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| PartNumber | TX1281NL | TX1281T | TX1281 |
| Description | Audio & Signal Transformers Transformers Audio & Signal SMT SGL T1/E1 XFMR | Audio & Signal Transformers Transformers Audio & Signal SMT SGL T1/E1 XFMR | |
| Manufacturer | - | Pulse Electronics Corporation | Pulse Electronics Corporation |
| Product Category | - | Pulse Transformers | Pulse Transformers |
| Series | - | * | TX1281 |
| Product | - | LAN | LAN |
| Type | - | Module | Module |
| Packaging | - | Reel | Bulk |
| Termination Style | - | SMD/SMT | SMD/SMT |
| Operating Temperature Range | - | - 40 C to + 85 C | - 40 C to + 85 C |
| Height | - | 5.08 mm | 5.08 mm |
| Length | - | 5.59 mm | 5.59 mm |
| Width | - | 5.84 mm | 5.84 mm |
| Mounting Type | - | - | - |
| Size Dimension | - | - | - |
| Number of Channels | - | Single | Single |
| Height Seated Max | - | - | - |
| Shielding | - | Unshielded | Unshielded |
| Transformer Type | - | - | - |
| Turns Ratio PrimarySecondary | - | - | - |
| Inductance | - | - | - |
| E T | - | - | - |
| Application | - | T1/CEPT/ISDN-Pri | T1/CEPT/ISDN-Pri |
| Isolation Voltage | - | 1.5 kV | 1.5 kV |
| Primary Resistance | - | 2.7 Ohms | 2.7 Ohms |
| Secondary Resistance | - | 2.7 Ohms | 2.7 Ohms |
| Maximum DC Resistance | - | - | 2.7 Ohms |