TEW5281-1-2-3 is a receive transformer, complies with ANSI T1.408 and CCITT I.431, and is suitable for main network nodes, PBX or computers to T1/CEPT digital trunks.
The TEW5281 is designed and approved for use as a receive transformer in T1 and CEPT applications. It supports devices such as Dallas DS2187, PMC‑Sierra PM4341T1X, AT&T T7290 and EXAR T5683.
The transformer meets standards ANS‑T1.408, CCITT 1.431, G.703 and BS6328, and is BABT certified for reinforced insulation to EN60950 and EN41003. Electrical specifications include line impedance, DCR, turns ratio, inductance and dielectric strength.
| Line Impedance | 100 Ω, 120 Ω |
|---|---|
| DCR (Ohms) nominal (1‑3) | 1.55 Ω |
| DCR (Ohms) nominal (6‑4) | 0.85 Ω |
| Turns Ratio (6‑4):(1‑3) | 1:2 |
| Inductance (6‑4) | >3.5 mH |
| Dielectric Strength | 4000 Vrms |
| Certification | BABT certified to EN60950 & EN41003 |
The transformer has a dielectric strength of 4000 Vrms.