English 
Add : Room 701, Building A1, No. 55 Runfa Road, Jiangning District, Nanjing, China
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The ER11.5 Power over Ethernet (PoE) Transformer is designed for reliable power and data transmission in Ethernet networking systems. Built with a high-quality ER11.5 ferrite core and precision winding technology, it provides stable signal isolation, efficient power transfer, and excellent EMI performance for PoE applications.
This transformer is widely used in PoE switches, IP cameras, wireless access points, VoIP systems, and industrial communication equipment. Its compact structure supports high-density PCB layouts while maintaining long-term electrical and thermal stability.
Customized winding structures, pin layouts, and electrical configurations are available to meet different network power requirements.
Designed for Power over Ethernet (PoE) applications
Stable signal isolation and efficient power transmission
ER11.5 ferrite core with low loss characteristics
Excellent EMI suppression performance
Compact structure for space-saving PCB layouts
Reliable thermal and electrical stability
Suitable for high-speed communication systems
Customizable winding and pin configurations
PoE Switches and Injectors
IP Cameras and Security Systems
Wireless Access Points (AP)
VoIP Phones and Communication Devices
Industrial Ethernet Equipment
Smart Building and IoT Systems
Network Communication Modules
Physical Properties
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vout2 (V) | lout2 (A) | Vout3 (V) | lout3 (A) | L(μH) | n | VT(V(AC)) |
| INF-ER11/5-400μH | 36-57V(DC) | 3.3 | 0.4 | 3.3 | 0.4 | 3.3 | 0.4 | 400 | 1:3:3:3:3:1 | 1500 |
| INF-ER11/5-400μH | 36-57V(DC) | 5 | 0.27 | 5 | 0.27 | 5 | 0.27 | 400 | 7.2:1:1:1:1.8 | 1500 |
Technical Specifications
| Main Category | Subcategory | Details |
| MOQ | Prototyping & Small-batch | 10 piece minimum order |
| Sample Service | Free proofing & custom service, 5 free samples (shipping at buyer’s cost) | |
| Bulk Order | 5,000 pieces and above with bulk pricing | |
| Lead Time | All Standard Components | Shipped within 5–7 working days |
| Custom Inductance / Pin Design (Sample) | Sample order confirmed within 5–7 working days | |
| Custom Inductance / Pin Design (Mass Order) | Shipped within 15–30 working days | |
| Payment Terms | Main Payment Term | T/T in advance, L/C at sight |
| Procurement Standard | Complies with global enterprise procurement standard for passive components | |
| Quality Deposit | No quality security deposit required | |
| Accepted Terms | FOB Shanghai / Nanjing / Hong Kong, T/T Advance | |
| Quality Assurance | Manufacturing Defects | Free replacement for issues caused by manufacturing defects |
| Inspection Report | Batch inspection reports available as certification upon customer request | |
| Packaging Specifications | Updated Packaging (2026) | Blister tray packaging; Sealed Tape & Reel for SMD products |
| Optional Packaging | Vacuum sealed packaging for customers with strict moisture-proof requirements |
