Over time (typically after 5-8 years of 24/7 operation), the dielectric material degrades. A healthy VEC-643 will read within 10% of its rated value. A failed unit will show a 20-40% drop in capacitance, leading to massive voltage ripple.
One of the biggest challenges with part numbers like VEC-643 is obsolescence. If you cannot find the original manufacturer, use this cross-reference data to find substitutes. VEC-643
Why the latest iteration of the VEC series is changing the game for system integrators. Over time (typically after 5-8 years of 24/7