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Frame Core Chokes SQ2118 Horizontal Series

Frame Core Chokes SQ2118/2418/2820/2825 Horizontal

Smart Thermal Control and Wide Temperature Range Stability
Smart thermal control ensures that the SQ High Frequency Transformers maintain optimal performance across a wide operating temperature range of -40°C to +150°C, making them reliable in extreme conditions.
The inductance fluctuation is kept below 5%, ensuring stable operation in current transformers even in high or low-temperature industrial environments.

Low Loss and EMC Optimization
The high-frequency loss of the ferrite material used in the SQ series is below 200mW/cm³ at 100kHz, ensuring minimal energy loss and long-term performance in current transformers and high frequency transformers.
Integrated magnetic shielding and sandwich winding methods reduce radiation noise to less than 30dBμV/m (EN 55032 Class B), ensuring compliance with EMC standards and optimized operation in current transformers and high-frequency transformers.

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Model:
SQ2118/2418/2820/2825 Horizontal
Brand:
INF

Frame Core Chokes SQ2118/2418/2820/2825 Horizontal 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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Applications

• Switching Mode Power Supplies (SMPS)
• LED Driver Power Supplies
• AC Power Line EMI Filters
• Industrial Power Equipment
• Home Appliance Power Systems
• Solar Inverters and Charging Equipment

Minimum Order Quantity (MOQ)

Prototype / Sample Orders:
Orders starting from 1 piece are accepted. Free sampling and customization services are available, with up to 5 free samples provided (shipping cost to be paid by the customer).

Bulk Orders:
Discounted pricing is available for orders of 5,000 pieces or more.

Parameter	Specification/Range
Inductance	1mH - 10mH (customizable with ±10% accuracy)
Operating Frequency	20kHz - 1MHz
Power Capacity	200W - 1.5kW (natural/forced cooling)
Insulation Withstand Voltage	Primary - secondary 4kV AC (1 minute)
Temperature Rise Limit	≤40°C (full load, natural cooling)
Package Form	DIP/SMD optional, automated pick-and-place

Model Comparison Table

Test Condition:1KHz/0.3V AT(25℃)

Specifications and Electrical Characteristics

SQ2118 Horizontal

INF Code	Inductance	Wire Diameter	Turns	DC Resistance	Applicable Enameled Wire Diameter	Operating Current	Applicable Power
SQ2118-7mH	7mH	0.3*1.5	37	80mΩ MAX	0.75	3.15～4.05A	150～360W
SQ2118-10mH	10mH	0.25*1.5	42	100mΩ MAX	0.57	2.62～3.75A	150～340W
SQ2118-10mH	10mH	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