101
01.10
D
WIMA Snubber MKP
Snubber MKP Capacitors for Pulse Applications with
Double-Sided Metallized Electrodes, Schoopage Contacts
and Internal Series Connection
Special Features Electrical Data
˜ Pulse duty construction
˜ Self-healing
˜ Particularly reliable contact-
configurations: 4-lead versions and
screwable plate connections
˜ Internal series connection from
400 VAC
˜ Very low dissipation factor
˜ Negative capacitance change
versus temperature
˜ According to RoHS 2002/95/EC
Typical Applications
For high pulse and high frequency
applications requiring extremely
reliable contacts e.g.
˜ IGBT-applications
Construction
Dielectric:
Polypropylene (PP) film
Capacitor electrodes:
Double-sided metallized plastic film
Internal construction:
Snubber MKP: 180 VAC, 250 VAC
Snubber MKP: 400 VAC to 700 VAC
Plastic film
Metal contact layer
(schoopage)
Terminating plate
Electrode carrier
plastic film metallized
on both sides
Plastic film
Metal contact layer
(schoopage)
Terminating plate
Electrode carrier
plastic film metallized
on both sides
Plastic film metallized
on one side
Encapsulation:
Solvent-resistant, flame-retardant plastic
case with epoxy resin seal, UL 94 V-0
Terminations:
Tinned wire or plates.
Marking:
Colour: Red. Marking: Black.
Epoxy resin seal: Red
Mounting Recommendation
Excessive mechanical strain, e.g. pressure
or shock onto the capacitor body, is to be
avoided during mounting and usage of
the capacitors. When fixing the plates the
screw torque is to be limited to max. 5 Nm.
For further details and graphs please
refer to Technical Information.
Packing
Transportation-safe packing in
cardboard boxes.
Packing units
L pcs. per packing unit
18 100
26.5 100
31.5 100
41.5 100
56 50
Capacitance range:
0.047 mF to 25 mF
Rated voltages:
250 VDC, 400 VDC, 630 VDC, 1000 VDC,
1600 VDC, 2000 VDC, 3000 VDC
Capacitance tolerances:
±20%, ±10%, ±5% (other tolerances are
available subject to special enquiry)
Operating temperature range:
–55) C to +100) C
Climatic test category:
55/100/56 in accordance with IEC
Insulation resistance at +20+ C:
C T 0.33 mF: 1 x 105 M¸
(mean value: 5 x 105 M¸)
C 0.33 mF: 30 000 sec (M¸ x mF)
(mean value: 100 000 sec)
Measuring voltage: 100 V/1 min.
Test voltage:
L P 41.5: 1.6 Ur, 2 sec
L 41.5: 1.4 Ur, 2 sec
L 56 : 1.2 Ur, 2 sec
Dissipation factors at + 20) C: tan d
at f C T 0.1 mF 0.1 mF < C T 1.0 mF C > 1.0 mF
1 kHz T 3 x 10-4 T 3 x 10-4 T 3 x 10-4
10 kHz T 4 x 10-4 T 6 x 10-4 –
100 kHz T 15 x 10-4 – –
Maximum pulse rise time:
Capacitance max. pulse rise time V/msec at TA < 40) C
mF
250 VDC 400 VDC 630 VDC 1000 VDC 1600 VDC 2000 VDC 3000 VDC
0.047 ... 0.22 500 500 900 1400 1400 1400 1400
0.33 ... 0.68 300 400 700 900 900 900 900
1.0 ... 2.2 200 200 400 400 500 500 500
2.5 ... 6.0 80 100 150 300 400 – –
7.0 ... 10 50 70 75 – – – –
15 ... 25 10 20 – – – – –
for pulses equal to the rated voltage
Voltage derating:
A voltage derating factor of 1.35 % per K
must be applied from +85+ C for DC
voltages and from +75+ C for AC
voltages
Reliability:
Operational life 300 000 hours
Failure rate P 1 fit (0.5 x Ur and 40) C)
Specific dissipation:
Box size* Specific dissipation in Watts per K
W x H x L in mm above the ambient temperature
19 x 31 x 56 0.068
23 x 34 x 56 0.079
27 x 37.5 x 56 0.092
33 x 48 x 56 0.122
37 x 54 x 56 0.142
* other box sizes see page 12.