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- Using Ferrite EP cores these transformers are capable of
handling 2.5mA to 5mA DC unbalanced. They are good for
coupling and for RF telecommunication equipment.
Part
Number
ELECTRICAL SPECIFICATION AT 25°C
ELECTRICAL SPECIFICATION AT 25°C
EP13-0191
EP13-0192
EP17-0181
EP17-0182
EP20-0171
EP20-0172
EP20-0173
EP20-0174
600
900
600
900
600
600/SPLIT
600
900/SPLIT
Pri
Z
(
Ω )
600
900
600
900
600
600
900
600
Sec
Z
(
Ω )
Max
Unbalance
( DC mA )
NA
NA
2.5
2.5
5
5
5
4
Lp min @
1 KHz 1 V
( mH )
Insertion
Loss @
1 KHz
( db )
Max
Size
Break-down
voltage ( VRMS )
Pri to Sec
Return
loss ( db )
ERL min
Longitudinal
balance min
( db )
750
1000
750
1000
750
750
750
1250
1.0
1.0
1.0
1.0
0.8
0.8
0.8
0.8
±0.25
±0.25
±0.25
±0.25
±0.25
±0.25
±0.25
±0.25
60
60
60
60
60
60
60
60
26
26
22
22
26
26
26
26
1000 Volts
1000 Volts
1000 Volts
1000 Volts
1500 Volts
1500 Volts
1500 Volts
1500 Volts
1
1
2
2
3
3
3
3
O
O
O
O
O
1
2
3
4
5
6
7
A
Size
Width
Max
A
Lead
spacing
nominal
F
1
2
3
13.85
20.10
22.10
Lead
length
nominal
E
Spacing
between
2 windings
nominal
D
Height
Max
C
Length
Max
B
13.85
20.10
25.50
10.16
15.24
17.78 ±0.13
4.7
5.0
6.35
NOTE
NOTE
EP 13 & 17 are also available with 8 terminal bobbins, instead of 10 as per drawing.
In this case, primary will be pins 1 and 4, and secondary will be pins 5 and 8.
DIMENSIONS IN MILLIMETERS
DIMENSIONS IN MILLIMETERS
D
13.20
15.50
20.35
2.54
5.08
5.08
NOTE:
NOTE: In the configuration of split primary, pins 1 and 4 for primary 1, and pins 2 and 5 for primary 2.
SCHEMATIC
SCHEMATIC
2
9
7
4
1
4
5
8
FOR EP20
1
4
2
5
7
9
SPLIT PRIMARY
B
FOR EP13 & 17
89
BOTTOM VIEW
C
COUPLING TRANSFORMER
COUPLING TRANSFORMER
SERIES EP
SERIES EP
O
O
O
O
O
F
Frequency
Response
( db )
300 Hz to 3500 Hz
9
10
8
E
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