1998 Aug 28 1
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
FEATURES
•Low cost
•Low noise
•Small size (SFR16S).
APPLICATIONS
•General purpose resistors.
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
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”
.
QUICK REFERENCE DATA
DESCRIPTION VALUE
SFR16S SFR25 SFR25H
Resistance range 1 Ωto 3 MΩ1Ωto 10 MΩ and jumper (0 Ω)
Resistance tolerance ±5%, E24 series
Temperature coefficient:
R<4.7 Ω≤±250 ×10−6/K ≤±100 ×10−6/K ≤±100 ×10−6/K
4.7 Ω≤R≤100 kΩ≤±100 ×10−6/K ≤±100 ×10−6/K ≤±100 ×10−6/K
100 kΩ<R≤1MΩ≤±250 ×10−6/K ≤±100 ×10−6/K ≤±100 ×10−6/K
R>1MΩ≤±250 ×10−6/K ≤±250 ×10−6/K ≤±250 ×10−6/K
Absolute maximum dissipation
at Tamb =70°C0.5 W 0.4 W 0.5 W
Thermal resistance, Rth 170 K/W 200 K/W 150 K/W
Maximum permissible voltage 200 V 250 V 350 V
Noise:
R<68 kΩmax. 0.1 µV/V max. 0.1 µV/V max. 0.1 µV/V
68 kΩ≤R≤100 kΩmax. 0.5 µV/V max. 0.1 µV/V max. 0.1 µV/V
100 kΩ≤R≤1MΩmax. 1.5 µV/V max. 0.1 µV/V max. 0.1 µV/V
R>1MΩmax. 1.5 µV/V max. 1.5 µV/V max. 1.5 µV/V
Basic specifications IEC 60115-1 and 60115-2
Climatic category (IEC 60068) 55/155/56
Stability, ∆R/R max., after:
load:
R≤1MΩ±1% + 0.05 Ω±1% + 0.05 Ω±1% + 0.05 Ω
R>1MΩ±1% + 0.05 Ω±1% + 0.05 Ω±2% + 0.1 Ω
climatic tests:
R≤1MΩ±1% + 0.05 Ω±1% + 0.05 Ω±1% + 0.05 Ω
R>1MΩ±1% + 0.05 Ω±1% + 0.05 Ω±2% + 0.1 Ω
soldering ±0.25% + 0.05 Ω±0.25% + 0.05 Ω±0.25% + 0.05 Ω
short time overload ±0.25% + 0.05 Ω±0.25% + 0.05 Ω±1% + 0.05 Ω
1998 Aug 28 2
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
ORDERING INFORMATION
Table 1 Ordering code indicating resistor type and packaging
Note
1. The jumper has a maximum resistance Rmax =10mΩ at 5 A.
TYPE
ORDERING CODE 23.. ... .....
BANDOLIER IN AMMOPACK BANDOLIER ON REEL
RADIAL TAPED STRAIGHT LEADS STRAIGHT LEADS
4000 units 1000 units 5000 units 5000 units
SFR16S −22 187 73... 22 187 53... 22 187 83...
SFR25 06 184 03... 22 181 53... 22 181 43... 22 181 63...
SFR25 jumper(1) −−22 181 90019 −
SFR25H −22 186 16... 22 186 76... 22 186 26...
Ordering code (12NC)
•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 3 digits indicate the
resistance value:
– The first 2 digits indicate the
resistance value.
– The last digit indicates the
resistance decade in
accordance with Table 2.
Table 2 Last digit of 12NC
RESISTANCE
DECADE LAST DIGIT
1 to 9.76 Ω8
10 to 97.6 Ω9
100 to 976 Ω1
1 to 9.76 kΩ2
10 to 97.6 kΩ3
100 to 976 kΩ4
1 to 9.76 MΩ5
10 MΩ6
ORDERING EXAMPLE
The ordering code of a SFR25
resistor, value 5600 Ω±5%, taped
on a bandolier of 5000 units in
ammopack is: 2322 181 43562.
1998 Aug 28 3
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
FUNCTIONAL DESCRIPTION
Product characterization
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”
.
Fig.1 Drift nomogram.
handbook, full pagewidth
MEA595
P
(W)
T ( C)
mo
0.5
0.4
0.3
0.2
0.1
T =
amb 40 C
o70 C
o
100 C
o
125 C
o
155 C
o
1.5 1.0 0.7 0.5 0.3 0.2 0.1 %
2.0 1.5 1.0 0.7 0.5 0.3 0.2 %
∆ R / R for R 100 kΩ
∆ R / R for R 100 kΩ
10000 h
1000 h
22 kΩ
1 kΩ
100 kΩ
100 kΩ
SFR16S
1998 Aug 28 4
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
Fig.2 Drift nomogram.
SFR25(H)
Pn=0.4W(SFR25)or0.5W(SFR25H).
handbook, full pagewidth
MLB651
P
(%)
T ( C)
mo
100
75
50
25
T =
amb 40 C
o70 C
o
100 C
o
125 C
o
155 C
o
3.0 2.0 1.0 0.7 0.5 0.3 %
∆ R / R for R 1 MΩ
∆ R / R for R 1 MΩ
10000 h
1000 h
100 kΩ
1 kΩ
1 MΩ
1 MΩ
2.0 1.5 1.0 0.7 0.5 0.3 0.2 %
1998 Aug 28 5
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
Limiting values
Note
1. The maximum voltage that may be continuously applied to the resistor element, see
“IEC publication 60115-1”
.
The maximum permissible hot-spot temperature is 155 °C.
DERATING
The power that the resistor can dissipate depends on the operating temperature; see Fig.3.
TYPE LIMITING VOLTAGE(1)
(V) LIMITING POWER
(W)
SFR16S 200 0.5
SFR25 250 0.4
SFR25H 350 0.5
Fig.3 Maximum dissipation (Pmax) in percentage of rated power as a function of the ambient temperature (Tamb).
handbook, 4 columns
MLB650
40 60 70 80 Tamb ( C)
o
100
Pmax
rated
(%P )
0
25
50
75
100
140120 155
R 1 MΩ
1998 Aug 28 6
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
PULSE LOADING CAPABILITIES
Fig.4 Pulse on a regular basis; maximum permissible peak pulse power ( max)
as a function of pulse duration (ti). P
ˆ
SFR16S
handbook, full pagewidth
10–5 10–4 10–3 10–2 10–1 1
MEA685 - 1
103
1
10
102
Pmax
(W)
ti(s)
10–6
10–1
t /t = 1000
pi500
200
100
50
20
10
5
2
Fig.5 Pulse on a regular basis; maximum permissible peak pulse voltage ( max)
as a function of pulse duration (ti).
V
ˆ
handbook, full pagewidth
MEA689
600
0
10 610 510 410 310 210 11
500
400
300
200
100
Vmax
(V)
ti(s)
SFR16S
1998 Aug 28 7
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
Fig.6 Pulse on a regular basis; maximum permissible peak pulse power ( max)
as a function of pulse duration (ti). P
ˆ
SFR25
handbook, full pagewidth
10 510 410 310 210 11
MLB389
103
1
10
102
Pmax
(W)
ti(s)
10 6
10 1
2
5
10
20
50
100
200 500
pi
t /t = 1000
Fig.7 Pulse on a regular basis; maximum permissible peak pulse voltage ( max)
as a function of pulse duration (ti).
V
ˆ
SFR25
handbook, full pagewidth
MEA678
600
0
10 610 510 410 310 210 11
500
400
300
200
100
Vmax
(V)
ti(s)
1998 Aug 28 8
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
SFR25H
Fig.8 Pulse on a regular basis; maximum permissible peak pulse power ( max)
as a function of pulse duration (ti). P
ˆ
handbook, full pagewidth
10 510 410 310 210 11
MLB653
103
1
10
102
Pmax
(W)
ti(s)
10 6
10 1
2
5
10
20
50
100
200
500
pi
t /t = 1000
Fig.9 Pulse on a regular basis; maximum permissible peak pulse voltage ( max)
as a function of pulse duration (ti).
V
ˆ
SFR25H
handbook, full pagewidth
MLB654
1200
0
10 610 510 410 310 210 11
800
400
Vmax
(V)
ti(s)
1998 Aug 28 9
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
Application information
Fig.10 Hot-spot temperature rise (∆T) as
a function of dissipated power.
SFR16S
handbook, halfpage
0 0.2 0.4 0.8
100
0
50
MEA591
0.6 P (W)
T
(K)
∆
Fig.11 Temperature rise (∆T) at the end of the lead
(soldering point) as a function of dissipated
power at various lead lengths after mounting.
SFR16S
handbook, halfpage
0 0.2 0.4 0.8
60
0
40
MEA592
0.6 P (W)
T
(K)
20
∆2 5 10 15 mm
Fig.12 Hot-spot temperature rise (∆T) as
a function of dissipated power.
handbook, halfpage
0 0.5
100
0
20
MLB652
40
60
80
0.1 0.2 0.3 0.4 P (W)
∆ T
(K) SFR25
SFR25H
SFR25/SFR25H
Fig.13 Temperature rise (∆T) at the end of the lead
(soldering point) as a function of dissipated
power at various lead lengths after mounting.
SFR25
handbook, halfpage
0 0.1 0.5
40
30
10
0
20
MLB388
0.2 0.3 0.4 P (W)
∆ T
(K) 5 mm
10
15
1998 Aug 28 10
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
Fig.14 Temperature rise (∆T) at the end of the lead
(soldering point) as a function of dissipated
power at various lead lengths after mounting.
SFR25H
handbook, halfpage
50
0 0.2 0.6
0
MEA687
0.4
10
20
30
40
P (W)
∆ T
(K)
5 mm
10 mm
15 mm
MECHANICAL DATA
Mass per 100 units
Marking
The nominal resistance and tolerance are marked on the
resistor using four or five coloured bands in accordance
with IEC publication 60062
“Colour codes for fixed
resistors”
.
Outlines
The length of the body (L1) is measured by inserting the
leads into holes of two identical gauge plates and moving
these plates parallel to each other until the resistor body is
clamped without deformation
(“IEC publication 60294”)
.
TYPE MASS
(g)
SFR16S 12.5
SFR25 25
Table 3 Resistor type and relevant physical dimensions; see Fig.15
TYPE ∅D
MAX.
(mm)
L1
MAX.
(mm)
L2
MAX.
(mm)
∅d
(mm)
SFR16S 1.9 3.2 3.4 0.45 ±0.05
SFR25 2.5 6.5 7.0 0.58 ±0.05
SFR25H 2.5 6.5 7.0 0.58 ±0.05
For dimensions see Table 3.
Fig.15 Outline.
handbook, 4 columns
∅D
CCB414
L1
L2
∅d
1998 Aug 28 11
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with the schedule of
“IEC publication 60115-1”
, category 55/155/56 (rated temperature range
−55 °C to +155 °C; damp heat, long term, 56 days). The testing also
covers the requirements specified by EIA and EIAJ.
The tests are carried out in accordance with IEC publication 68,
“Recommended basic climatic and mechanical robustness testing
procedure for electronic components”
and under standard atmospheric
conditions according to
“IEC 60068-1”
, subclause 5.3.
Unless otherwise specified the following values apply:
Temperature: 15 °Cto35°C
Relative humidity: 45% to 75%
Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).
In Table 4 the tests and requirements are listed with reference to the
relevant clauses of
“IEC publications 60115-1 and 60068”
; a short
description of the test procedure is also given. In some instances
deviations from the IEC recommendations were necessary for our
method of specifying.
Table 4 Test procedures and requirements
IEC
60115-1
CLAUSE
IEC
60068
TEST
METHOD
TEST PROCEDURE RESISTANCE
RANGE
REQUIREMENTS
SFR16S SFR25 SFR25H
4.16 U robustness of
terminations:
4.16.2 Ua tensile all
samples ∅0.45 mm, load 5 N; 10 s number of failures <10 ×10−6
∅0.58 mm, load 10 N; 10 s
4.16.3 Ub bending half
number of
samples
∅0.45 mm, load 2.5 N; 4 ×90°number of failures <10 ×10−6
∅0.58 mm, load 5 N; 4 ×90°
4.16.4 Uc torsion other half
of samples 3×360° in opposite directions no damage
∆R/R max.: ±0.25% + 0.05 Ω
4.17 Ta solderability 2 s; 235 °C; flux 600 good tinning; no damage
4.18 Tb resistance to
soldering heat thermal shock: 3 s; 350 °C;
6 mm from body ∆R/R max.: ±0.25% + 0.05 Ω
4.19 Na rapid change of
temperature 30 minutes at −55 °C and
30 minutes at +155 °C; 5 cycles ∆R/R max.: ±0.25% + 0.05 Ω
4.20 Eb bump 3 ×1500 bumps in 3 directions;
40 g no damage
∆R/R max.: ±0.25% + 0.05 Ω
4.22 Fc vibration frequency 10 to 500 Hz;
displacement 1.5 mm or
acceleration 10 g; 3 directions;
total 6 hours (3 ×2 hours)
no damage
∆R/R max.: ±0.25% + 0.05 Ω
1998 Aug 28 12
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
4.23 climatic sequence: Rins min.: 1000 MΩ
4.23.2 Ba dry heat 16 hours; 155 °C
4.23.3 Db damp heat
(accelerated)
1st cycle
24 hours; 55 °C; 90 to 100% RH
4.23.4 Aa cold 2 hours; −55 °C
4.23.5 M low air pressure 2 hours; 8.5 kPa; 15 to 35 °C
4.23.6 Db damp heat
(accelerated)
remaining cycles
5 days; 55 °C; 95 to 100% RH R ≤1MΩ∆R/R max.: ±1% + 0.05 Ω
R>1MΩ∆R/R max.: ±1% + 0.05 Ω∆R/R max.:
±2% + 0.1 Ω
4.24.2 Ca damp heat
(steady state) 56 days; 40 °C; 90 to 95% RH;
dissipation 0.01 Pn
Rins min.: 1000 MΩ
∆R/R max.: ±1% + 0.05 Ω
4.25.1 endurance 1000 hours at 70 °C;
Pn or Vmax
R≤1MΩ∆R/R max.: ±1% + 0.05 Ω
R>1MΩ∆R/R max.: ±1% + 0.05 Ω∆R/R max.:
±2% + 0.1 Ω
4.8.4 temperature
coefficient between −55 °C and +155 °C
(TC ×10−6/K) R<4.7 Ω≤±250 ≤±100 ≤±100
R≤100 kΩ≤±100 ≤±100 ≤±100
R≤1MΩ≤±250 ≤±100 ≤±100
R>1MΩ≤±250 ≤±250 ≤±250
4.7 voltage proof on
insulation 400 V (RMS) (SFR16S) or
600 V (RMS) (SFR25 and
SFR25H); during 1 minute;
V-block method
no breakdown
4.12 noise
“IEC publication 60195”
R<68 kΩmax. 0.1 µV/V max. 0.1 µV/V max. 0.1 µV/V
R≤100 kΩmax. 0.5 µV/V max. 0.1 µV/V max. 0.1 µV/V
R≤1MΩmax. 1.5 µV/V max. 0.1 µV/V max. 0.1 µV/V
R>1MΩmax. 1.5 µV/V max. 1.5 µV/V max. 1.5 µV/V
4.6.1.1 insulation
resistance 500 V (DC) during 1 minute;
V-block method Rins min.: 1000 MΩ
IEC
60115-1
CLAUSE
IEC
60068
TEST
METHOD
TEST PROCEDURE RESISTANCE
RANGE
REQUIREMENTS
SFR16S SFR25 SFR25H
1998 Aug 28 13
Philips Components Product specification
Standard metal film resistors SFR16S/25/25H
4.13 short time overload room temperature;
P = 6.25 ×Pn (SFR25) or
6.25 ×0.25 W (SFR16S);
5 s on, 45 s off (V ≤2×Vmax);
10 cycles
∆R/R max.: ±0.25% + 0.05 Ω∆R/R max.:
±1% + 0.05 Ω
intermittent
overload in
accordance with
“JIS-C5202 5.8”
16 ×0.16 W; 1 s on and 25 s of f;
10000 ±200 cycles;
Vmax = 600 V
∆R/R max.:
±0.75% + 0.05 Ω−−
see 2nd amendment
to
“IEC 60115-1”
,
Jan. ’87
pulse load see Figs 4, 5, 6, 7, 8 and 9
IEC
60115-1
CLAUSE
IEC
60068
TEST
METHOD
TEST PROCEDURE RESISTANCE
RANGE
REQUIREMENTS
SFR16S SFR25 SFR25H
