BCcomponents
DATA SHEET
SFR16S/25/25H
Standard metal film resistors
Product specification
Supersedes data of 18th September 2000
File under BCcomponents, BC08
2002 Apr 17
BCcomponents
Product specification
Standard metal film resistors
FEATURES
DESCRIPTION
A homogeneous film of metal alloy is
deposited on a high grade ceramic
body. After a helical groove has been
cut in the resistive layer, tinned
connecting leads of electrolytic copper
are welded to the end-caps.
The resistors are coated with a
coloured lacquer (light-blue for
SFR16S/25/25H
type SFR16S; light-green for type
SFR25 and red-brown for type
SFR25H) which provides electrical,
mechanical and climatic protection.
The encapsulation is resistant to all
cleaning solvents, in accordance with
“MIL-STD-202E, method 215”,
and
“IEC 60068-2045”.
•
Low cost
•
Low noise
•
Small size (SFR16S).
APPLICATIONS
•
General purpose resistors.
QUICK REFERENCE DATA
DESCRIPTION
Resistance range
Resistance tolerance
Temperature coefficient:
R
<
4.7
Ω
4.7
Ω ≤
R
≤
100 k
Ω
100 k
Ω <
R
≤
1 M
Ω
R
>
1 M
Ω
Absolute maximum dissipation
at T
amb
= 70
°
C
Thermal resistance, R
th
Maximum permissible voltage
Noise:
R
<
68 k
Ω
68 k
Ω ≤
R
≤
100 k
Ω
100 k
Ω ≤
R
≤
1 M
Ω
R
>
1 M
Ω
Basic specifications
Climatic category (IEC 60068)
Stability,
∆
R/R max., after:
load:
R
≤
1 M
Ω
R
>
1 M
Ω
climatic tests:
R
≤
1 M
Ω
R
>
1 M
Ω
soldering
short time overload
max. 0.1
µ
V/V
max. 0.5
µ
V/V
max. 1.5
µ
V/V
max. 1.5
µ
V/V
max. 0.1
µ
V/V
max. 0.1
µ
V/V
max. 0.1
µ
V/V
max. 1.5
µ
V/V
IEC 60115-1 and 60115-2
55/155/56
max. 0.1
µ
V/V
max. 0.1
µ
V/V
max. 0.1
µ
V/V
max. 1.5
µ
V/V
VALUE
SFR16S
1
Ω
to 3 M
Ω
SFR25
SFR25H
0.22
Ω
to 10 M
Ω
and jumper (0
Ω
)
±
1%, E24/E96 series;
±
5%, E24 series
≤±
250
×
10
−6
/K
≤±
100
×
10
−6
/K
≤±
250
×
10
−6
/K
≤±
250
×
10
−6
/K
0.5 W
170 K/W
200 V
≤±
100
×
10
−6
/K
≤±
100
×
10
−6
/K
≤±
100
×
10
−6
/K
≤±
250
×
10
−6
/K
0.4 W
200 K/W
250 V
≤±
100
×
10
−6
/K
≤±
100
×
10
−6
/K
≤±
100
×
10
−6
/K
≤±
250
×
10
−6
/K
0.5 W
150 K/W
350 V
±
1% + 0.05
Ω
±
1% + 0.05
Ω
±
1% + 0.05
Ω
±
1% + 0.05
Ω
±
0.25% + 0.05
Ω
±
0.25% + 0.05
Ω
±
1% + 0.05
Ω
±
1% + 0.05
Ω
±
1% + 0.05
Ω
±
1% + 0.05
Ω
±
0.25% + 0.05
Ω
±
0.25% + 0.05
Ω
±
1% + 0.05
Ω
±
2% + 0.1
Ω
±
1% + 0.05
Ω
±
2% + 0.1
Ω
±
0.25% + 0.05
Ω
±
1% + 0.05
Ω
2002 Apr 17
2
BCcomponents
Product specification
Standard metal film resistors
ORDERING INFORMATION
Table 1
12NC ordering code indicating resistor type and packaging
ORDERING CODE 23.. ... .....
TYPE
TOL.
RADIAL TAPED
4 000 units
SFR16S
BANDOLIER
IN AMMOPACK
STRAIGHT LEADS
1 000 units
..22 187 73...
SFR16S/25/25H
BANDOLIER
ON REEL
STRAIGHT LEADS
5 000 units
..22 187 83...
5 000 units
..22 187 53...
..06 187 3...
..22 181 43...
..22 188 2...
..22 181 90019
..22 186 76...
..22 186 3....
±
5%
±
1%
±
5%
±
1%
jumper
(1)
−
−
..06 184 03...
−
..22 181 53...
−
..22 181 63...
SFR25
SFR25H
SFR25H
Note
−
−
−
−
−
−
..22 186 16...
−
−
..22 186 26...
..06 186 8....
±
5%
±
1%
−
1. The jumper has a maximum resistance R
max
= 10 m
Ω
at 5 A.
Composition of the 12NC
Table 2
Last digit for
±
5%
tolerance
LAST DIGIT
7
8
9
1
2
3
4
5
6
Table 3
Last digit for
±
1%
tolerance
LAST DIGIT
7
8
9
1
2
3
4
5
6
•
The resistors have a 12-digit
ordering code
starting with 23
•
The subsequent 7 digits indicate the
resistor type and packaging;
see Table 1.
•
The remaining digits indicate the
resistance value:
– The first 2 or 3 digits indicate the
resistance value.
– The last digit indicates the
resistance decade in accordance
with Tables 2 or 3.
RESISTANCE
DECADE
0.10 to 0.91
Ω
1 to 9.1
Ω
10 to 91
Ω
100 to 910
Ω
1 to 9.1 k
Ω
10 to 91 k
Ω
100 to 910 k
Ω
1 to 9.1 M
Ω
RESISTANCE
DECADE
0.10 to 0.976
Ω
1 to 9.76
Ω
10 to 97.6
Ω
100 to 976
Ω
1 to 9.76 k
Ω
10 to 97.6 k
Ω
100 to 976 k
Ω
1 to 9.76 M
Ω
≥
10 M
Ω
≥
10 M
Ω
O
RDERING EXAMPLE
: 12NC
The ordering code of a SFR25 resistor,
value 5600
Ω ±
5%, taped on a
bandolier of 5000 units in ammopack
is: 2322 181 43562.
2002 Apr 17
3
BCcomponents
Product specification
Standard metal film resistors
FUNCTIONAL DESCRIPTION
Product characterization
SFR16S/25/25H
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of
±
5%.
The values of the E24 series are in accordance with
“IEC publication 60063”.
0.5
P
(W)
0.4
T amb = 40
o
C
70
o
C
0.3
100
o
C
0.2
125 C
o
0.1
155
o
C
Tm (
o
C)
10
00
0h
h
00
22
10
10
1k
Ω
k
Ω
0k
Ω
10
0k
Ω
1.5
2.0
1.0
1.5
0.7
1.0
0.5
0.7
0.3
0.5
0.2
0.3
0.1 %
0.2 %
∆
R / R for R
∆
R / R for R
100 kΩ
100 kΩ
MEA595
SFR16S
Fig.1 Drift nomogram.
2002 Apr 17
4
BCcomponents
Product specification
Standard metal film resistors
SFR16S/25/25H
100
P
(%)
75
T amb = 40
o
C
70 C
o
100 C
o
50
125
o
C
25
155
o
C
Tm ( C)
Ω
0k
Ω
1k
o
10
10
00
0h
00
h
1M
Ω
10
1M
Ω
2.0
3.0
1.5
2.0
1.0
0.7
1.0
0.5
0.7
0.3
0.5
0.2 %
0.3 %
∆
R / R for R
∆
R / R for R
1 MΩ
1 MΩ
MLB651
SFR25(H)
P
n
= 0.4 W (SFR25) or 0.5 W (SFR25H).
Fig.2 Drift nomogram.
2002 Apr 17
5
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