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Add : Room 701, Building A1, No. 55 Runfa Road, Jiangning District, Nanjing, China
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The EFD15 offline transformer is a compact, low-profile magnetic component designed for small-power switching power supplies. Based on the EFD ferrite core structure, it enables efficient energy transfer while minimizing height and PCB footprint.
Designed for Flyback & SMPS Topologies
Optimized specifically for flyback converter applications, balancing energy storage and efficient power transfer.
Low Leakage & High Performance
EFD15 construction reduces magnetic leakage and improves transformer coupling efficiency.
Enhanced Thermal Management
Efficient core design helps control temperature rise and supports continuous operation.
Customizable to Your Circuit Requirements
Turn ratios, bobbin configurations, and output specifications can be tailored for your design.
Low-power AC-DC adapters
Smart home and IoT devices
Standby power modules
Small household appliances
LED low-power drivers
Control circuit auxiliary power
Physical Properties
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vout2 (V) | lout2 (A) | Vout3 (V) | lout3 (A) | L (μH) | n | VT (V(AC)) |
| INF-EFD15-120μH-01 | 36-57V(DC) | 1.8 | 2.4 | 1.8 | 2.4 | 1.8 | 2.4 | 120 | 14:1:1:1:5.5 | 1500 |
| INF-EFD15-120μH-02 | 36-57V(DC) | 3.3 | 1.35 | 3.3 | 1.35 | 3.3 | 1.35 | 120 | 12:1:1:1:3 | 1500 |
| INF-EFD15-120μH-03 | 36-57V(DC) | 5 | 0.9 | 5 | 0.9 | 5 | 0.9 | 120 | 7.2:1:1:1:1.8 | 1500 |
| INF-EFD15-120μH-04 | 36-57V(DC) | 12 | 1.2 | 5 | 2.8 | 3.3 | 4.3 | 120 | 15:1.5:1:3:5 | 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 |
