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1356-PQ3535-2S(7+7) High-FrequencyTransformers

PQ3535 7+7 High-Frequency Transformer for Industrial & Communication Power | Custom Multi-Winding Transformer

Application Scenarios: They are extensively integrated into switch-mode power supplies (SMPS), DC-DC converters, PFC (Power Factor Correction) circuits and industrial automation equipment that demand high power density and reliable isolation performance.

The PQ3535 boasts core advantages of high-frequency low-loss performance, compact structure with excellent heat dissipation, flexible design, and manufacturing-friendly features. The PQ-type core features flat top and bottom surfaces, facilitating surface mounting and efficient heat dissipation, while the dual-slot bobbin helps reduce leakage inductance and EMI. With a wide selection of Al values and air gaps available, it is compatible with various topologies including forward, flyback, half-bridge, and full-bridge configurations. Moreover, its standardized bobbin and pin layout supports automated winding, varnish dipping, and insertion processes, ensuring consistent mass production quality. Its typical applications span a wide range of fields, such as industrial switching power supplies, server/communication power supplies, LED drivers, adapters, automotive power supplies, and auxiliary power supplies for photovoltaic inverters.

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Product Description

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Product Overview

The 1356-PQ3535-2S (7+7) is a high-frequency transformer based on the PQ3535 core platform, designed for industrial and communication power applications. It features a 7+7 through-hole pin configuration that supports complex multi-winding designs and flexible output requirements.

The dual-slot bobbin design facilitates optimized winding arrangement, helping to control leakage inductance and improve EMI performance. It also ensures stable performance and consistent quality in automated mass production.

This transformer can be customized for various power topologies, including forward, flyback, half-bridge, and full-bridge designs, depending on circuit requirements.

Core Advantages

Dual-slot bobbin design facilitating optimized winding layout and better leakage inductance control
supporting complex multi-winding and multi-output designs
Compact PQ core structure with good thermal management capability for high-power applications
Standardized structure supporting automated winding and assembly for consistent mass production quality
Customizable electrical parameters including inductance, turns ratio, and winding structure
Suitable for industrial and communication power systems requiring high reliability

Typical Applications

Industrial switching power supplies
Server and data center power systems
Telecommunication power modules
Photovoltaic inverter auxiliary power supplies
DC-DC power converters
Industrial automation control power systems
Energy storage system power conversion

Technical Specifications

屏幕截图 2025-10-31 132304

Structural Drawing

屏幕截图 2025-10-31 132342

FAQ

Q: What is the advantage of the dual-slot bobbin design?
A: It facilitates optimized winding arrangement, helping to control leakage inductance and improve EMI performance.

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