ERU chokes
ERU 25, helically wound
Series/Type:
Date:
B82559*A025
February 2016
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EPCOS AG 2016. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS’ prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
ERU chokes
Helically wound
Rated inductance 0.44 .... 20 µH
Saturation current 15 ... 71 A
Construction
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■
■
■
■
B82559*A025
ERU 25
High temperature ferrite core
Magnetically shielded
Helical winding
Self-leaded construction
Under body termination
Features
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■
■
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■
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High rated current
Extremely low DC resistance
Very low profile and extremely small footprint
Suitable for pick-and-place processes
RoHS-compatible
Easily customized
Applications
Energy storage chokes for
■
DC/DC converters
■
VRM modules
■
POL converters
■
Solar converters
Terminals
Lead-free tinned
Marking
Manufacturer, ordering code, date of manufacture and
production place (YYWWD/X),
Delivery mode and packing units
■
Tray
■
Blister tape on request
Please read
Cautions and warnings
and
Important notes
at the end of this document.
2
02/16
ERU chokes
Helically wound
Dimensional drawing and layout recommendation
B82559*A025
ERU 25
Dimensions in mm
Packing (tray)
Dimensions in mm
Height (mm)
component h tray H
9.6
11.1
12.8
14.6
19
21
23
23
Packing unit
per tray per box
40
40
40
40
280
280
240
240
Please read
Cautions and warnings
and
Important notes
at the end of this document.
3
02/16
ERU chokes
Helically wound
Technical data and measuring conditions
Rated inductance L
R
Inductance tolerance
Saturation current I
Sat
DC resistance R
DC
Self-resonant frequency
High voltage: N1 - core
Solderability
(test of wettability of the pins)
Resistance to soldering heat
Operating temperature
Storage conditions (packaged)
Measured at 10 kHz, 0.1 V, +25 °C
7%
B82559*A025
ERU 25
Current that will result in an approximately 10% drop in
the inductance values at the specified temperature
Measured at +25 °C
2 MHz
200 V DC, 1 s
(245 5) °C, (3 0.3) s,
wetting of soldering area 95%
(based on IEC 60068-2-58, solder bath method)
To JEDEC J-STD 020D (Tc: +245 °C on pin)
40 °C … +125 °C
–25 °C … +40 °C,
75% RH
Characteristics and ordering codes
L
R
H
0.44
1.25
2.30
2.90
4.35
6.10
7.90
10.00
15.00
20.00
I
sat, 25°C
A
71
50
41
33
30
28
26
24
15
15
I
sat, 100°C
R
DC
(max) R
DC
(typ)
A
71
48
40
29
28
24
23
22
14
14
m
0.25
0.45
0.70
1.15
1.50
1.85
2.20
2.55
2.55
3.25
m
0.20
0.40
0.60
1.00
1.30
1.60
2.00
2.20
2.20
2.80
Height h Approx. Ordering code
(nom.) weight
mm
9.6
11.1
12.8
9.6
11.1
11.1
12.8
12.8
12.8
14.6
g
22.1
24.4
29.5
21.8
25.2
26.3
27.5
29.6
29.6
33.0
B82559A1042A025
B82559A2122A025
B82559A3232A025
B82559A3292A025
B82559A4432A025
B82559A5612A025
B82559A6792A025
B82559A7103A025
B82559A7153A025
B82559A9203A025
Sample kit available. Ordering code: B82559X002
For more information refer to chapter “Sample kits”.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
4
02/16
ERU chokes
Helically wound
Inductance L versus DC load current I
DC
The temperature rise T is measured at an am-
bient temperature of +25 °C. A current is applied
for 30 minutes and the temperature is measured
via a thermocouple placed on top of the device.
No forced air cooling is applied.
The inductance vs current curves are generated
by measuring the chokes at +25 °C and
+100 °C.
B82559A2122A025
B82559*A025
ERU 25
B82559A1042A025
B82559A3232A025
Please read
Cautions and warnings
and
Important notes
at the end of this document.
5
02/16
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