Saturating Chokes and Linear/Saturating Chokes
DFSG, DLFP and DLFL Series
Nominal current:
0.8 - 45 A @
ϑ
a 45°C
Nominal inductance:
50 - 1000
440 VAC
50Hz
µH / tol. ± 15%
Rated voltage UR (Umax.):
Frequency:
Isolation voltage:
Climatic category:
Plastic case:
2 kV eff. / wdg.-ambient
25/100/21 acc. to IEC 60068-1
UL 94 V-0
Potting resin:
UL 94 V-0
All types of chokes correspond to the international specifications
for radio interference chokes (EN 138100).
Magnetic saturating chokes are used mainly in phase angle con-
trol circuits using thyristors, triacs or transistors. These chokes
are called non-linear inductances. Together with capacitors, they
perform as an LC-filter at the point of switching. As soon as the
current starts to flow, the inductance reduces considerably and at
the point of complete saturation, its value is approximately than
of an air cored coil. Chokes of this kind are very popular due to
their low cost-volume ratio.
The use of iron powder toroids will reduce to negligible levels an
undesirable noise which may be generated by the usage of iron
laminations core. The new chokes (DLFP, DLFL) were developed
for rated current above 10A.
Saturating and linear chokes act at their optimum when they are
mounted directly at the interference originator (thyristor, triac).
For highest requirements concerning the interference suppression
is recommended a combination of two saturation chokes (appli-
cation 1) or a saturation chokes together with a magnetically com-
pensated multiple choke (application 2).
The new DLFP/DLFL series of chokes still show more than 40% of
their inductance at IN . Due to this charateristic, we call them
«linear-saturating chokes».
Technical Data saturating chokes DFSG
Type
IN
[A]
C x 1 / C x 2 Rcu(2) Case
F] [mΩ]
Dimensions
A x D x H [mm]
[µ
DFSG1-20-0.8/a
0.8
18 x 18 x 15 0.10/0.15 1300
00
00
08
08
17
17
21
21
DFSG1-20-1.5/a 1.5
18 x 18 x 15 0.10/0.15
22 x 22 x 18 0.15/0.22
22 x 22 x 18 0.15/0.22
30 x 30 x 22 0.15/0.22
30 x 30 x 22 0.22/0.22
33 x 33 x 25 0.22/0.22
33 x 33 x 25 0.47/0.47
450
260
100
165
60
DFSG1-25-2/a
DFSG1-25-3/a
DFSG1-30-3/a
DFSG1-30-6/a
DFSG1-33-5/a
2
3
3
6
5
70
DFSG1-33-10/a 10
30
Technical Data linear-saturating chokes DLFP with leads connection
Type
IN
[A]
(1) L/L at IN
[mH]
Itrue
[A]
R
[mΩ]
cu (2)
Power loss
[W]
fRes
[MHz]
Energy Noise level (3)
Cx
Connection Case
[mm]
[A2 x mH]
[dB
µV]
[
µ
F]
DLFP-0125-0501
DLFP-0125-08D5
5
8
1.0/0.4
5
8
120
54
38
3
0.8
25
32
54
56
60
60
60
62
55
0.047
0.1
1.0
25W
25W
47W
47W
47W
0.5/0.2
3.5
5.5
6.4
6.3
6.5
12
1.32
1.16
1.69
2.5
1.25
1.7
DLFP-0147-12D5 12
DLFP-0147-16D3 16
DLFP-0147-25D2 25
0.5/0.2
12
16
25
35
45
72
0.1
0.3/0.12
0.15/0.05
0.05/0.02
0.2/0.06
25
79
0.22
0.47
1.5
1.8
10
94
2.36
DLFP-0147-35C5
DLFP-0132-45D2
35
45
5.3
3.5
61
1.5 x 4.5 47W
2 x 5 32W
6
1.1
405
1
Technical Data linear-saturating chokes DLFL for PCB mounting
Type
IN
[A]
(1) L/L ati IN
[mH]
Itrue
[A]
R
[mΩ]
cu (2)
Power loss
[W]
fRes
[MHz]
Energy
[A2 x mH]
Noise level (3) Cx
[dB V] F]
Connection Case
[mm]
µ
[µ
DLFL-0125-0501
DLFL-0125-08D5
DLFL-0147-12D5
DLFL-0147-16D3
DLFL-0147-25D2
DLFL-0147-35C5
DLFL-0132-45D2
5
8
1.0/0.4
5
8
120
54
38
25
10
3
3.5
5.5
6.4
6.3
6.5
12
0.8
25
32
54
0.047
0.1
1.0
25-P
25-P
47-P
47-P
47-P
47-P
32-P
0.5/0.2
1.32
1.16
1.69
2.5
56
60
60
60
62
55
1.25
1.7
12
16
25
35
45
0.5/0.2
12
16
25
35
45
72
0.1
0.3/0.12
0.15/0.05
0.05/0.02
0.2/0.06
79
0.22
0.47
1.5
1.8
94
2.36
1.5 x 4.5
2 x 5
5.3
6.0
3.5
61
405
1.1
1
(1) Nominal inductance measured according to EN 138100, see introduction of this catalog, Paragraph 3.4
(2) Resistance @ ϑ a 25°C
(3) Measured at 150 kHz according to VDE 0565, Part 2 and EN 55014 Quasi Peak.
The measuring diagram correspond to application example 3, without CY capacitors.
30