BZ025A404ZAB AVX Corporation, BZ025A404ZAB Datasheet - Page 23
![CAP .40F 5.5V CARBON](/photos/25/85/258526/4466124_sml.jpg)
BZ025A404ZAB
Manufacturer Part Number
BZ025A404ZAB
Description
CAP .40F 5.5V CARBON
Manufacturer
AVX Corporation
Series
BestCap® BZr
Datasheet
1.BZ015B303ZSB.pdf
(26 pages)
Specifications of BZ025A404ZAB
Capacitance
400mF
Voltage - Rated
5.5V
Height
0.264" (6.70mm)
Size / Dimension
1.890" L x 1.181" W (48.00mm x 30.00mm)
Operating Temperature
-20°C ~ 70°C
Tolerance
-20%, +80%
Esr (equivalent Series Resistance)
35.0 mOhm
Lifetime @ Temp.
1000 Hrs @ 70°C
Mounting Type
Through Hole
Package / Case
4 Lead BZ02
Capacitance Tolerance
+80, -20%
Voltage Rating
5.5VDC
Esr
0.035ohm
No. Of Pins
4
Capacitor Mounting
SMD
Operating Temperature Range
-20°C To +70°C
Dimensions
30 mm W x 48 mm L
Leakage Current
40 uAmps
Product
Super Capacitors
Voltage Rating Vdc
5.5V
Rohs Compliant
Yes
External Depth
2.1mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Spacing
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
478-6275
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BZ025A404ZAB
Manufacturer:
AVX Corporation
Quantity:
135
4.4 BESTCAP FOR GSM/GPRS PCMCIA
MODEMS
There is an increasing usage of PCMCIA modem cards for
wireless LAN and WAN (Wide Area Network) applications.
The PCMCIA card is used as an accessory to Laptops and
PDA’s, and enables wide area mobile Internet access,
including all associated applications like Email and file
transfer.
With the wide spread use of GSM networks, a PCMCIA
GSM modem is a commonly used solution. To achieve
higher speed data rates, GSM networks are now being
upgraded to support the GPRS standard.
The design challenge:
GSM/GPRS transmission requires a current of approximate-
ly 2A for the pulse duration. The PCMCIA bus cannot supply
this amount of pulsed current. Therefore, there is a need for
a relatively large capacitance to bridge the gap.
The capacitor supplies the pulse current to the transmitter,
and is charged by a low current during the interval between
pulses.
22
BestCap
High Power Pulse Supercapacitors
V
PCMCIA bus
+
from
Current
Voltage
2 Ampere
Capacitor
®
Ultra-low ESR
Transmitter
* V=V
THE SOLUTION:
It is assumed that during the pulse, 0.5A is delivered by the
battery, and 1.5A by the capacitor.
Conclusion: High capacitance is needed to minimize voltage
drop. A high value capacitance, even with a higher ESR,
results in a lower voltage drop. Low voltage drop minimizes
the conductive and emitted electro magnetic interference,
and increases transmitter output power and efficiency.
Voltage After Pulse (V)
Operating Voltage (V)
Rated Capacitance
@ 0.5msec Pulse
Cutoff Voltage (V)
Voltage Drop* (V)
(25% duty cycle)
V
Capacitance
GPRS Pulse
(milli Farad)
(milli Farad)
1
(milli ohm)
Pass/FAIL
Size (mm)
+V
ESR
2
=1.5A*ESR + (1.5A*1.154msec)/C
Chip Tantalum
SOLUTION A
.4 x 7 x 2
0.804V
2.896
FAIL
2.2
2.2
3.7
3.1
50
}
}
V
V
BZ154B473ZSB
SOLUTION B
1
2
20 x 15 x 2.1
BestCap
= I*ESR
= I* t/C
0.268V
3.432
PASS
160
3.7
3.1
t
47
30
®