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
(dB)
(mA)
(dB)
(1)
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
(dB)
(mA)
(dB)
(1)
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
RHOMBUS-IND [ Rhombus Industries Inc. ]
