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HIGH FREQUENCY MAGNETICS  
T1/CEPT Dual Line Interface Transformers  
TM9908  
•
Minimum interwinding breakdown voltage of 1500 Vrms  
ELECTRICAL SPECIFICATIONS at 25° C  
Primary  
Inductance  
mH min  
Leakage  
Inductance  
µH max  
Interwinding  
Capacitance  
pF max  
DCR  
Ω
max  
Turns Ratio  
±5%  
Part Number  
Pri  
Sec  
Coil A  
Coil B  
Coil A  
Coil B  
Coil A  
Coil B  
Coil A  
Coil B  
Coil A Coil B Coil A Coil B  
0553-0013-1J  
0553-0013-2J  
0553-0013-4J  
0553-1167-00  
0559-5999-04  
0559-5999-05  
1 : 2 CT  
1 : 2 CT  
1 : 2 CT  
1 : 1.36  
1 : 1  
1.2  
1.2  
1.2  
1.2  
1.2  
1.2  
1.2  
1.2  
1.2  
1.2  
1.5  
1.5  
0.80  
0.80  
0.80  
0.50  
0.50  
0.40  
0.80  
0.80  
0.50  
0.60  
0.60  
0.50  
35  
35  
0.8  
0.8  
0.8  
0.8  
0.7  
0.7  
1.8  
1.8  
1.8  
0.8  
1.1  
1.1  
0.8  
0.8  
0.8  
0.8  
0.8  
0.8  
1.8  
0.8  
0.8  
1.8  
1.8  
1.8  
35  
35  
35  
35  
35  
35  
35  
40  
40  
40  
1CT : 2 CT  
1: 1 / 1: 1.26  
1 : 1.15 CT  
1 : 1 / 1 : 1.26  
1 : 2 CT  
1 : 2 CT  
1 : 2 CT  
SCHEMATICS  
0553-0013-1J  
0559-5999-04  
0553-1167-00*  
0559-5999-05*  
0553-0013-2J  
0553-0013-4J  
Secondary  
1
Primary  
14  
Secondary  
1
Primary  
Primary  
Secondary  
14  
1
2
3
5
14  
Coil A 2  
2
3
5
13  
12  
10  
3
5
12  
10  
9
12  
10  
Coil B  
8
8
8
7
7
7
Primary  
Secondary  
Primary  
Secondary  
Secondary  
Primary  
* (-00 & -05) 1 : 1  
(12 - 14) : (2 - 3)  
1 : 1.26 (12 - 14) : (1 - 3)  
©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  
T114  
HIGH FREQUENCY MAGNETICS  
T1/CEPT Dual Line Interface Transformers  
TM9908  
MECHANICAL  
0553-0013-1J  
0553-0013-2J  
0553-0013-4J  
0553-1167-00*  
0559-5999-04  
0559-5999-05  
0.800  
[20.32]  
max  
0.385  
[9.78]  
max  
0.250  
[6.35]  
max  
0.020 [0.51] diameter  
0.120  
[3.05]  
solderable leads  
0.300  
[7.62]  
0.200  
[5.08]  
0.600  
[15.24]  
Dimensions are in inches [millimeters].  
Standard dimension tolerance is  
±0.020 [0.51] unless otherwise noted.  
©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99  
CORPORATE  
FAR EAST  
EUROPE  
Bel Fuse Inc.  
Bel Fuse Ltd.  
Bel Fuse Europe Ltd.  
198 Van Vorst Street  
Jersey City, NJ 07302  
Tel 201-432-0463  
Fax 201-432-9542  
www.belfuse.com  
8F / 8 Luk Hop Street  
San Po Kong  
Kowloon, Hong Kong  
Tel 852-2328-5515  
Fax 852-2352-3706  
www.belfuse.com  
PrestonTechnology Management Centre  
Marsh Lane, Suite F23, Preston  
Lancashire, PR1 8UD, U.K.  
Tel 44-1772-556601  
Fax 44-1772-888366  
www.belfuse.com  
T115