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EFD25 5+5 Pin THT AC Transformer for SMPS, 20–50W High Efficiency Low Profile Power Transformer

Relative to the EFD20, the EFD25 comes with a bigger magnetic core for higher power handling capacity. Unlike the SMT version, the THT model is assembled via pin insertion and soldering onto PCB mounting holes, with vertical installation as the standard option. This configuration ensures stronger mechanical steadiness and better heat dissipation capabilities.

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EFD25 THT AC Transformer EFD25 transformer EFD25 High Frequency Transformer EFD25 ferrite transformer EFD25 switching transformer EFD25 SMPS transformer EFD25 Flyback Transformer EFD25 offline transformer EFD25 power transformer Custom EFD25 high frequency transformer

Product Description

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Product Overview

The EFD25 THT AC transformer is a medium-power magnetic component designed for high-frequency switching power supplies. It offers enhanced power handling capability compared to smaller EFD models, making it suitable for applications requiring stable output under higher load conditions.

Characteristics

Universal input voltage from 85VAC up to 265VAC
Switching frequency: 68kHz to 250kHz
Low Profile
Insulation test voltage: 4500VAC
Operating temp: -40°C to +125°C

Common Applications

SMPS with power up to 34W
Auxiliary power supplies
Power electronics
White goods
LED lighting

Physical Properties

Order Code	VIN	Vout1 (V)	lout1 (A)	Vout2 (V)	lout2 (A)	Vout3 (V)	lout3 (A)	Vaux (V)	Vaux2 (V)	Vaux 1 (V)	fswich (kHz)	L (μH)	NPRI:NSEC:NAUX	lSAT (A)	VT (V(AC))
INF-EFD25-770μH	85-265V(AC)	5	1.575	5	1.575	-	-	20	14	6	68-120	770	20:1:1:2.75:1.25	2	4500
INF-EFD25-450μH	85-265V(AC)	12	1.3	12	1.3	-	-	20	14	6	68-100	450	16.66:2:2.33:1	2.1	4500
INF-EFD25-470μH	85-265V(AC)	24	0.71	24	0.71	-	-	20	14	6	68-100	470	16.66:4:4:2.33:1	2	4500
INF-EFD25-414μH	85-265V(AC)	16	1.64	-	-	-	-	20	14	6	68-110	414	16:2.33:2:1	2.2	4500
INF-EFD25-460μH	85-265V(AC)	32	1	-	-	-	-	20	14	6	68-110	460	16:4.66:2:1	1.9	4500
INF-EFD25-500μH	85-265V(AC)	40	0.8	-	-	-	-	20	14	6	68-105	500	16.66:6.33:2.33:1	1.9	4500
INF-EFD25-468μH	85-265V(AC)	5	1.7	12	2	-	-	20	14	6	68-250	468	20:1:2.33:2.66:1.33	2.5	4500
INF-EFD25-793μH	85-265V(AC)	5	1.1	24	0.6	-	-	20	14	6	68-170	793	20:4.5:1:2.75:1.25	2	4500

Technical Specifications

屏幕截图 2025-10-30 162338

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