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Add : Room 701, Building A1, No. 55 Runfa Road, Jiangning District, Nanjing, China
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The EFD20 THT AC Transformer is a compact and efficient high-frequency transformer designed for switching power supply applications. Featuring a through-hole (THT) mounting structure, it ensures robust mechanical stability and reliable performance in demanding industrial environments. Its EFD core design allows for optimized space utilization while maintaining excellent electrical characteristics.
Material Excellence:
Nano-crystalline hybrid core materials
High-purity copper substrates
Full material traceability
Manufacturing Capabilities:
Class 100K cleanroom production
IATF 16949 & ISO 9001 certified
100% electrical + thermal testing
This transformer is widely used in various electronic and power conversion systems, including:
Switching power supplies (SMPS)
AC-DC converters
Industrial control equipment
LED power drivers
Consumer electronics
Smart home and IoT devices
Physical Properties
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vout2 (V) | lout2 (A) | Vout3 (V) | lout3 (A) | Vaux (V) | Vaux2 (V) | Vaux1 (V) | fswitch (kHz) | L (μH) | NPRI:NSEC:NAUX | lSAT (A) | VT (V(AC)) |
| INF-EFD20-800μH-01 | 85-265V(AC) | 5 | 1.3 | 5 | 1.3 | - | - | 20 | - | - | 68-110 | 800 | 5.26:0.26:0.26:1 | 1.4 | 4500 |
| INF-EFD20-800μH-02 | 85-265V(AC) | 12 | 0.85 | 12 | 0.85 | - | - | 20 | - | - | 68-110 | 800 | 9.09:0.27:1.18:1 | 1.4 | 4500 |
| INF-EFD20-800μH-03 | 85-265V(AC) | 24 | 0.4 | 24 | 0.4 | - | - | 20 | - | - | 68-150 | 800 | 11.11:1.88:1 | 1.4 | 4500 |
| INF-EFD20-800μH-04 | 85-265V(AC) | 16 | 1.15 | - | - | - | - | 20 | - | - | 68-130 | 800 | 8.333:1:1.25 | 1.4 | 4500 |
| INF-EFD20-800μH-05 | 85-265V(AC) | 32 | 0.75 | - | - | - | - | 20 | - | - | 68-170 | 800 | 11.11:1.55:1 | 1.4 | 4500 |
| INF-EFD20-800μH-06 | 85-265V(AC) | 40 | 0.58 | - | - | - | - | 20 | - | - | 68-180 | 800 | 6.66:0.8:1 | 1.4 | 4500 |
| INF-EFD20-800μH-07 | 85-265V(AC) | 5 | 1.8 | 12 | 0.9 | - | - | 20 | - | - | 68-170 | 800 | 6.66:0.6:0.6:1 | 1.4 | 4500 |
| INF-EFD20-800μH-08 | 85-265V(AC) | 5 | 1.2 | 24 | 0.62 | - | - | 20 | - | - | 68-220 | 800 | 8.33:1.16:1.16:1 | 1.4 | 4500 |
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 |
