https://ocenmepower.com/knowledge/ Technical reference on CNC machining tolerances, cost drivers, materials and design for manufacturability. en Sun, 15 Nov 2026 09:28:03 GMT https://ocenmepower.com/knowledge/how-to-choose-a-power-semiconductor-supplier-in-china/ https://ocenmepower.com/knowledge/how-to-choose-a-power-semiconductor-supplier-in-china/ A five-point audit for buying power semiconductors from China - die source, packaging capacity, reliability evidence, engineering support, change control. Sourcing Sun, 15 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/rds-on-vs-gate-charge-which-sets-your-loss/ https://ocenmepower.com/knowledge/rds-on-vs-gate-charge-which-sets-your-loss/ Conduction loss scales with RDS(on), switching loss with gate charge and frequency. A 48 V, 20 A buck stage crosses from one to the other near 100 kHz. Selection Sun, 15 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/what-is-a-power-mosfet/ https://ocenmepower.com/knowledge/what-is-a-power-mosfet/ A power MOSFET is a voltage-controlled switch for currents above 1 A. How the structure works, what RDS(on) costs, and which voltage class fits which circuit. Fundamentals Sat, 14 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/what-drives-the-price-of-a-power-mosfet/ https://ocenmepower.com/knowledge/what-drives-the-price-of-a-power-mosfet/ Die area, voltage class, package and test level set a power MOSFET price before anything else. Why two similar 650 V parts can differ threefold in cost. Sourcing Sat, 14 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/how-to-read-a-mosfet-datasheet/ https://ocenmepower.com/knowledge/how-to-read-a-mosfet-datasheet/ The six numbers that decide whether a MOSFET works in your circuit, and four ways datasheets flatter a part: conditions, temperature, sampling and axes. Selection Fri, 13 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/mosfet-igbt-or-sic-which-switch/ https://ocenmepower.com/knowledge/mosfet-igbt-or-sic-which-switch/ A decision guide by voltage, current and frequency, with the crossover points where each technology wins and the losses that decide them. Comparison Thu, 12 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/super-junction-vs-planar-mosfet/ https://ocenmepower.com/knowledge/super-junction-vs-planar-mosfet/ Super junction MOSFETs cut on-resistance by 3–5×, but their non-linear Coss and sharp edge change EMI, light-load efficiency and avalanche behaviour. Comparison Wed, 11 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/sic-schottky-diode-vs-fast-recovery-diode/ https://ocenmepower.com/knowledge/sic-schottky-diode-vs-fast-recovery-diode/ SiC Schottky diodes remove reverse recovery but leak more and cost more. Where the crossover sits, and why below 20 kHz a silicon FRD is usually the better buy. Comparison Tue, 10 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/why-power-supplies-fail-in-the-field/ https://ocenmepower.com/knowledge/why-power-supplies-fail-in-the-field/ Most field failures trace to six causes, none of them the device headline rating. What to test, and what evidence to demand from a supplier. Reliability Mon, 09 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/how-to-qualify-a-second-source-part/ https://ocenmepower.com/knowledge/how-to-qualify-a-second-source-part/ A six-step second-source process: define the envelope, compare at matched conditions, verify on a batch, stress it, document it, then keep watch. Sourcing Sun, 08 Nov 2026 00:00:00 GMT https://ocenmepower.com/knowledge/htrb-and-h3trb-explained/ https://ocenmepower.com/knowledge/htrb-and-h3trb-explained/ Both stress a device at high temperature with reverse bias. The humidity is the difference, and it is the difference between a dry failure mode and a wet one. Reliability Sat, 07 Nov 2026 00:00:00 GMT