WIMA's MKS 4 capacitors are produced with the proven box technology using solvent-resistant and flame-retardant plastic cases according to UL 94 V-0. The advantage of this method of construction, besides the improved mechanical stability of the component on the board, is the excellent electrical contact reliability.
In the case of metallized capacitors, thin layers of aluminum (approximately 0.03 µm) are vacuum-deposited on the insulating film as conducting electrodes. In the case of a breakdown, the short-circuit current causes the thin metal coating to evaporate around the point of failure and an insulating area is formed. The capacitor remains intact (self-healing). Due to their construction principle, metallized capacitors stand out for their very favorable capacitance/volume ratio.
By making use of ultra-thin film and appropriate manufacturing experience, it has been possible to achieve high capacitance values in very small box sizes.
1000 pF to 220 µF (E12-values on request)
50 VDC, 63VDC, 100VDC, 250VDC, 400VDC, 630VDC, 1000VDC, 1500VDC, 2000VDC
±20%, ±10%, ±5%
Operating temperature range:
Ur = 50 VDC: -55°C to +100°C
Ur > 63 VDC: -55°C to +125°C
In accordance with IEC 60384-2
Climatic test category:
55/100/56 in accordance with IEC
Insulation resistance at +20°C:
|Test voltage: 1.6 Ur, 2 sec
A voltage derating factor of 1.25% per K must be applied from +85°C for DC voltages and from +75°C for AC voltages.
Operational life > 300000 hours (+125°C permitted for 1000 hours max. distributed over the entire operating life)
Failure rate < 2 fit (0.5 x Ur and 40°C)
|Measuring time: 1 min.
Dissipation factors at +20°C: tan
|Maximum pulse rise time: for pulses equal to the rated voltage.|
|Pull test on pins:
d < 0.8 Ø: 10 N in direction of pins
d > 0.8 Ø: 20 N in direction of pins
according to IEC 60068-2-21
6 hours at 10...2000 Hz and 0.75mm displacement amplitude or 10g in accordance with IEC 60068-2-6
Low air density:
1kPa = 10 mbar in accordance with IEC 60068-2-13
4000 bumps at 390 m/sec2 in accordance with IEC 60068-2-29