SF 2020
2 & 6 AMP
db
IEC INLET FILTER
WITH VOLTAGE SELECTOR & FUSEHOLDER.
90
80
70
60
50
40
30
20
10
.1
.15
.4
1
4
10
Frequency MHz
40
100
500
SYMMETRIC
ASYMMETRIC
SF 2020
Rated
Leakage Current
Current A @ 250V 50Hz
Inductance
mH
Connections
Input
Output
Number
of Fuses
Mounting
Approvals
SF 2020-2/
*
/†
SF 2022-2/
*
/†
SF 2024-2/
*
/†
SF 2026-2/
*
/†
SF 2020-6/
*
/†
SF 2022-6/
*
/†
SF 2024-6/
*
/†
SF 2026-6/
*
/†
2
2
2
2
6
6
6
6
0.2mA
0.2mA
0.2mA
0.2mA
0.2mA
0.2mA
0.2mA
0.2mA
2.0
2.0
2.0
2.0
0.5
0.5
0.5
0.5
IEC 320
IEC 320
IEC 320
IEC 320
IEC 320
IEC 320
IEC 320
IEC 320
6.3 x 0.8 Faston
6.3 x 0.8 Faston
6.3 x 0.8 Faston
6.3 x 0.8 Faston
6.3 x 0.8 Faston
6.3 x 0.8 Faston
6.3 x 0.8 Faston
6.3 x 0.8 Faston
1
2
1
2
1
2
1
2
Snap-in
Snap-in
Screw Mount
Screw Mount
Snap-in
Snap-in
Screw Mount
Screw Mount
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
Temperature Range:
-25
0
C to +85
0
C
Operating Voltage:
250Vac
Operating Frequency:
0 to 400Hz
Test Voltage:
L+N to ground, 2700Vdc,
2 seconds
s
Approved
❏
Submitted for Approval
PART NUMBER DESIGNATION
Mounting
SF 2020
SF 2022
SF 2024
SF 2026
Style/Fuse Variants
Snap-in with one fuse
Snap-in with two fuses
Screw Mount with one fuse
Screw Mount with two fuses
Switching Arrangement
*
-
For tapped transformer 110, 220,
/1
240V
/2 For separate winding tapped transformer
Series/parallel 100, 120, 220, 240V
/3 For separate winding transformer
Series/parallel 115, 230V
IEC 950
(EN 60950) Applications)
Twin fused versions only
†
- Fuse Size
/ /1 5mm dia x 20mm
*
/ /2 6.3mm dia x 32mm
*
(0.25”dia x 1.25”)
DIMENSIONS
All dimensions are nominal and in mm
5.5
40
FRONT AND REAR MOUNTING
40±0.2
FRONT MOUNTING
ø 3.2
PANEL
CUT OUT
SCREW
MOUNTING
ø 3.6
PANEL
CUT OUT
SNAP IN
DIM A
54.3
56
R3.0
53.5
50
32
29.0
R3.0
28.6±0.1
Panel Thickness Dim A
0.8 to 2.0
2.1 to 3.2
56.0±0.1
56.3±0.1
Continued on next page
20
FOR MORE INFORMATION PLEASE PHONE
01638 665161
SF 2020
Continued from previous page
CIRCUIT DIAGRAMS
Series/Series Connection of Tapped
Transformer
In single fuse version use H2 instead of H1
Voltage
N
L1
H2
E
L
0.047µF (X2)
H1
External
Switch
F
e
d
c
D
110V
C
220V
A
a
240V
E
Contacts
b,e
b,c
a
110V
220V
240V
G
L1
2x2,200pF (Y)
b
B
Series/Parallel Connection of
Separate Winding Transformer with
One Tap
In single fuse version use H2 instead of H1
N
L1
H2
E
L
0.047µF (X2)
H1
External
Switch
e
d
c
D
C
120V
F
Voltage
E
Contacts
a,c,e
b,c,e
a,d
b,d
100V
120V
220V
240V
G
L1
2x2,200pF (Y)
b
B
a
120V
A
100V
Series/Parallel Connection of
Separate Winding Transformer
In single fuse version use H2 instead of H1
F
Voltage
N
L1
H2
E
L
0.047µF (X2)
H1
External
Switch
C
e
d
c
b
a
A
115V
D
115V
E
Contacts
a,c,e
b,c,e
a,d
b,d
115V
115V
230V
230V
G
L1
2x2,200pF (Y)
B
Note
The circuits are shown with an external
(2 pole - 2 way) on/off switch. For use
without external switch, make the
following connections:
Circuit 1
H1 (or H2) to transformer
neutral
G to B
Circuit 2
H1 (or H2) to F
G to B
Circuit 3
H1 (or H2) to F
G to C
FOR MORE INFORMATION PLEASE PHONE
01638 665161
21
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