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Frame Core Chokes SQ2018 Vertical Series

Frame Core Chokes SQ2118/2418/2820/2025 Vertical

Typical Application Scenarios
New Energy Systems
DC-AC isolation transformers for photovoltaic inverters (1kW string-type design).
LLC resonant conversion modules for electric vehicle on-board chargers (OBC).

Industrial Power Supplies
High-voltage power supplies (800V - 1500V DC) for industrial lasers and plasma cutters.
DC-Link energy storage inductors for servo drives, ensuring stable performance in current transformers and high-frequency transformers.

Communications and Data Centers
48V→12V POL power modules for 5G base stations.
Isolated DC-DC converters for server redundant power supplies, ensuring reliable energy conversion in current transformers and high-frequency transformers.

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Model:
SQ2118/2418/2820/2025 Vertical
Brand:
INF

Frame Core Chokes SQ2118/2418/2820/2025 Vertical SQ Common Mode Choke SQ Common Mode Choke Coil SQ Common Mode Choke Inductor SQ Ferrite Core Common Mode Choke Square Core Common Mode Choke SQ EMI Filter Choke SQ EMI Suppression Choke

Product Description

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Product Model: SQ2418 - High-Frequency Transformer

Features:

High Load Capability:The SQ2418 transformer has a strong load capability, capable of handling high current and power, making it ideal for high-demand industrial equipment and power systems.
Excellent Thermal Control Performance:The transformer features excellent heat dissipation and thermal control capabilities, ensuring stable operation in high-temperature environments, maintaining the equipment's safety and efficiency.
Multi-Functional Applications:The SQ2418 is widely used in power supply systems, communications, audio, industrial automation, and other applications that require high power and stability.

Model Comparison Table

Test Condition:1KHz/0.3V AT(25℃)

Specifications and Electrical Characteristics

SQ2118 Vertical

INF Code	Inductance	Wire Diameter	Turns	DC Resistance	Application Enameled Wire	Operating Current	Applicable Power
SQ2118-7mH	7mH	0.3*1.5	37	80mΩ MAX	0.75	3.15～4.05A	150～360W
SQ2118-12mH	12mH	0.25*1.5	42	100mΩ MAX	0.57	2.62～3.75A	150～340W
SQ2118-12mH	12mH	0.25*1.2	45	100mΩ MAX	0.62	2.4～3.6A	150～320W
SQ2118-18mH	18mH	0.2*1.5	53	120mΩ MAX	0.62	2.4～3.6A	150～320W
SQ2118-20mH	20mH	0.18*1.0	58	180mΩ MAX	0.50	1.44～2.16A	150~200W

SQ2418 Vertical

屏幕截图 2026-01-27 131303

SQ2820 Vertical

SQ2825 Vertical

屏幕截图 2026-01-27 131511

Dimensions:[mm]

SQ2118,2418,2820,2825V_01

SQ2118,2418,2820,2825V_02

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