Transformer Selection Guide  

 

Customers of Cologne Chip can choose from a variety of transformers.

For ISDN S/T Basic Rate Interface, all ISDN S/T transformers are compatible to the HFC-S and XHFC series of Cologne Chip that fulfill two criteria:

1) Turns ratio of 1:2 (line side : chip side)
2) Center tap on chip side (required for Cologne Chip receiver circuitry)
For two-wire ISDN Up Basic Rate interface (Up0/UpN), all Up transformers are compatible to the XHFC series of Cologne Chip that have the following features:
1) Turns ratio of 1:1
2) Two separated windings (resp. a centre tap) on chip side (required for Cologne Chip receiver circuitry)
For ISDN E1 Primary Rate Interface, all E1 transformers are compatible to the HFC-E1 that fulfill two criteria:
1) Turns ratio of 2.4:1 (line side : chip side) for transmit and 1:1 for receive path.
2) Center tap on chip side (required for Cologne Chip receiver circuitry)
Several companies provide transformers and transformer modules that can be used with our ISDN Basic Rate and Primary Rate Interface controllers. Most popular are SMD modules with chokes for EMI reasons. Part numbers and manufacturers are listed underneath. The "bestsellers" in terms of price-performance of some manufacturers are marked with an asterisk (*).

This cross-reference list has not been compiled under aspects of RoHS compliance. For the current RoHS status of the listed parts, please contact the transformer manufacturers straight.

Please note: Cologne Chip cannot take any liability concerning the product names, characteristics and availability. All information presented is based upon manufacturer's statement. Products can change without notice. Please refer to the manufacturer in case of doubt.
 

Acuwa Halo Talema
Bel Fuse Magtek UMEC
Corelogic Pulse VAC
Frecom Sumida (Vogt) YCL  

 

  Acuwa  
 
 
Acuwa Technology Inc.
 
European Office
Arnim von Brocke
Birkenweg 40
22880 Wedel
Germany
Phone: +49-4103-932020
Fax: +49-4103-932021

Internet: www.acuwa.com

 

S/T Interface

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  APL-045 (SMD, miniature)   * APL-045B (SMD, miniature)
  APL-045C (SMD, miniature)   * AS-112 (SMD)

 

  Bel Fuse  
 
 
Bel Fuse Inc.
 
Unit 28 Turkey Court
Turkey Mill
Ashford Road
Maidstone, Kent ME14 5PP
United Kingdom
Phone: +44-1622-757395

Internet: www.belfuse.com

 

E1 Interface

Dual Transformer Module    
  S553-6500-A5-F (SMD)        
  S553-6500-A6-F (SMD)        

 

  Corelogic  
 
 
Corelogic Communication Co., Ltd.
 
P.O. Box 4351, F-5, Huayuelong Commercial Mansion
#3 Jingyuan Road
Shijingshan District
Beijing 100043
P.R. China
Phone: +86-10-68665346
Fax: +86-10-68659631

Internet: www.corelogic.com.cn

 

S/T Interface

Single Transformer          
  CL1011 (SMD)        
  CLBSN A2H(S) (THT)        
  CLBSN C2H(S) (THT)        
  CLBSN S2H(S) (THT)        

 

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  CLBSN A4C(S) (SMD)     CLBST W2Y1 (SMD)
  CLBSN C4C(S) (SMD)     CLBSN A4E(S) (SMD)
  CLBSN M4C(S) (SMD)     CLBSN C4E(S) (SMD)
  CLBSN S4C(S) (SMD)     CLBSN M4E(S) (SMD)
          CLBSN S4E(S) (SMD)

 

E1 Interface

Dual Transformer Module    
  CL1292 Z3 (THT)        

 

  Frecom  
 
 
Frecom Industrial Co.
 
2/F Jinda Bld, No. 8 Kefeng Rd.
Science & Technology Industrial Park
Nanshan Shenzhen
P.R. China
Phone: +86-755-661-059-4
Fax: +86-755-663-163-4

Internet: www.frecom.com.cn

 

S/T Interface

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  S-11008 (THT)     S-10002 (THT)
  S-11305 (SMD)     S-10002A (THT)

 

  Halo  
 
 
Halo Electronics, Inc.
 
1861 Landings Drive
Mountain View
CA 94043
United States
Phone: +1-650-903-3800
Fax: +1-650-903-9300

Internet: www.haloelectronics.com

 

E1 Interface

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  TG91-1505N1 (SMD)     TGSP-S225NZ (SMD)
  TG91-1505NZ (SMD)        

 

  Magtek  
 
 
Magtek Technology Inc.
 
8F-7.No.110, Sec 3, Chung-Shan Rd
Chung-Ho City
Taipei Hsien
Taiwan
Phone:+886-2-8227-6477
Fax:+886-2-8227-6476

Internet: www.mag-tek.com.tw

 

E1 Interface

Dual Transformer Module          
  MT8548 (SMD)        

 

  Pulse Engineering  
 
 
Pulse Engineering, Inc.
 
12220 World Trade Drive
San Diego
CA 92128
United States
Phone: +1-858-674-8100
Fax: +1-858-674-8262

Internet: www.pulseeng.com

 

S/T Interface

Single Transformer          
  T5003 (SMD, for PCMCIA)        
  T5020 (SMD)        
  T5023 (SMD)        
  T5024 (SMD, 3 kV)        
  T5033 (SMD)        
  T5035 (THT, 3 kV)        
  T5036 (SMD, 3 kV)        
* PE-64995 (THT)        
  PE-64999 (THT)        
  PE-68992 (THT)        
  ST-5069 (SMD)        

 

Dual Transformer Module without chokes         Dual Transformer Module with chokes
* T5006 (SMD)     T5012 (THT)
  T5007 (SMD)     T5034 (SMD)
  T5042 (SMD, 3 kV)     T5038 (SMD)
  PE-65495 (THT)        
  PE-65499 (THT)        
  PE-65795 (SMD)        
  PE-65799 (SMD)        

 

E1 Interface

Dual Transformer Module without chokes   Dual Transformer Module with chokes
  T1308 (SMD, 3 kV)   * T1219 (SMD)
  TX1321 (SMD)     T1176 (SMD)

 

  Sumida (formerly known as Vogt)  
 
 
Sumida AG
 
Dr. Hans-Vogt-Platz 1
D-94130 Obernzell
Germany
Phone: +49-8591-937-0
Fax: +49-8591-937-209

Internet: www.sumida-eu.com

 

S/T Interface

Single Transformer          
  503 05 901 00 (SMD)        
* 503 10 009 00 (SMD)        
  503 12 001 00 (SMD, for PCMCIA)        
  503 20 010 00 (SMD)        
  503 20 019 00 (SMD, 4 kV)        
* 543 80 008 00 (THT, 4 kV)        

 

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  503 16 504 00 (SMD)   * 503 16 017 00 (SMD, miniature)
  503 16 513 00 (SMD, 4 kV)     503 16 501 00 (SMD)
  503 20 981 00 (SMD)     503 16 502 00 (SMD)
  503 74 003 00 (SMD, 4 kV)   * 503 16 505 00 (SMD)
  503 74 006 00 (SMD)     503 16 506 00 (SMD)
          503 20 985 00 (SMD)
          543 76 006 00 (THT)

 

Up Interface (Up0/UpN)

Single Transformer    
  503 10 903 00 (SMD)        

 

E1 Interface

Dual Transformer Module    
  503 16 007 00 (SMD)        

 

  Talema  
 
 
Talema Elektronik GmbH
 
Sembdnerstr.5
P.O.Box 2523
D-82110 Germering
Germany
Phone: +49-89-84100-0
Fax: +49-89-84100-25

Internet: www.talema.net

 

S/T Interface

Single Transformer          
  ISF-140B1 (THT)        
  ISJ-140B (SMD)        
  ISV-140B1 (THT)        
* ISHF-240B1 (THT, 3 kV)        
  SHJ-240B (SMD, 3 kV)        
  SMJ-140B (SMD)        
  SWJ-140B (SMD)        

 

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  MUJ-103A-000 (SMD, miniature)     HVM-140C1 (THT)
          ISM-140C1 (THT)
        * MAJ-403A (SMD)
          MSJ-403A (SMD)
        * MUJ-103A-500 (SMD, miniature)
          MUJ-103A-101 (SMD, miniature)
          MUJ-103A-501 (SMD, miniature)
          MUJ-103A-502 (SMD, miniature)
        * MHJ-240B1 (SMD, 3 kV)

 

E1 Interface

Dual Transformer Module    
  MJM-022 (SMD)        

 

  UMEC  
 
 
UMEC GmbH
 
Kreuzenstr. 80
D-74076 Heilbronn
Germany
Phone: +49 7131-7617-0
Fax: +49 7131-7617-20

Internet: www.umec.de

 

S/T Interface

Single Transformer          
  UT 20995 (THT)        
  UT 20999 (THT)        
  UT 21023 (THT)        
  UT 21595 (THT)        
  UT 28166 (THT)        
  UT 28166-TS (SMD)        
* UT 28428-TS (SMD)        
* UT 28729 (THT, 4 kV)        

 

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  UT 20465-00 TS (SMD, 3 kV)     UT 20465-05 TS (SMD, 3 kV)
* UT 20495 (THT)     UT 20465-10 TS (SMD, 3 kV)
  UT 20495-TS (SMD)     UT 20465-50 TS (SMD, 3 kV)
  UT 20499 (THT)     UT 20465-5M TS (SMD, 3 kV)
  UT 20499-TS (SMD)     UT 20495CV TS (SMD)
  UT 20765-00 TS (SMD, 3 kV)     UT 20765-05 TS (SMD, 3 kV)
  UT 20775-00 TS (SMD)     UT 20765-10 TS (SMD, 3 kV)
* UT 20795-00 TS (SMD)     UT 20765-50 TS (SMD, 3 kV)
  UT 21646S (SMD, miniature)     UT 20775-05 TS (SMD)
          UT 20775-10 TS (SMD)
          UT 20775-50 TS (SMD)
          UT 20775-5M TS (SMD)
        * UT 20795-05 TS (SMD)
          UT 20795-10 TS (SMD)
          UT 20795-50 TS (SMD)
          UT 20795-5M TS (SMD)
          UT 21624 (THT)
          UT 21624-TS (SMD)
        * UT 21644S (SMD, miniature)
          UT 21651S (SMD, miniature)
        * UT 21657S (SMD, miniature)
          UT 28624 (THT)
          UT 28624A (THT)
          UT 28624A-T (SMD)

 

Up Interface (Up0/UpN)

Single Transformer    
  UT 21434A-TS (SMD)        

 

E1 Interface

Dual Transformer Module    
  UT 23014 (SMD)        

 

  VAC  
 
 
Vacuumschmelze GmbH & Co. KG
 
Gruener Weg 37
D-63450 Hanau
Germany
Phone: +49-6181-38-0
Fax: +49-6181-38-2645

Internet: www.vacuumschmelze.com

 

S/T Interface

Single Transformer          
  3-L4021-X066 (THT)        
  3-L4025-X095 (THT)        
  3-L4031-X001 (THT)        
  3-L4031-X029 (THT)        
* 3-L4097-X029 (THT, 3 kV)        
* 3-L5024-X028 (SMD)        
  3-L5032-X040 (SMD, 3 kV)        

 

Dual Transformer Module without chokes         Dual Transformer Module with chokes
  7-M4035-X001 (THT)     7-L5026-X010 (SMD)
  7-M5014-X001 (SMD, miniature)     7-L5026-X011 (SMD, 3 kV)
  7-M5026-X001 (SMD)     7-L5026-X017 (SMD)
  7-M5026-X002 (SMD, 3 kV)     7-L5051-X014 (THT)
  7-M5054-X001 (SMD)     7-L5054-X005 (SMD, 3 kV)
        * 7-L5054-X006 (SMD, 3 kV)

 

Up Interface (Up0/UpN)

Single Transformer    
  3-M5024-X008 (SMD)        

 

E1 Interface

Dual Transformer Module    
* 7-M5014-X011 (SMD)        
  7-M5026-X022 (SMD)        

 

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The ISDN Chip Company!
Last Modified: 10/09/2014