SMD12 Dual Port T1/CEPT/ISDN-PRI Interface Transformer with 1500Vrms Isolation
55TB/57TB Series
2-Port T1/CEPT/ISDN-PRI Magnetic Transformer | 1.5KV Isolated | 12-Pin SMD Surface Mount For industrial control and telecom equipment
SMD dual telecom transformer has 1.5KVrms Isolation and T1/CEPT Interface. 55TB & 57TB series have dual SMT package contains both transmit and receive transformers. The models matched to Leading tansceiver Ics. Both series have been recognized by UL 1950.
Designed for modern computer equipment and industrial control systems, our surface mount telecom transformer series provides exceptional stability for networking devices. As a professional telecom magnetics manufacturer, we deliver High reliability SMD telecom transformer solutions, including dual port telecom transformer and SMD ISDN transformer configurations. These units function as a precise network interface transformer or telecom line isolation transformer, supporting T1 interface transformer, CEPT interface transformer, and ISDN PRI interface transformer requirements. Integrate our telecom line transformer and telecom isolation transformer to ensure superior signal integrity in any telecommunications environment.
Yuan Dean can provide high efficiency production solutions and customized products.
Any OEM/ ODM requirement is welcome. We look forward to cooperating with you!
Features
- Models matched to Leading tansceiver Ics.
- Provide 1500vrms isolation.
- Recognized by UL 1950.
Applications
- computer equipment.
- Internet equipment.
- industrial control.
- telecom equipment.
Test Conditions
- Inductance------------------10KHz/20mV.
- Leakage Inductance -------100KHz/200mV.
- Interwinding Capacitance -100KHz/200mV.
Electrical Specifications@25°C
| Part Number | Turns Ratio (± 5%) |
OCL @25°C (mH min.) |
LL (uH max.) |
CW/W (pf max.) |
DCR Pri. (Ω max.) |
DCR Sec. (Ω max.) |
Primary Pins |
|---|---|---|---|---|---|---|---|
| EXTENDED TEMPERATURE RANGE MODELS-OPERATING TEMPERATURE 0℃TO+70℃ | |||||||
| 55TB-1221BNL | 1CT:2CT&1CT:2CT | 1.20&1.20 | 0.80&0.80 | 50&50 | 1.00&1.00 | 1.70&1.70 | 12-10,4-6 |
| 55TB-1621ANL | 1CT:2CT&1:1.36CT | 1.60&1.60 | 1.00&0.80 | 60&55 | 1.70&1.0 | 2.00&1.70 | 12-10,4-6 |
| 55TB-1261DNL | 1:1.15CT&1CT:2CT | 1.60&1.60 | 0.80&0.80 | 60&50 | 1.00&1.00 | 1.00&2.00 | 12-10,4-6 |
| 55TB-1221ENL | 1:1/1.26&1:2 CT | 1.20&1.20 | 0.80&0.80 | 50&60 | 1.00&1.00 | 1.10&1.70 | 12-10,4-6 |
| 55TB-1621FNL | 1:2 CT &2:1 | 1.60&1.60 | 1.30&1.30 | 55&40 | 1.10&1.10 | 1.10*0.70 | 1-3,4-6 |
| 55TB-1222BNL | 1CT:1CT &1CT:1CT | 1.20&1.20 | 0.80&0.80 | 50&50 | 1.00&1.00 | 1.00&1.00 | 1-3,4-6 |
| 55TB-1223BNL | 1CT:1.15CT &1CT:1.15CT | 1.20&1.20 | 0.80&0.80 | 50&50 | 1.20&1.20 | 1.40&1.40 | 1-3,4-6 |
| 55TB-1224BNL | 1CT:1CT &1CT:2CT | 1.20&1.20 | 0.80&0.80 | 50&50 | 1.00&1.00 | 1.00&1.80 | 1-3,4-6 |
| 55TB-1625BNL | 1CT:1.15CT &1CT:1CT | 1.60&1.60 | 0.80&0.80 | 60&60 | 1.20&1.20 | 1.40&1.20 | 12-10,4-6 |
| 55TB-1226BNL | 1CT:1.36CT &1CT:1.36CT | 1.20&1.20 | 0.80&0.80 | 50&50 | 1.20&1.20 | 1.40&1.40 | 1-3,4-6 |
| 55TB-1227BNL | 1CT:1.41CT &1 CT:1.41CT | 1.20&1.20 | 0.80&0.80 | 50&50 | 0.90&0.90 | 1.20&1.20 | 12-10,9-7 |
| 55TB-1228BNL | 1CT:2.3CT&1CT:2CT | 1.20&1.20 | 0.80&0.80 | 60*50 | 1.20&1.20 | 2.10&2.10 | 10-12,4-6 |
| STANDARD TEMPERATURE RANGE MODELS-OPERATING TEMPERATURE 0℃TO+70℃ | |||||||
| 57TB-1221BNL | 1CT:2CT&1CT:2CT | 1.20&1.20 | 0.60&0.60 | 35&35 | 0.70&0.70 | 1.20&1.20 | 12-10,4-6 |
| 57TB-1221ANL | 1CT:2CT&1:1.36CT | 1.20&1.20 | 0.60&0.60 | 35&37 | 0.70&0.70 | 1.20&0.90 | 12-10,4-6 |
| 57TB-1221ENL | 1:2CT&1:1.14CT | 1.20&1.20 | 0.55&0.80 | 40&35 | 0.70&0.70 | 1.20&0.90 | 12-10,4-6 |
| 57TB-1221CNL | 1CT:2CT&1:1 | 1.20&1.20 | 0.30-0.55&0.80 | 30&30 | 0.70&0.70 | 1.20&0.70 | 1-3,5-6 |
| 57TB-1521DNL | 1:1.15CT&1CT:2CT | 1.50&1.20 | 0.80&0.60 | 35&35 | 0.70&0.70 | 0.90&1.20 | 12-10,4-6 |
| 57TB-1522ENL | 1:1/1.26&1:2CT | 1.50&1.20 | 0.40&0.50 | 40&40 | 0.70&0.70 | 0.90&1.20 | 12-10,4-6 |
| 57TB-1222ANL | 1CT:2CT&1:1.08CT | 1.20&1.20 | 0.60&0.60 | 40&30 | 0.70&0.70 | 1.10&0.90 | 12-10,4-6 |
| 57TB-1521GNL | 1:1/1.26&1:1/1.26 | 1.50&1.50 | 0.40&0.40 | 45&45 | 0.80&0.80 | 1.00&1.00 | 12-10,9-7 |
Certification

- Mechanicals and Dimensions
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Details - Files Download
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Isolation T1/CEPT/ISDN-PRI Interface SMD Dual Transformer 55TB-57TB Series
T1/CEPT/ISDN-PRI Interface 1.5KVrms Isolation Dual Surface Mount Transformers PDF Catalogue
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SMD12 Dual Port T1/CEPT/ISDN-PRI Interface Transformer with 1500Vrms Isolation - 2-Port T1/CEPT/ISDN-PRI Magnetic Transformer | 1.5KV Isolated | 12-Pin SMD Surface Mount For industrial control and telecom equipment | Taiwan-Based Power Supply & Magnetic Components Manufacturer | YUAN DEAN SCIENTIFIC CO., LTD.
Based in Taiwan since 1990, YUAN DEAN SCIENTIFIC CO., LTD. has been a power converter, transformer, magnetic components manufacturer in Electronic Components Industry. Their main products, include SMD12 Dual Port T1/CEPT/ISDN-PRI Interface Transformer with 1500Vrms Isolation, DC-DC Converters, AC-DC Converters, RJ45 Magnetics, Converter Transformers, LAN Filters, High Frequency Transformers, POE Transformers, Inductors and LED drivers, which are RoHS approved with ERP system implemented.
YDS was established in 1990 at Tainan, Taiwan and our factory Ho Mao electronics was established in 1995 at Xiamen, China. We are the leading electronic manufacturer with ISO 9001, ISO 14001 and IATF16949 certified. We Produce various products such as DC/DC converter, AC/DC converter, RJ45 with magnetics, 10/100/1G/2.5G/10G Base-T Lan filter, all kinds of Transformer,Lighting products and Power bank. ISO 9001 & ISO 14001, IATF16949 certified power converter, high frequency transformer, magnetic component with reliable EMC and EMI / EMS / EDS lab tests. Power converter solutions for medical, railway, POE, etc.
YDS has been offering customers high-quality power supply and magnetic components, both with advanced technology and 25 years of experience, YDS ensures each customer's demands are met.


















