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Line Frequency Current Sense Transformer EI187

EI187 High Frequency Transformer for Ultra-High Power SMPS, Inverter & Energy Systems

This component, featuring a primary current rating of up to 45A, a frequency range of 47Hz to 400Hz, and an operating temperature span from -40 °C to +125 °C, comes in a low-profile, compact through-hole (THT) form factor; it is commonly applied in scenarios such as AC current detection, fixed EV chargers in streets and garages, overload sensing, load drop/shutdown detection, industrial automation, control and monitoring applications, and motor controls.

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Product Description

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Application Fields

The EI187 high frequency transformer is widely used in high-power and energy-critical systems:

Industrial power supplies and automation systems
Renewable energy systems (solar inverters, energy storage)
UPS and backup power systems
High-power DC-DC and AC-DC converters
Telecom infrastructure and server power systems

High-frequency transformers are essential in applications requiring efficient and compact power conversion.

Physical Propertie

Order Code	L (mH)	n	l_R (A)	∫Udt (Vμs)	V_T (V(AC))	R_{DC1 max.} (mΩ)	R_{DC2 max.} (Ω)
INF-EI187-400mH	400	1:500	45	30000	4000	0.27	16.2
INF-El187-1600mH	1600	1:1000	45	60000	4000	0.27	78.7
INF-EI187-3600mH	3600	1:1500	45	90000	4000	0.27	178
INF-E187-6400mH	6400	1:2000	45	120000	4000	0.27	317
INF-EI187-10000mH	10000	1:2500	45	150000	4000	0.27	468
INF-EI187-14400mH	14400	1:3000	45	180000	4000	0.27	747

Technical Specifications 屏幕截图 2025-10-23 094947

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