Updated: November 13, 2026 Repairing a power supply is not a parts-drawer exercise; it is a sequence, and the sequence starts with safety. The order of actions — discharge, isolate, limit, test — is what separates a safe repair from a dangerous one and a quick diagnosis from a parts swap that fails again. This … Read more
A rectifier-based power stage fails in the field for a small set of reasons, and the reasons are nearly all visible before the board ships. The ten-check audit turns that knowledge into a release gate: ten questions, each with a pass criterion and a trace to the design method that answers it. This article presents … Read more
A single source is one fire away from stopping the line. A fire, a strike, a trade restriction, or a supplier’s own quality problem can all take a sole-sourced part off the market, and the board stops shipping with it. Second-sourcing turns that risk into a qualification flow: a defined set of gates that prove … Read more
Updated: October 28, 2026 This page is a focused engineering note in the sourcing compliance cluster—use the checklists and links below to finish selection, not as a substitute for the datasheet. Topic hub: Avoiding counterfeit power semiconductors. Related deep-dives sit in the continue list at the end. Before release Pass criteria Ratings vs mission profile … Read more
A counterfeit semiconductor is usually bought for a reason that sounds sensible — a price below the market, a part in stock when nobody else has it — and the counterfeit is revealed by clues that are visible before the part ever powers up. The price gap, the packaging inconsistencies, and the electrical data all … Read more
Updated: October 28, 2026 The 1N4002G is a general-purpose silicon rectifier with a 1 A average-current rating and a 100 V repetitive reverse-voltage rating. Its axial leads suit through-hole circuits. It can rectify low-frequency AC, but the manufacturer matters: the suffix, forward drop and other specifications must come from the data sheet for the actual … Read more
Updated: October 28, 2026 The 1F3G is discussed as a fast-recovery rectifier class part: silicon diode behavior with a reverse-recovery time aimed at higher frequencies than a 1N400x, while still needing datasheet confirmation for the exact vendor PDF. Where is the original 1F3G data sheet? Use the document for the manufacturer of your device. The … Read more
Send the topology, current and voltage class. Good-Ark sales and application engineering will confirm the closest device, package and qualification status.