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EFD25(6+6) AC Transformer

Characteristics:

· 85–265 VAC / 120–375 VDC input
· Compact size, low leakage inductance
· Multiple output options
· –40 °C to +125 °C operation
· Fixed-frequency or quasi-resonant modes
Options:
· Universal 85-265VAC input, 68-250kHz switching frequency
· Low-profile design, 4500VAC insulation test voltage, -40°C to +125°C operating temp
· For 34W-max SMPS, auxiliary power supplies, power electronics
· Ideal for white goods and LED lighting systems

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Product Description

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Core Advantages

1. Compact EFD25 Core Structure
The EFD25 core features an optimized footprint that balances power density and board space, ideal for medium‑power applications requiring compact design and efficient layout.

2. High Insulation & Safety Performance
Designed with reinforced insulation and creepage/clearance distances that meet international safety standards, providing reliable primary–secondary isolation.

3. Excellent Voltage Regulation
Precisely engineered winding design delivers stable output voltage with minimal fluctuation under varying load conditions, improving end‑product reliability.

4. High Efficiency with Low Heat Generation
Optimized core and winding materials reduce core and copper loss, enhancing efficiency and reducing system thermal stress.

5. Wide Operating Temperature Range
Reliable performance across a broad temperature range, making it suitable for both industrial and consumer environments.

6. Low Noise Operation & Vibration Resistance
Optimized magnetic design contributes to reduced audible noise and enhanced reliability in sensitive electronics.

Common Applications:

· Industrial control systems
· USB charging devices
· Utility metering equipment
· Process control systems
· Factory automation applications
· Security systems
· Auxiliary power supplies for garage door openers
· Home appliances
· Specifically designed for multiple

· Texas Instruments ICs

Physical Properties

Order Code	VIN	Vout1 (V)	lout1 (mA)	Vout2 (V)	lout2 (mA)	Vout3 (V)	lout3 (mA)	Vaux (V)	Vaux2 (V)	L (μH)	fswich (kHz)	NPRI:NSEC:NAUX	lSAT (A)	VT (V(AC))
INF-EFD25-380μH	85-265V(AC)	12	3000	-	-	-	-	12	-	380	60-120	7:1:1	3.3	4500

Technical Specifications

屏幕截图 2025-10-30 163359

Customization & Procurement

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
Quality Assurance	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
Packaging Specifications	Optional Packaging	Vacuum sealed packaging for customers with strict moisture-proof requirements