Transformers for T1 / CEPT / PCM Applications
Available in both Thru-hole & SMD EP7 Packages
Schematic "A"
PRI.
1
2
3
Schematic "B"
6
5
4
2
SEC.
1
2
3
O
Schematic "C"
PRI.
SEC.
1
Schematic "D"
PRI.
SEC.
1
2
6
6
6
5
4
75
Ω
5
100
Ω
3
120
Ω
4
3
4
Electrical Specifications at 25 C
Part
Impedance
Number
(
Ω
)
(Hi-Pot)
Insertion Loss
max. @ 772 kHz
( dB )
Frequency
Response
( dB )
+
0.10
100 kHz to 1.544 MHz
Return Loss
min.
( dB )
Longitudinal
Balance min.
( dB )
Primary Secondary
DCR max. DCR max.
(
Ω
)
(
Ω
)
Style &
Schem.
T-13800
( 1200 V
RMS
)
100 / 100
100 / 100 / 100
75-100-120 / 75
0.2
@ 772 kHz
25
*
15
**
20
***
35
@ 1.544 MHz
1.0
0.6
1.55
1.0
0.6
1.15
EP7 - A
EP7 - B
EP7 - C
T-13801
( 1500 VDC)
0.075
@ 772 kHz
+
0.25
100 kHz to 1.544 ** MHz
+
0.15
100 kHz to 1.544 MHz
35
@ 1.544 MHz
T-13802
(1650 VDC)
*
**
***
0.25
@ 772 kHz
40
@ 1.0 MHz
100 kHz to 1.544 MHz 100
Ω
100 kHz to 4.0 MHz 100
Ω
50 kHz to 3.0 MHz 75
Ω
Secondary 75
Ω,
100
Ω
or 120
Ω
Primary
OCL
min.
( mH )
PRI-SEC
C
W/W
max.
( pF )
Surface Mount Versions of all Parts listed are available.
Add suffix "G" to specify surface mount package style.
Leakage
Ind. max.
(
µH
)
Primary
DCR max.
(
Ω
)
Secondary
DCR max.
(
Ω
)
Electrical Specifications
1,2,3
at 25
O
C
Turns
Part
Ratio
Number
(
+
5%)
Style &
Schem.
Primary
Pins
T-13803
T-13804
T-13805
1CT : 1
1CT : 0.86
2CT : 1
1.2
1.5
1.2
35
35
50
1.0
1.0
1.0
0.9
0.65
1.1
.370
(9.40)
MAX.
0.9
1.4
0.7
EP7 - D
EP7 - D
EP7 - D
.375
(9.53)
MAX.
1-3
1-3
1-3
1. 1000 V
RMS
minimum Isolation.
2. ET-Product of 10 V-msec min.
3. OCL Measured at Primary @100KHz & 20mV
.465
(11.81)
MAX.
.394
(10.00)
MAX.
.375
(9.53)
MAX.
"G"
SMD
Package
.375
(9.53)
MAX.
.340
(8.64)
.505 (12.83)
.490 (12.45)
.525
(13.34)
.025
(0.64)
.098
.028
(2.50) (0.70)
.098 .024
(2.49) (0.61)
1
2
3
.110
(2.79)
MIN.
.039
(0.99)
.080
(2.03)
Part Number Examples:
T-13800
T-13800G
T-13803
T-13803G
(EP7
(EP7
(EP7
(EP7
Thru-hole)
SMD)
Thru-hole)
SMD)
1
2
3
6
Suggested
Pad Layout
.100
(2.54)
TYP.
.050
(1.27)
TYP.
5
4
Bottom
View
6
5
4
.075
(1.905)
TYP.
For other values & Custom Designs, contact factory.
T1-BOBIN - 4/99
Specifications subject to change without notice.
Rhombus
Industries Inc.
10
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960
•
Fax: (714) 896-0971