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Add : Room 701, Building A1, No. 55 Runfa Road, Jiangning District, Nanjing, China
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1. Optimized EF20 Core for Compact Flyback Designs
The EF20 ferrite core provides an ideal balance between power density and compact size, making it suitable for space-constrained SMPS applications.
2. Designed for Offline Flyback Topology
Specifically engineered for AC-DC flyback converters, enabling efficient energy storage and transfer with stable output performance.
3. High Efficiency & Low Heat Generation
Advanced magnetic design minimizes core and copper losses, improving efficiency and reducing thermal stress on surrounding components.
4. Multiple Output Capability
Supports multiple secondary windings, allowing several output voltages from a single transformer, reducing system cost and complexity.
5. Reinforced Insulation & Safety Compliance
Provides reliable primary-to-secondary isolation with high dielectric strength (up to ~4kV), meeting international safety standards.
1. Switching Power Supplies (SMPS)
Widely used in offline AC-DC flyback converters for consumer electronics and industrial systems.
2. Power Adapters & Chargers
Ideal for compact adapters, mobile chargers, and auxiliary power supplies requiring isolation and efficiency.
3. LED Drivers & Lighting Systems
Suitable for LED power supplies with high efficiency and stable current output.
4. Smart Home & Consumer Electronics
Used in devices such as smart controllers, set-top boxes, and household electronics.
5. Industrial Control Systems
Provides auxiliary and control power for PLCs, automation equipment, and control boards.
6. Communication & Networking Equipment
Applied in routers, modems, and telecom systems requiring stable isolated power.
7. DC-DC Converters & Auxiliary Power Modules
Used in embedded systems and multi-output power modules.
Physical Properties
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vaux (V) | RDC1 (Ω) | RDC2 (Ω) | RDC3 (Ω) | RDC4 (Ω) | fswitch (kHz) | L(μH) | n | lSAT (A) | VT (V(AC)) |
| INF-EF20-700μH | 90-265V(AC) | 28 | 0.5 | 24 | 1.34 | 0.058 | 2 | - | 100 | 700 | 4:1:0.86 | 1.5 | 4500 |
| INF-EF20-2750μH | 99-269V(AC) | 12 | 1 | 12 | 1.725 | 0.037 | 0.41 | - | 50 | 2750 | 10:1:1 | 0.5 | 4000 |
| INF-EF20-2400μH | 99-269V(AC) | 48 | 0.3 | 12 | 1.4 | 0.425 | 0.32 | - | 50 | 2400 | 2.5:1:0.25 | 0.49 | 4000 |
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 |
