167 John Vertente Blvd. New Bedford, MA 02745 Tel: (508) 994-9661 Fax: (508) 995-3000; E-mail: sales@aerovox.com; Website: www.aerovox.com
Aerovox Corp.®
Type RBPS IGBT Snubber Capacitor Modules
Why Use Snubber Capacitors?
With the evolution of power technology, new higher
speed Insulated Gate Bipolar Transistors (IGBTs) make
it possible for high power converters to operate up to 10
kHz or more. IGBTs are replacing the slower Darling-
ton transistors, simplifying circuit design and reducing
cost. IGBT power modules are now being designed
into AC and DC motor drive inverters, uninterruptible
power systems, electric vehicles and alternate energy
production systems.
Power systems containing IGBTs must be designed so
the transient voltages caused by the hi di/dt that occurs
at gate turn off is minimized. Left uncontrolled, this
transient voltage can exceed the blocking voltage rating
of the IGBT and cause it to fail. To reduce the tran-
sient voltage, either di/dt or the parasitic DC bus induc-
tance of the power circuit must be reduced. This is best
achieved by decoupling the parasitic bus inductance us-
ing a non-inductive wound lm capacitor mounted as
near as possible to the IGBT module terminals.
Snubber capacitors, constructed of polypropylene lm
dielectric and dual metallized lm electrodes, are the
optimal capacitor design for IGBT applications. While
lm/foil capacitors are often used because of their su-
perior current carrying capability, they fail in a short
circuit mode, which may cause damage to the IGBT
module. Aerovox’s snubber capacitors combine high
current carrying capability with low inductance, low
dielectric losses and capacitance stability across a wide
frequency range. They offer the self-healing property
of metallized lm (not failing in a short circuit mode)
with the high peak current carrying capability (dv/dt) of
lm/foil construction.
Aerovox’s snubber capacitors, manufactured with poly-
propylene m and dual metallized electrodes, available
with direct IGBT module terminals, radial wire leads,
or a unique printed circuit board dual in-line pin mount,
provide the highest electrical performance of any snub-
ber capacitors currently available.
Ratings
3
RoHS Compliant
Cap Case Irms ESR Max Terminal
Cap Code Code DV/DT Ipeak @ 55 °C @ 100 kHz Codes
(μF) (V/μ sec) (A) (A max) (mΩ)
Voltage Code 63 - 630 Vdc (400 Vac @ 60 Hz)
.33 334 C7 600 200 10.9 9 B,G,I,J
.39 394 C7 600 235 11.5 9 B,G,I,J
.47 474 B7 550 235 12.2 8 B,G,I,J
.56 564 B7 500 280 13.0 8 B,G,I,J
.68 684 A7 450 300 14.0 8 B,G,I,J
.75 754 A7 400 300 15.0 8 B,G,I,J
.82 824 A7 400 330 16.0 8 B,G,I,J
1.00 105 A7 400 400 18.0 7 B,G,I,J
1.20 125 A7 400 480 19.0 7 B,G,I,J
1.50 155 A7 400 600 12.0 7 C,G,I,J
1.75 175 A7 400 700 21.0 7 C,G,I,J
2.00 205 A7 400 800 22.0 7 C,G,I,J
2.20 225 R4 280 615 24.0 7 C,G,H
2.50 255 R4 250 625 26.0 7 C,G,H
3.00 305 R4 250 750 28.0 7 C,G,H
4.00 405 R5 250 1000 30.0 6 D,G,H
5.00 505 R5 250 1250 35.0 6 D,G,H