-30401G
Schematic
5
2
T-30402 & 30403G
Schematic
7
EP7 Style
Surface Mount
PRI
SEC.
PRI
SEC.
PRI
SEC.
3
6
4
8
4
9
.432
(10.97)
MAX.
.492
(12.5)
.465 MAX.
(11.8)
MAX.
.522
(13.26)
MAX.
.532
(13.51)
MAX.
.516
(13.1)
MAX.
.469
(11.9)
MAX.
.413
(10.5)
.575 (14.6)
.567 (14.4)
EP10 Style
Surface Mount
EP13 Style
Surface Mount
.025
(0.64)
.098
(2.50)
.028
(0.70)
.100
(2.54)
.028
(0.70)
.025
(0.64)
.516
(13.1)
.675 (17.15)
.663 (16.85)
.525
(13.34)
6
5
4
.594
(15.10)
1
2
3
.715
(18.15)
1
2
3
4
EP7 SM
Suggested
Pad Layout
.100
(2.54)
TYP.
.050
(1.27)
TYP.
8
7
6
5
EP10 SM
.100
(2.54)
TYP.
10
9
8
EP13 SM
1
2
3
4
5
Suggested
Pad Layout
.100
(2.54)
TYP.
Suggested
Pad Layout
.050
(1.27)
TYP.
7
6
.075
(1.905)
TYP.
.050
(1.27)
TYP.
.100
(2.54)
TYP.
For other values & Custom Designs, contact factory.
.100
(2.54)
TYP.
EP - 10/98
Specifications subject to change without notice.
Rhombus
Industries Inc.
16
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960
•
Fax: (714) 896-0971
Self-Shielded Audio Transformers
Built with Ferrite EP Geometry cores, these
transformers provide excellent shielding.
Isolation is 1500 Vrms minimum
Longitudinal Balance is 60dB minimum
Frequency range: 300Hz to 3400Hz
Custom Designs Available
Electrical Specifications at 25
O
C
Thru-hole
EP17 Style
Part Number
T-30404
T-30405
Impedance
(Ohms)
600 / 600
900 / 900
UNBAL. Insertion Frequency
Response
DC
Loss
(1)
(dB)
(mA)
(dB)
2.5
2.5
1.0
1.0
0.25
0.25
Return
Loss
(dB)
(2)
26
26
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
45
55
58
71
4
T-30404 & 30405
Schematic
1
5
2
T-30406 & 30408
Schematic
7
1
4
2
8
4
9
5
T-30407 & 30409
Schematic
PRI
SEC.
PRI
SEC.
7
PRI
SEC.
9
Electrical Specifications at 25
O
C
Thru-hole
EP20 Style
Part Number
T-30406
T-30407
T-30408
T-30409
Impedance
(Ohms)
600 / 600
600CT / 600
600 / 900
900CT / 600
UNBAL. Insertion Frequency
Response
DC
Loss
(1)
(dB)
(mA)
(dB)
5.0
5.0
5.0
5.0
0.8
0.8
0.8
0.8
0.25
0.25
0.25
0.25
Return
Loss
(dB)
(2)
26
26
26
26
Pri.
Sec.
DCR max. DCR max.
(Ω )
(Ω )
27
27
27
33
36
36
44
36
1. Insertion Loss measured at 1 kHz.
2. Return Loss measured at 300 Hz.
Dimensions in Inches (mm)
.740
(18.80)
MAX.
.630
(16.00)
MAX.
.680
(17.27)
MAX.
.975
(24.77)
MAX.
.860
(21.84)
MAX.
EP17 Style
Thru-hole
EP20 Style
Thru-hole
.700
(17.78)
MAX.
.200
(5.08)
TYP.
.200
(5.08)
TYP.
.600
(15.24)
TYP.
Pin Diameter
is 0.025 (0.64)
10
.200
(5.08)
TYP.
.200
(5.08)
TYP.
9
8
7
6
Pin Diameter
is 0.025 (0.64)
.700
(17.78)
TYP.
8
7
6
5
Bottom
View
1
2
3
4
Bottom
View
1
2
3
4
5
Specifications subject to change without notice.
For other values & Custom Designs, contact factory.
EP - 10/98
Rhombus
Industries Inc.
17
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960
•
Fax: (714) 896-0971
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