EPCOS Product Brief 2013
Aluminum Electrolytic Capacitors
Industrial Snap-in Series with Top Class Performance
A new series of EPCOS
snap-in aluminum electrolytic capacitors is optimized to
fulfill the requirements of DC
link applications in frequency
converters and professional
power supplies with very high
ripple current loads. The broad
spectrum of types for the 85 °C
and 105 °C temperature ranges
also includes versions that are
designed specifically for heat
sink mounting.
www.epcos.com
Benefits
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Significantly reduced ESR
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Extremely low inner thermal
resistance
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Outstanding
ripple current
capability at operating
conditions, especially at high
frequencies
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Low cost per ampere of
ripple current
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Reduced size and cost of
capacitor banks based on the
ripple current capability
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RoHS compatible
Industrial Snap-in Series
with Top Class Performance
Technical information
Capacitors heat up when a ripple current IAC is applied to them. As the model below shows the ESR and the thermal resistance Rth are the main factors influencing the resulting hotspot temperature THS. A low ESR and a low inner
thermal resistance between the winding and the base of the capacitor therefore are necessary in order to operate
the capacitors at a high maximum ripple current and a constant ambient temperature Ta without exceeding a maximum THS value.
Thermal model of aluminum electrolytic capacitors
Ta
THS = PV · R th + Ta
R tha
2
TBottom
PV = I AC · ESR
R thi
THS = (I AC · ESR) · R th + Ta
2
THS
R th = R thi + R tha
Thanks to the carefully selected materials and an intelligent winding design all capacitors in the industrial series
exhibit a very low ESR (up to 40% lower) at operating conditions between 60 °C and 85 °C. The thermal resistance is also significantly lower (by about 50%) than that of standard capacitors, which results in higher ripple
current capabilities, especially at high frequencies as demonstrated for the B43544 (105 °C) industrial series in the
diagram below. For example, the permissible ripple current IAC of a 470 µF/400 V capacitor in a 30 × 45 mm can
(B43544A9477M) is 72% higher at 10000 Hz than at 100 Hz (curve a).
Permissible ripple current IAC as a factor of frequency f
Thus, the industrial snap-in series offer up to +45% more ripple-current capability than comparable multi-purpose
series at typical operating conditions.
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For further information please contact your EPCOS sales office.
© EPCOS AG 2013
Industrial Snap-in Series
with Top Class Performance
Performance benchmark
Snap-in series, +85 °C; best performance at typical operating temperatures of around +60 °C
Multi-purpose series
Industrial series
B43601
B43540
Features
Ultra compact
Compact, industrial design, outstanding ripple current
capability
10000 h (+85 °C, IR, VR)
10000 h (+85 °C, IR, VR)
Example
560 µF / 450 V
560 µF / 450 V
Dimensions
d×l
35 × 45 mm
35 × 55 mm
vs. B43601
Rated ripple
2.81 A
current
100 Hz, +85 °C
3.50 A
+25%
Max. ripple
6.58 A
current
300 Hz, +60 °C
8.73 A
+33%
ESR
60 mΩ
300 Hz, +60 °C
50 mΩ
–17%
Snap-in series, +105 °C; high ripple current capability at demanding ambient temperatures
Features
Multi-purpose series
Industrial series
B43508
B43544
B43644
Ultra compact
B43545
B43547
Compact, industrial design, outstanding ripple current capability
3000 h
5000 h
3000 h
(+105 °C, IR, VR) (+105 °C, IR, VR) (+105 °C, IR, VR)
5000 h
(+105 °C, IR, VR)
8000 h
(+105 °C, IR, VR)
Example
470 µF / 450 V
470 µF / 450 V
470 µF / 450 V
470 µF / 450 V
470 µF / 450 V
Dimensions
d×l
35 × 40 mm
35 × 40 mm
35 × 45 mm
35 × 50 mm
35 × 50 mm
vs. B43508
vs. B43644
1.85 A
Rated ripple
current
100 Hz, +105 °C
2.07 A
2.47 A
+34%
2.72 A
+31%
2.79 A
Max. ripple
4.53 A
current
300 Hz, +85 °C
4.38 A
5.99 A
+32%
6.37 A
+45%
6.67 A
ESR
65 mΩ
300 Hz, +85 °C
65 mΩ
45 mΩ
–31%
40 mΩ
–38%
40 mΩ
Product range industrial snap-in series
B43540
B43541
B43544
B43545
B43547
Useful lifetime
at rated conditions
10000 h
(+85 °C, IR, VR)
5000 h
(+85 °C, IR, VR)
3000 h
(+105 °C, IR, VR)
5000 h
(+105 °C, IR, VR)
8000 h
(+105 °C, IR, VR)
Voltage VR
200 … 450 V DC
550 … 600 V DC
200 … 550 V DC
400 … 450 V DC
200 … 450 V DC
Rated capacitance CR
68 … 2200 µF
47 … 390 µF
47 … 2700 µF
82 … 820 µF
82 … 2200 µF
Dimensions
d×l
25 × 25 …
35 × 55 mm
25 × 25 …
35 × 55 mm
25 × 25 …
35 × 55 mm
25 × 25 …
35 × 55 mm
25 × 25 …
35 × 55 mm
© EPCOS AG 2013
For further information please contact your EPCOS sales office.
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Industrial Snap-in Series
with Top Class Performance
Base-cooling for snap-in capacitors
For frequency converters and power supplies with heat sinks
Reduced overall length
tolerance (±0.2 mm)
for effective heat sink
mounting of
capacitor banks
Heat sink
Suited for use of
thin thermal pads
Comparison of cooling concepts
Ordering code
Standard design
Base-cooling design
B43544B9337M000
On request
Voltage VR
400 V DC
Rated capacitance CR
330 µF
Rated ripple current IAC,R
100 Hz, Ta = +105 °C
1.77 A
(passive cooling)
Useful life
3000 h
Ripple current IAC,max
100 Hz, Ta = +70 °C
1.97 A
2.57 A
Forced air cooling
(v = 1 m/s)
5.41 A
Heat sink, 2 mm thermal pad
(Theat sink = +55 °C)
Useful life
40000 h
40000 h
40000 h
Highlights
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Outstanding ripple current
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Very long useful life
capability
The base-cooling feature is available on request for all
industrial series (B43540, B43541, B43544, B43545
and B43547). These capacitors feature a reinforced can
with long-term rigidity. PET is used as the standard
insulation material. Optionally, the snap-in capacitors
can be delivered with a mounted thermal pad.
Structure of ordering codes: The ordering code for one and the same product can be represented differently in data sheets, data books, other publications and the website of EPCOS, or in
order-related documents such as shipping notes, order confirmations and product labels. The varying representations of the ordering codes are due to different processes employed and
do not affect the specifications of the respective products. Detailed information can be found on the Internet under www.epcos.com/orderingcodes.
Important information: Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on
our knowledge of typical requirements that are often placed on our products. We expressly point out that these statements cannot be regarded as binding statements about the
suitability of our products for a particular customer application. It is incumbent on the customer to check and decide whether a product is suitable for use in a particular application.
This publication is only a brief product survey which may be changed from time to time. Our products are described in detail in our data sheets. The Important notes
(www.epcos.com/ImportantNotes) and the product-specific Cautions and warnings must be observed. All relevant information is available through our sales offices.
© EPCOS AG · A Member of TDK-EPC Corporation
Edition 10/2013 · Ordering No. EPC:27028-7600 · Printed in Germany · PB 10132.