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Add : Room 701, Building A1, No. 55 Runfa Road, Jiangning District, Nanjing, China
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The EFD25 Flyback Transformer is designed for compact DC-DC converter and switching power supply systems requiring efficient high-frequency energy transfer, reliable electrical isolation, and optimized low-profile PCB integration.
Built with an EFD25 ferrite core structure, the transformer provides high power density and improved space efficiency while maintaining stable operation under high-frequency switching conditions.
Optimized for flyback and DC-DC converter topologies, the EFD25 platform is suitable for compact electronic systems where low height, thermal performance, and stable electrical characteristics are critical design requirements.
The transformer is widely used in industrial electronics, communication equipment, embedded power systems, and compact SMPS applications.
Customized turns ratios, insulation systems, output configurations, and winding structures are available according to application requirements.
Optocoupler-free feedback design removes aging hidden dangers and improves long-term operation reliability
Simplified peripheral circuit scheme reduces external components and cuts overall system design and production costs
Universal external component configuration supports multiple output voltages with flexible replacement and adjustment
DC-DC Converter Systems
Switching Power Supplies
Communication Equipment
Embedded Power Modules
Industrial Electronics
Compact Power Adapters
General SMPS Applications
Physical Properties
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vout2 (V) | lout2 (A) | Vout3 (V) | lout3 (A) | Vout4 (V) | lout4 (A) | Vaux (V) | L (μH) | n | lSAT (A) | Ls (μH) | VT (V(AC)) |
| INF-EFD25-14μH | 12V(DC) | 48 | 0.85 | - | - | - | - | - | - | - | 14 | 1:4.42 | 15 | 0.2 | 1500 |
| INF-EFD25-20μH | 19-70V(DC) | 24 | 2.5 | - | - | - | - | - | - | 12 | 20 | 1.5:1:0.5 | 16 | 0.225 | 1500 |
| INF-EFD25-6μH | 20-48V(DC) | 5 | 9 | - | - | - | - | - | - | 10 | 6 | 3:1:2 | 18 | 0.4 | 1500 |
| INF-EFD25-8μH | 20-48V(DC) | 15 | 3 | - | - | - | - | - | - | 10 | 8 | 1.5:1:0.67 | 20 | 0.4 | 1500 |
| INF-EFD25-8μH | 20-48V(DC) | 12 | 3.8 | - | - | - | - | - | - | 10 | 8 | 2:1:1 | 18 | 0.4 | 1500 |
| INF-EFD25-8μH | 20-48V(DC) | 24 | 1.9 | - | - | - | - | - | - | 10 | 8 | 1:1:0.44 | 18 | 0.4 | 1500 |
| INF-EFD25-37μH | 28V(DC) | 250 | 0.1 | - | - | - | - | - | - | - | 37 | 1:2.5:2.5 | 2.95 | 0.16 | 500 |
| INF-EFD25-15μH | 30-75V(DC) | 5 | 9 | - | - | - | - | - | - | 10 | 15 | 3.5:1:2 | 18 | 0.4 | 1500 |
| INF-EFD25-12μH | 30-75V(DC) | 15 | 3 | - | - | - | - | - | - | 10 | 12 | 2:1:0.8 | 16 | 0.4 | 1500 |
| INF-EFD25-15μH | 30-75V(DC) | 12 | 3.8 | - | - | - | - | - | - | 10 | 15 | 2.33:1:0.83 | 18 | 0.55 | 1500 |
| INF-EFD25-12μH | 30-75V(DC) | 24 | 1.9 | - | - | - | - | - | - | 10 | 12 | 1.5:1:0.5 | 18 | 0.4 | 1500 |
| INF-EFD25-500μH | 100-400 V(DC) | 15 | 3 | - | - | - | - | - | - | 15 | 500 | 3:3:1:1 | 2.5 | 10 | 2000 |
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 |
