Low Profile High Frequency EFD20 SMD Transformer for Compact Power Supply Unit

The EFD20 series (Economical Flat Design) represents a significant evolutionary step in magnetic component engineering, specifically developed for high-density switching mode power supplies (SMPS) where vertical space is at a premium. As electronic devices transition toward "Slim-Profile" and "High-Power Density" designs, traditional EE or EF core transformers often fail to meet the height constraints of modern 1U server racks or slim-line power adapters.

Our CHIPSEN MTEFD20-951-14519 series is the flagship of this category, integrating advanced Mn-Zn ferrite core technology with precision SMD termination. Every unit is manufactured under strictly controlled environments to ensure reliable performance under extreme stress of 100kHz to 500kHz switching frequencies.

• Ultra-Low Profile Footprint: Engineered for slim-line PCB layouts, minimizing overall thickness without sacrificing output capacity (10W-30W typical)
• Premium PC95 High-Frequency Core: Utilizes high-saturation magnetic flux density ferrite material maintaining low power loss at high temperatures
• Precision SMT Pin Coplanarity: Gull-wing SMD pins with coplanarity tolerance within 0.1mm for perfect solder joints
• Minimal Leakage Inductance: Proprietary sandwich winding techniques reduce EMI noise and protect switching MOSFETs
• Total Galvanic Isolation & Safety: Complies with UL (E332338) and IEC standards, withstands high-voltage surges (3750V AC+)
• Superior Acoustic Damping: Vacuum pressure impregnation process eliminates audible "whining" caused by magnetostriction

The EFD20 features a planar-style horizontal bobbin design that allows for more turns of wire without increasing vertical stack. Made from high-strength phenolic resin or LCP (Liquid Crystal Polymer), it offers superior mechanical rigidity and high-temperature stability during 260°C reflow soldering.

Advanced winding and insulation geometry utilizes CNC-controlled automated winding machines with real-time tension monitoring. For high-frequency designs, we often utilize Triple Insulated Wire (TIW) for secondary winding, maximizing window fill factor while maintaining reinforced insulation.

The vacuum pressure impregnation (VPI) process bonds components into a solid, moisture-proof block, making units immune to humidity and corrosive industrial gases while eliminating audible noise.

5G Telecommunications & Networking: Compact, highly efficient auxiliary power supplies for micro-cells, distributed gateways, and network switches with low EMI signature.

Portable Medical & Home-Healthcare: High-voltage isolation (3750V+) meets medical safety standards while maintaining slim-profile for portable devices with silent operation.

Internet of Things (IoT) & Smart Home: Compact AC-DC converters for smart plugs, home automation gateways, and security cameras with high efficiency for energy regulations compliance.

Chipsen Electronics is a professional manufacturer specializing in high-performance transformers and magnetic components, with more than 26 years of manufacturing expertise. Founded in 2000, we operate 4 production bases covering over 7,200 square meters with 400+ skilled employees.

We hold authoritative certifications including ISO9001, ISO14001 and IATF16949, with products approved by UL Class B/F/H, CQC, RoHS and REACH. Our portfolio includes 200+ product types with flexible custom development services.

• Full Service Customization: Rapid design support within 24-48 hours
• Extensive Product Portfolio: 200+ product types including transformers, inductors, filters
• Advanced Manufacturing Capability: Automated winding and assembly machines
• Strict Quality Control System: 100% testing procedures
• High Voltage & High Frequency Expertise: 5KV to 40KV transformers
• Flexible MOQ & Fast Lead Time: 7 to 15 days lead time
• OEM/ODM Supported with Competitive Factory Direct Pricing