NOTICE: Specifications are subject to change without notice. Contact your nearest AVX Sales Office for the latest specifications. All statements, information and
data given herein are believed to be accurate and reliable, but are presented without guarantee, warranty, or responsibility of any kind, expressed or implied.
Statements or suggestions concerning possible use of our products are made without representation or warranty that any such use is free of patent infringement
and are not recommendations to infringe any patent. The user should not assume that all safety measures are indicated or that other measures may not be required.
Specifications are typical and may not apply to all applications.
BestCap Ultra-low ESR
High Power Pulse Supercapacitors
®
INTRODUCING
BESTCAP
®
: A NEW GENERATION OF PULSE SUPERCAPACITORS
Supercapacitors (also referred to as Electrochemical
Capacitors or Double Layer Capacitors) have rapidly become
recognized, not only as an excellent compromise between
“electronic” or “dielectric” capacitors such as ceramic,
tantalum, film and aluminum electrolytic, and batteries (Figure
1), but also as a valuable technology for providing a unique
combination of characteristics, particularly very high energy,
power and capacitance densities.
There are, however, two limitations associated with
conventional supercapacitors, namely: high ESR in the tens
of Ohms range, and high capacitance loss when required to
supply very short duration current pulses. BestCap
®
successfully addresses both of these limitations.
The capacitance loss in the millisecond region is caused by
the charge transfer (i.e. establishment of capacitance) being
carried out primarily by relatively slow moving ions in double
layer capacitors.
Figure 1. Specific Energy of Capacitor Types
10000
SPECIFIC ENERGY
1000
Specific Energy (mFV/cc)
®
100
UM
AL
NT
TA
ER IC
T
YM
OL ROLY M
P T
C MINU
E
EL LU
A
ELECTROLYTIC
CAPACITOR
10
0.1
1
10
100
1000
1
10000
Capacitance (mF)
In the above-mentioned “electronic” capacitors, the charge
transfer is performed by fast electrons, thereby creating
virtually instant rated capacitance value. In the BestCap
®
, a
unique proton polymer membrane is used – charge transfer
by protons is close to the transfer rate for electrons and
orders of magnitude greater than organic molecules. Figure
2 below illustrates the severe capacitance loss experienced
by several varieties of supercapacitors under short pulse
width conditions. It can also be seen from Figure 2 how well
BestCap
®
retains its capacitance with reducing pulse widths.
For comparison purposes, the characteristic of an equivalent
capacitance value aluminum electrolytic capacitor is shown
in Figure 2. The electrolytic capacitor is many times the vol-
ume of the BestCap
®
.
Figure 2. Actual Capacitance vs. Pulse Width
Actual Cap. (% of Nominal)
100%
80%
®
EDLC-Electrochemical
double layer capacitor
Aluminum Electrolytic Capacitor
manufacturer A EDLC
manufacturer B EDLC
manufacturer C EDLC
60%
40%
20%
0%
1000
100
Pulse Width (msec)
10
1
2
BestCap Ultra-low ESR
High Power Pulse Supercapacitors
®
BESTCAP
®
– A SERIES – MAXIMUM CAPACITANCE, LOW ESR
B SERIES – LOW PROFILE, LOW ESR
The BestCap
®
is a low profile device available in four case sizes. Capacitance range is from 6.8mF to 1000mF and includes 7
voltage ratings from 3.6V to 16V.
BESTCAP
®
– AVAILABLE LEAD CONFIGURATIONS
STANDARD:
N-Style: Two Terminal Planar Mount
(Available in BZ01, BZ05, BZ09 case only)
S-Style: Three Terminal Planar Mount
(Available in BZ01, BZ05, BZ09 case only)
L-Style: Four Terminal Planar Mount
(Available in BZ01 and BZ02 case only)
A Style: Through-Hole Mount
(Available in BZ01, BZ02 case only)
H-Style: Extended Stand-Off Through Hole Mount
(Available in BZ01, BZ02 case only)
W-Style: Wire Lead Mount
(Available in BZ01, BZ05 case only)
BODY DIMENSIONS
Case Size
BZ01
BZ02
BZ05
BZ09
L ±0.5 (0.020)
mm (inches)
28 (1.102)
48 (1.890)
20 (0.787)
17 (0.669)
W ±0.2 (0.008)
mm (inches)
17 (0.669)
30 (1.181)
15 (0.590)
15 (0.590)
H nom
mm (inches)
2.3 (0.091) – 6.5 (0.256)
2.9 (0.114) – 6.8 (0.268)
2.3 (0.091) – 6.5 (0.256)
2.3 (0.091)
LEAD-FREE COMPATIBLE
COMPONENT
ELECTRICAL SPECIFICATIONS
Capacitance range:
Capacitance tolerance:
Voltage ratings (max):
Test voltages:
Surge test voltage:
Temperature range:
Full dimensional specifications shown in section (2)
6.8mF – 1000mF
+80% / –20%
3.6V
4.5V
5.5V
9V
12V
15V
16V
3.5V
4.2V
5.0V
8.4V
10.0V 11.0V 13.0V
4.5V
5.6V
6.9V 11.3V 15.0V 18.8V 20.0V
–20°C to 70°C, consult factory for -40ºC and +75ºC options
20V
16.0V
25.0V
HOW TO ORDER
BZ
BestCap
®
(See Detailed Electrical Specifications for valid combinations)
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