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EF25 Horizontal (5+5) Offline Transformers

EF25 Horizontal 5+5 Pin Flyback Transformer for Offline SMPS Power Supply, High Efficiency 15–45W Switching Transformer

EF25 Horizontal (5+5) offline transformer features wide input voltage, low leakage, compact size and high insulation, providing stable and efficient conversion for industrial control, chargers, automation and household appliance power supplies.

Features：

Small size, Low leakage inductance, Multiple-output options, Nominal input voltage:85–265VAC(120–375VDC)

Applications：
Industrial controls,USB chargers,Utility metering devices, Process controls, Factory automation, Security systems, Garage door opener auxiliary supplies, Home appliances

Power Rating: In an offline flyback topology, EF25-size transformers typically deliver a power handling capability ranging from 30W to 60W, with actual performance dependent on switching frequency and design configurations.

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Product Description

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Product Overview

This EF25 horizontal flyback transformer is designed for medium-power offline switching power supplies. Built with a ferrite EF core structure, it offers an optimal balance between power density, thermal stability, and cost efficiency.

Performance Advantages

High efficiency magnetic coupling with low core loss
Stable operation across wide temperature range
Low leakage inductance for improved EMI performance
Suitable for continuous operation under medium power load

Application Scenarios

Switching power supplies (SMPS)
LED drivers and lighting systems
Industrial control power modules
Consumer electronics adapters

Technical Specifications

屏幕截图 2025-10-30 153151

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