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EE5 Current Sense Transformer for Current Detection and Switching Power Applications

The EE5 series represents a compact, surface-mount current transformer family engineered for precision and reliability in demanding power electronics. Featuring a low-profile EE5 core, this series is specifically designed for automated SMD assembly, enabling high-density PCB layouts without sacrificing performance.

These transformers excel with an operational frequency extending up to 1 MHz and a robust primary current rating of 40 A, supported by outstanding thermal stability and minimal phase shift across a wide temperature range from -40 °C to +130 °C. This combination ensures accurate, low-drift current sensing for both small and large signals within a wide dynamic range.

Ideal for a broad spectrum of industrial and commercial applications, the EE5 series is perfectly suited for AC current detection and metering in switch-mode power supplies (SMPS) and energy converters. It provides critical overload sensing and load drop/shutdown detection in motor drives, battery management systems (BMS), and industrial controls. Furthermore, its high-frequency capability makes it indispensable for current monitoring in solar inverters, renewable energy systems, and telecom/internet infrastructure equipment.

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EE5 Current Sence Transformers

Product Description

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Product Overview

The EE5 Current Sense Transformer is designed for high-frequency current monitoring, feedback control, and protection circuits in switching power supply systems. Utilizing a compact EE5 ferrite core structure, the transformer provides reliable current sensing capability and stable signal transmission for modern power electronic applications.

Optimized for current detection and control architectures, the transformer supports accurate current feedback and electrical isolation while maintaining compact PCB integration.

Its miniature magnetic structure makes it especially suitable for space-constrained electronic systems requiring stable monitoring performance and high-frequency operational reliability.

Customized turns ratios, sensing characteristics, insulation specifications, and winding configurations are available according to customer requirements.

Key Features

EE5 miniature ferrite core structure
Designed for current sensing applications
Stable high-frequency signal transmission
Reliable electrical isolation capability
Accurate current monitoring performance
Compact PCB integration design
Suitable for SMPS control systems
Flexible customization support

Typical Applications

Switching Power Supplies
Current Feedback Circuits
Overcurrent Protection Systems
Power Control Modules
DC-DC Converter Systems
Industrial Electronic Equipment
High-Frequency Monitoring Circuits

Physical Properties

Order Code	L(μH)	n	lR(A)	∫Udt(μVs)	VT(V(AC))	RDC1(mΩ)	RDC2(Ω)
INF-EE5-80μH	80	1:20	20	10	500	0.75	0.2
INF-EE5-180μH	180	1:30	20	15	500	0.75	0.48
INF-EE5-320μH	320	1:40	20	20	500	0.75	0.9
INF-EE5-500μH	500	1:50	20	25	500	0.75	1.4
INF-EE5-720μH	720	1:60	20	30	500	0.75	1.75
INF-EE5-980μH	980	1:70	20	35	500	0.75	2.2
INF-EE5-2000μH	2000	1:100	20	50	500	0.75	5.5
INF-EE5-3000μH	3000	1:125	20	68	500	0.75	6.5
INF-EE5-4500μH	4500	1:150	20	75	500	0.75	9.5
INF-EE5-8000μH	8000	1:200	20	100	500	0.75	16.5
INF-EE5-12500μH	12500	1:250	20	125	500	0.75	23.5

Technical Specifications

屏幕截图 2025-10-30 144741

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