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EF13 3+3 Pin Offline Flyback Transformer for Compact AC-DC Power Supply, Miniature High Frequency Transformer

Features：

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

Core Material:

MnZn (Manganese Zinc) ferrite, such as PC40, N87 and other high-frequency low-loss materials.

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

Quantity:
Availability:





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Product Description

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Product Overview

The EF13 flyback transformer is a compact magnetic component designed for low-power offline AC-DC converters. It is optimized for applications requiring minimal footprint and high switching frequency.

Miniaturization Advantage

With its small EF core size, the transformer significantly reduces PCB space usage while maintaining reliable electrical performance.

High-Frequency Optimization

Designed for high switching frequency operation
Reduced copper loss and improved efficiency
Optimized for fast transient response

Typical Applications

Phone chargers / USB adapters
Smart home power modules
Small appliance control boards
Standby power supplies

Technical Specifications

屏幕截图 2025-10-30 151921

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