ADSL MAGNETICS
Through Hole Transformers
TM9957
•
•
2718AF2 and 2718AH2 operate over the frequency
range from 1kHz to 1.1MHz
•
•
•
Designed for broadband applications
Minimum interwinding breakdown voltage of 1500 Vrms
Qualified per Bellcore TR-TSY-000357-1
2718BK2 operates over the frequency range from
500Hz to 1.1MHz
ELECTRICAL SPECIFICATIONS at 25° C
DCR
Ω
max
Frequency
Response
Turns Ratio
± 3%
Primary
Inductance
mH min
Interwinding
Capacitance
pF max
dB
Insertion Loss
dB typ
Part Number
Pri : Sec
1.0 : 1.0
1.0 : 1.0
1.0 : 1.0
Pri
Sec
2.30
2.30
1.50
1kHz
0.50
0.50
N/A
1MHz
0.50
0.50
N/A
2718AF2
2718AH2
25.5
25.5
11.0
2.80
2.80
1.50
0.20
0.20
N/A
7.0*
10.0
30
2718BK2
* Terminal 8 grounded
SCHEMATICS
2718AF2
2718BK2
2718AH2
S
1
4
1
10
4
1
10
2
7
5
10
2
7
5
3
2
8
9
9
6
4
7
9
6
8
Primary
Secondary
Primary
Secondary
Primary
Secondary
‘S’ denotes an
electrostatic shield.
©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T514
