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EFD25 Flyback Transformer

EFD25 optocoupler-free flyback transformer features long-term stable regulation, simplified circuit, compact size and high flexibility, providing reliable isolated power solutions for telecom, sensor and PoE applications.

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Product Description

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Characteristics:

·Simple design integration & few external components
·Compact board size & cost-effective
·Optocoupler-free design
·Reliable long-term voltage regulation, no performance degradation
·Uniform external components across output voltages
·Easy power supply customization via transformer & two feedback loop components adjustment

Common Applications:

·Ideal for isolated power designs, sensor interfaces, isolated telecom converters & Power over Ethernet

Physical Properties

Order Code	VIN	Vout1 (V)	lout1 (A)	Vout2 (V)	lout2 (A)	Vout3 (V)	lout3 (A)	Vout4 (V)	lout4 (A)	Vaux (V)	L (μH)	n	lSAT (A)	Ls (μH)	VT (V(AC))
INF-EFD25-14μH	12V(DC)	48	0.85	-	-	-	-	-	-	-	14	1:4.42	15	0.2	1500
INF-EFD25-20μH	19-70V(DC)	24	2.5	-	-	-	-	-	-	12	20	1.5:1:0.5	16	0.225	1500
INF-EFD25-6μH	20-48V(DC)	5	9	-	-	-	-	-	-	10	6	3:1:2	18	0.4	1500
INF-EFD25-8μH	20-48V(DC)	15	3	-	-	-	-	-	-	10	8	1.5:1:0.67	20	0.4	1500
INF-EFD25-8μH	20-48V(DC)	12	3.8	-	-	-	-	-	-	10	8	2:1:1	18	0.4	1500
INF-EFD25-8μH	20-48V(DC)	24	1.9	-	-	-	-	-	-	10	8	1:1:0.44	18	0.4	1500
INF-EFD25-37μH	28V(DC)	250	0.1	-	-	-	-	-	-	-	37	1:2.5:2.5	2.95	0.16	500
INF-EFD25-15μH	30-75V(DC)	5	9	-	-	-	-	-	-	10	15	3.5:1:2	18	0.4	1500
INF-EFD25-12μH	30-75V(DC)	15	3	-	-	-	-	-	-	10	12	2:1:0.8	16	0.4	1500
INF-EFD25-15μH	30-75V(DC)	12	3.8	-	-	-	-	-	-	10	15	2.33:1:0.83	18	0.55	1500
INF-EFD25-12μH	30-75V(DC)	24	1.9	-	-	-	-	-	-	10	12	1.5:1:0.5	18	0.4	1500
INF-EFD25-500μH	100-400 V(DC)	15	3	-	-	-	-	-	-	15	500	3:3:1:1	2.5	10	2000

Technical Specifications

屏幕截图 2025-10-30 161244

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