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A 1940 Radio Shack catalog listed every capacitor's rating in "Mfd.", from 0.000005 Mfd. (5 pF) to 50 Mfd. (50 μF). [ 16 ] "Micromicrofarad" or "micro-microfarad" is an obsolete unit found in some older texts and labels, contains a nonstandard metric double prefix .
Capacitors for AC applications are primarily film capacitors, metallized paper capacitors, ceramic capacitors and bipolar electrolytic capacitors. The rated AC load for an AC capacitor is the maximum sinusoidal effective AC current (rms) which may be applied continuously to a capacitor within the specified temperature range.
In electrical engineering, a capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other.
If a lifetime specification of an electrolytic capacitor is, for example, 2000 h/105 °C, the capacitor's lifetime at 45 °C can be ”calculated” as 128,000 hours—that is roughly 15 years—by using the 10-degrees-rule.
A capacitor with the following text on its body: 105K 330V has a capacitance of 10 × 10 5 pF = 1 μF (K = ±10%) with a working voltage of 330 V. A capacitor with the following text: 473M 100V has a capacitance of 47 × 10 3 pF = 47 nF (M = ±20%) with a working voltage of 100 V.
15 cm SK L/45 mounts [1] Type of mount Designation Weight Elevation Range (during World War I) Ship classes Single pedestal mounts in casemates: MPL C/06: 15,770 kg (34,770 lb) −7° to +20° 14.9 km (9.3 mi) at 20° Nassau, Helgoland, and Kaiser classes, SMS Von der Tann, Moltke class, SMS Blücher: MPL C/06.11: 16,533 kg (36,449 lb) −10 ...