How to Write a Custom Transformer Specification That Suppliers Actually Understand

Learn to write transformer RFQs that get accurate quotes. Covers core selection, winding specs, insulation class, and testing requirements.

Jun 15, 2026
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PoE Transformer Selection Guide

PoE Transformer Selection Guide: How to Choose the Right Magnetics for Your PoE Design

Learn how to select the right PoE transformer for your design. Covers IEEE 802.3af/at/bt power levels, flyback vs forward topology, core saturation, thermal management, and key parameters like DCR, turns ratio, and isolation voltage.

Jun 2, 2026
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Professional-surface-mount-PoE-transformers-integrated-into-a-high-speed-network-switch-PCB-next-to-RJ45-ports

A Comprehensive Guide to PoE Transformers: Design, Impact, and Strategic Solutions

This comprehensive guide explores PoE transformers (Power over Ethernet), essential components for delivering both data and DC power over a single cable. We analyze the shift toward high-power IEEE 802.3bt (PoE++) standards, address critical thermal management and magnetic saturation challenges, and provide manufacturer-level solutions for robust network device design.

May 26, 2026
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Why Nanocrystalline Cores Are Rarely Used in High-Frequency Transformers

Why Nanocrystalline Cores Are Rarely Used in High-Frequency Transformers

In the world of magnetic core materials, nanocrystalline cores are often praised for their high saturation flux density, excellent temperature stability, and low core loss—especially in medium to low-frequency power conversion applications. However, when it comes to high-frequency transformers, particularly those operating above 100 kHz, nanocrystalline materials are rarely the first choice. So, why are nanocrystalline cores seldom used in high-frequency transformers? This article explores the material’s physical limitations, design challenges, and cost-performance considerations in detail.

May 18, 2026
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Transformer Core Temperature Characteristics Explained | High-Frequency Core Selection Guide

Understanding the Temperature Characteristics of Transformer Cores: Performance, Impacts, and Selection Guide

Unveiling the Secrets of Core Materials

May 13, 2026
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Microscopic view of a dangerous pinhole defect in the insulation layer of enameled copper magnet wire.

Enameled Wire Pinhole Test: The First Line of Defense for Transformer Reliability

This technical guide details the enameled wire pinhole test, a critical quality control measure for transformer manufacturing. We explain how high-voltage salt-water immersion detects microscopic insulation defects, preventing premature field failures and ensuring compliance with stringent environmental reliability standards, such as the rigorous Double 85 experiment.

Apr 27, 2026
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