ETC1 AC03 Cemented wirewound resitor Datasheet

BCcomponents
DATA SHEET
AC01/03/04/05/07/10/15/20
Cemented wirewound resistors
Product specification
Supersedes data of 17th November 1998
File under BCcomponents, BC08
2000 Oct 20
BCcomponents
Product specification
Cemented wirewound resistors AC01/03/04/05/07/10/15/20
FEATURES
DESCRIPTION
• High power dissipation in
small volume
The resistor element is a resistive wire
which is wound in a single layer on a
ceramic rod. Metal caps are pressed
over the ends of the rod.
The ends of the resistance wire and the
leads are connected to the caps by
welding. Tinned copper-clad iron
leads with poor heat conductivity are
employed permitting the use of
relatively short leads to obtain stable
mounting without overheating the
solder joint.
• High pulse load handling
capabilities.
APPLICATIONS
• Ballast switching
• Shunt in small electric motors
• Power supplies.
The resistor is coated with a green
silicon cement which is not resistant to
aggressive fluxes. The coating is
non-flammable, will not drip even at
high overloads and is resistant to most
commonly used cleaning solvents, in
accordance with “MIL-STD-202E,
method 215” and “IEC 60068-2-45”.
QUICK REFERENCE DATA
DESCRIPTION
Resistance range
VALUE
AC01
AC03
AC04
AC05
AC07
AC10
AC15
AC20
0.1 Ω= 0.1 Ω
to
to
2.4 kΩ= 5.1 kΩ
0.1 Ω
to
6.8 kΩ
0.1 Ω
to
10 kΩ
0.1 Ω
to
15 kΩ
0.68 Ω
to
27 kΩ
0.82 Ω
to
39 kΩ
1.2 Ω
to
56 kΩ
±5%; E24 series
Resistance tolerance
350 °C
Maximum permissible body temperature
Rated dissipation at Tamb = 40 °C
1W
3W
4W
5W
7W
10 W
15 W
20 W
Rated dissipation at Tamb = 70 °C
0.9 W
2.5 W
3.5 W
4.7 W
5.8 W
8.4 W
12.5 W
16 W
Climatic category (IEC 60 068)
40/200/56
Basic specification
IEC 60115-1
Stability after:
load, 1000 hours
∆R/R max.: ±5% + 0.1 Ω
climatic tests
∆R/R max.: ±1% + 0.05 Ω
short time overload
∆R/R max.: ±2% + 0.1 Ω
2000 Oct 20
2
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
ORDERING INFORMATION
Table 1
Ordering code indicating resistor type and packaging
ORDERING CODE 23.. ... .....
TYPE
LOOSE IN BOX
BANDOLIER IN AMMOPACK
STRAIGHT LEADS
RADIAL
STRAIGHT LEADS
100 units
2 500 units
500 units
1 000 units
AC01
−
06 328 90...(2)
−
06 328 33...
AC03(1)
−
−
22 329 03...
−
AC04(1)
−
−
22 329 04...
−
AC05(1)
−
−
22 329 05...
−
AC07(1)
−
−
22 329 07...
−
AC10
−
−
22 329 10...
−
AC15
22 329 15...
−
−
−
AC20
22 329 20...
−
−
−
Notes
1. Products with bent leads and loose in box, are available on request.
2. Last 3 digits available on request.
Ordering code (12NC)
Table 2
Last digit of 12NC
• The resistors have a 12-digit
ordering code starting with 23
RESISTANCE
DECADE
• The subsequent 7 digits indicate the
resistor type and packaging;
see Table 1.
0.1 to 0.91 Ω
7
1 to 9.1 Ω
8
LAST DIGIT
• The remaining 3 digits indicate the
resistance value:
10 to 91 Ω
9
100 to 910 Ω
1
– The first 2 digits indicate the
resistance value.
1 to 9.1 kΩ
2
10 to 56 kΩ
3
– The last digit indicates the
resistance decade in accordance
with Table 2.
2000 Oct 20
3
ORDERING EXAMPLE
The ordering code of an AC01 resistor,
value 47 Ω, supplied in ammopack of
1000 units is: 2306 328 33479.
Product specifications deviating
from the standard values are available
on request.
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
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”.
Limiting values
TYPE
LIMITING POWER
(W)
LIMITING VOLTAGE(1)
(V)
Tamb = 40 °C
Tamb = 70 °C
AC01
1
0.9
AC03
3
2.5
AC04
4
3.5
AC05
5
4.7
7
5.8
AC10
10
8.4
AC15
15
12.5
AC20
20
16.0
AC07
Pn × R
V =
Note
1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60266”.
The maximum permissible hot-spot temperature is 350 °C.
DERATING
The power that the resistor can dissipate depends on the operating temperature; see Fig.1.
100
Pmax 90
(%)
MRA574
50
0
40
0
40
70
Tamb ( o C)
200
Fig.1 Maximum dissipation (Pmax) as a function of the ambient temperature (Tamb).
2000 Oct 20
4
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
PULSE LOADING CAPABILITIES
How to generate the maximum allowed pulse-load from the graphs composed for wirewound resistors of the AC-types.
Single pulse condition; see Fig.3
1. If the applied pulse energy in Joules or Wattseconds is
known and also the R-value to be used in the
application; take the R-value on the X-axis and go
vertically to the curved line. From this point go
horizontally to the Y-axis, this point gives the maimum
allowed pulse energy in Joules/ohm or Wattsec./ohm.
By multiplying this figure with -value in use gives the
maximum allowed pulse-energy in Joules or Wattsec. If
this figure is higher than the applied pulse-energy the
application is allowed. Otherwise take one of the other
graphs belonging to AC-types with higher Pn.
Repetitive pulse condition; see Fig.2
With these graphs we can determine the allowed
pulse-energy in Watts depending on the impulse- time ti and
the repetition time tp of the pulses. The parameter is the
Resistance Value. If the pulse shape is known (impulse-time
ti and repetition time tp), draw a line vertically from the
X-axis at the mentioned ti to the line of the involved R-value.
From the intersection the horizontal line to the Y- axis
indicates the maximum allowed pulse-load at a certain tp/ti.
If the vertical line from the X-axis crosses the applied tp/ti
before reaching the R-line, this tp/ti line gives the maximum
allowed pulse-energy at the Y-axis. If the applied
pulse-energy is known (in Watts) and the impulse-time ti
also, draw a line horizontally from the Y-axis to the crossing
with the pulse-line (ti) and find the possible R-value needed
in this application. The horizontal tp/ti lines give the
maximum allowed pulse-load till they reach the R-line, that
point indicates the maximum allowed impulse-time ti at the
horizontal axis.
2. If, contrary to the information above, the applied
peak-voltage and impulse times ti are known. Calculate
the pulse-energy (Ep) in Joules or Wattsec. by the use of
the following formula:
2
Vp
Ep = ---------- × ti (Vp = peak voltage; ti = impulse-time)
R
By dividing this result with the Rn-value of the R in use,
gives the value Wattsec./ohm on the Y-axis. Draw a line
horizontally to the curved line and at the intersection
the vertical line to the X-axis gives the maximum
allowed Rn-value to be used in the application. If this
Rn-value is higher than the R-value to be used in the
application, the application is allowed. If not, take one
of the other graphs belonging to AC-types with higher Pn
or change the Rn-value to be used.
2000 Oct 20
5
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB370
104
ˆ max
P
(W)
103
tp/ti = 1000
tp/ti = 200
102
tp/ti = 50
10
tp/ti = 10
0.1 Ω
1Ω
10 Ω
100 Ω
2 kΩ
tp/ti = 2
1
10−1
10−4
10−3
10−2
10−1
1
ti (s)
AC01
Fig.2
Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
CCB371
102
pulse
energy
(Ws/Ω)
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
AC01
Fig.3 Pulse capability; Ws as a function of Rn.
2000 Oct 20
6
103
Rn (Ω)
104
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB372
1500
ˆ max
V
(V)
1000
500
0
10−6
10−5
10−4
10−3
10−2
10−1
1
ti (s)
AC01
Fig.4
ˆ
Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
CCB373
104
ˆ max
P
(W)
tp/ti = 1000
103
tp/ti = 200
102
tp/ti = 50
tp/ti = 10
0.1 Ω
1Ω
10 Ω
110 Ω
4.7 kΩ
10
tp/ti = 2
1
10−1
10−4
10−3
10−2
10−1
ti (s)
AC03
Fig.5
2000 Oct 20
Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
7
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB374
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
103
Rn (Ω)
104
AC03
Fig.6 Pulse capability; Ws as a function of Rn.
CCB375
2000
ˆ max
V
(V)
1500
1000
500
0
10−6
10−5
10−4
10−3
10−2
10−1
AC03
Fig.7
2000 Oct 20
ˆ
Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
8
ti (s)
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB376
104
tp/ti = 1000
ˆ max
P
(W)
103
tp/ti = 200
tp/ti = 50
102
10
tp/ti = 10
0.1 Ω
tp/ti = 2
1Ω
10 Ω
100 Ω
6.8 kΩ
1
10−1
10−4
10−3
10−2
10−1
1
ti (s)
AC04
Fig.8
Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
CCB377
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
AC04
Fig.9 Pulse capability; Ws as a function of Rn.
2000 Oct 20
9
103
Rn (Ω)
104
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB378
2500
ˆ max
V
(V)
2000
1500
1000
500
0
10−6
10−5
10−4
10−3
10−2
10−1
1
ti (s)
AC04
ˆ
Fig.10 Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
CCB379
104
tp/ti = 1000
ˆ max
P
(W)
103
tp/ti = 200
tp/ti = 50
102
tp/ti = 10
10
0.1 Ω
1.1 Ω
11 Ω
100 Ω
8.2 kΩ
tp/ti = 2
1
10−1
10−4
10−3
10−2
10−1
ti (s)
AC05
ˆ
Fig.11 Pulse on a regular basis; maximum permissible peak pulse power ( P
max ) as
a function of pulse duration (ti).
2000 Oct 20
10
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB380
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
103
Rn (Ω)
104
AC05
Fig.12 Pulse capability; W s as a function of Rn.
CCB381
2500
ˆ max
V
(V)
2000
1500
1000
500
0
10−6
10−5
10−4
10−3
10−2
10−1
AC05
ˆ
Fig.13 Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
2000 Oct 20
11
ti (s)
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB382
104
tp/ti = 1000
Pmax
(W)
tp/ti = 200
103
tp/ti = 50
102
tp/ti = 10
0.1 Ω
1Ω
11 Ω
tp/ti = 2
100 Ω
10
15 kΩ
1
10−4
10−3
10−2
10−1
1
ti (s)
AC07
Fig.14 Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
CCB383
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
103
AC07
Fig.15 Pulse capability; W s as a function of Rn.
2000 Oct 20
12
104
Rn (Ω)
105
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB384
5000
ˆ max
V
(V)
4000
3000
2000
1000
0
10−6
10−5
10−4
10−3
10−2
10−1
1
ti (s)
AC07
ˆ
Fig.16 Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
CCB385
105
ˆ max
P
(W)
104
tp/ti = 1000
tp/ti = 200
103
tp/ti = 50
102
tp/ti = 10
0.22 Ω
tp/ti = 2
2.2 Ω
33 Ω
240 Ω
15 kΩ
10
1
10−4
10−3
10−2
10−1
ti (s)
AC10
Fig.17 Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
2000 Oct 20
13
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB386
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
103
104
Rn (Ω)
105
AC10
Fig.18 Pulse capability; W s as a function of Rn.
CCB387
5000
ˆ max
V
(V)
4000
3000
2000
1000
0
10−6
10−5
10−4
10−3
10−2
10−1
AC10
ˆ
Fig.19 Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
2000 Oct 20
14
ti (s)
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB388
105
ˆ max
P
(W)
tp/ti = 1000
104
tp/ti = 200
103
tp/ti = 50
102
tp/ti = 10
0.33 Ω
tp/ti = 2
4.3 Ω
33 Ω
330 Ω
39 kΩ
10
1
10−4
10−3
10−2
10−1
1
ti (s)
AC15
Fig.20 Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
CCB389
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
103
AC15
Fig.21 Pulse capability; W s as a function of Rn.
2000 Oct 20
15
104
Rn (Ω)
105
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB390
7000
ˆ max
V
(V)
6000
5000
4000
3000
2000
1000
0
10−6
10−5
10−4
10−3
10−2
10−1
1
ti (s)
AC15
ˆ
Fig.22 Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
CCB391
105
ˆ max
P
(W)
tp/ti = 1000
104
tp/ti = 200
103
tp/ti = 50
tp/ti = 10
0.47 Ω
tp/ti = 2
5.1 Ω
47 Ω
470 Ω
56 kΩ
102
10
1
10−4
10−3
10−2
10−1
ti (s)
AC20
Fig.23 Pulse on a regular basis; maximum permissible peak pulse power ( Pˆ max ) as
a function of pulse duration (ti).
2000 Oct 20
16
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
CCB392
103
pulse
energy
(Ws/Ω)
102
10
1
10−1
10−2
10−3
10−4
10−1
1
102
10
103
104
Rn (Ω)
105
AC20
Fig.24 Pulse capability; W s as a function of Rn.
CCB393
10000
ˆ max
V
(V)
8000
6000
4000
2000
0
10−6
10−5
10−4
10−3
10−2
10−1
AC20
ˆ
Fig.25 Pulse on a regular basis; maximum permissible peak pulse voltage ( V
max ) as
a function of pulse duration (ti).
2000 Oct 20
17
ti (s)
1
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Application information
MGB730
350
∆T at
hot spot
(K)
300
AC04
AC05
AC07
AC03
AC15
AC10
AC20
250
200
150
100
50
AC01
0
0
4
8
12
16
20
24
P (W)
Fig.26 Temperature rise of the resistor body as a function of the dissipation.
MGB731
MRA573
25
25
∆T = 40 K
lead
length
(mm)
lead
length
(mm)
20
50 K
60 K
20
∆T = 10 K
20 K
30 K
70 K
15
80 K
15
10
0
0.2
0.4
0.6
0.8
10
1.0
0
P (W)
AC01
2
P (W)
3
AC03
Fig.27 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
2000 Oct 20
1
Fig.28 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
18
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
MGB732
25
MGB733
25
∆T = 40 K
lead
length
(mm)
50 K
60 K
∆T = 40 K
lead
length
(mm)
20
50 K
60 K
70 K
80 K
20
70 K
90 K
15
15
80 K
100 K
10
10
0
1
2
3
P (W)
4
0
AC04
1
2
3
4
5
P (W)
AC05
Fig.29 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
Fig.30 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
MGB734
∆T = 40 K
lead
length
(mm)
50 K
60 K
MGB735
25
25
70 K
∆T = 40 K
50 K
lead
length
(mm)
60 K
70 K
80 K
80 K
20
20
90 K
15
15
10
10
0
2
4
6
P (W)
8
0
10
15
20
P (W)
AC07
AC10
Fig.31 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
2000 Oct 20
5
Fig.32 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
19
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
MGB737
MGB736
25
lead
length
(mm)
∆T = 40 K
50 K
60 K
25
lead
length
(mm)
70 K
20
20
15
15
10
0
5
10
15
P (W)
∆T = 40 K
50 K
60 K
70 K
10
20
0
AC15
5
10
15
P (W)
20
AC20
Fig.33 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
Fig.34 Lead length as a function of the dissipation
with the temperature rise at the end of the
lead (soldering spot) as a parameter.
MOUNTING
The resistor is suitable for processing on cutting and bending machines. Ensure that the temperature rise of the resistor
body does not affect nearby components or materials by conducted or convected heat. Figure 26 shows the hot-spot
temperature rise of the resistor body as a function of dissipated power. Figures 27 to 34 show the lead length as a function
of dissipated power and temperature rise.
2000 Oct 20
20
BCcomponents
Product specification
Cemented wirewound resistors
MECHANICAL DATA
Outlines
Mass per 100 units
Table 3
MASS
(g)
TYPE
AC01/03/04/05/07/10/15/20
Resistor type and relevant physical dimensions; see Figs 35 and 36
∅D
MAX.
(mm)
TYPE
L
MAX.
(mm)
∅d
(mm)
b
(mm)
h
(mm)
P
(mm)
S
MAX.
(mm)
∅B
MAX.
(mm)
−
−
−
−
−
1.3
8
2
1.2
AC01
55
AC03
110
AC01
4.3
10
AC04
140
AC03
5.5
13
AC05
220
AC04
5.7
17
AC07
300
AC05
7.5
17
AC10
530
AC07
7.5
25
840
AC10
8
44
−
−
−
−
−
1090
AC15
10
51
−
−
−
−
−
AC20
10
67
−
−
−
−
−
AC15
AC20
0.8 ±0.03
10e
13e
Marking
The resistor is marked with the
nominal resistance value, the
tolerance on the resistance and the
rated dissipation at Tamb = 40 °C.
L
For values up to 910 Ω, the R is used as
the decimal point.
OD
Od
For values of 1 kΩ and upwards, the
letter K is used as the decimal point for
the kΩ indication.
For dimensions see Table 3.
MRA571
Fig.35 Type with straight leads.
E
TY
PE
OD
P 0.5
AN
C
M
AI
Od
NT
EN
L
P 4
2
h 0
2 min
1
5 0
OB
0.1
b
0
S
MLB676
Dimensions in mm.
For dimensions see Table 3.
Available on request for types: AC03, AC04, AC05 and AC07.
Fig.36 Type with cropped and formed leads.
2000 Oct 20
21
P
MLB677
BCcomponents
Product specification
Cemented wirewound resistors
P1 ±0.5
AC01/03/04/05/07/10/15/20
P1 ±0.5
∅D
h+2
Lmax
4.5
(1)
∅d
P2 ±3
+1
0
b1
∅B ±0.07
S
b2
JW29
Dimensions in mm.
For dimensions see Table 4.
∅0.8 to 1.4.
Fig.37 Type with double kink.
Table 4
Resistor type and relevant physical dimensions; see Fig.37
TYPE
LEAD STYLE
∅D
(mm)
L
MAX.
(mm)
b2
(mm)
b1
(mm)
h
(mm)
P1
(mm)
P2
(mm)
S
MAX.
(mm)
∅B
(mm)
AC03
AC04
AC05
double kink
large pitch
0.8 ±0.03
10
1.30
1.65
+0.25/-0.20 +0.25/-0.20
8
25.4
25.4
2
1.0
AC03
AC04
AC05
double kink
small pitch
0.8 ±0.03
10
1.30
2.15
+0.25/-0.20 +0.25/-0.20
8
22.0
20.0
2
1.0
2000 Oct 20
22
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
TESTS AND REQUIREMENTS
In Table 5 the tests and requirements are listed with
reference to the relevant clauses of
“IEC publications 60115-1, 115-4 and 68” ; 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.
Essentially all tests are carried out in accordance with the
schedule of “IEC publications 60115-1 and 60115-4”,
category 40/200/56 (rated temperature range −40 °C to
+200 °C; damp heat, long term, 56 days). The testing also
covers the requirements specified by EIA and EIAJ.
All soldering tests are performed with mildly activated flux.
The tests are carried out in accordance with IEC publication
60 068, “Recommended basic climatic and mechanical
robustness testing procedure for electronic components”
and under standard atmospheric conditions according to
“IEC 60 068-1”, subclause 5.3.
Table 5
Test procedures and requirements
IEC
60068
TEST
METHOD
IEC
60115-1
CLAUSE
TEST
PROCEDURE
REQUIREMENTS
Tests in accordance with the schedule of IEC publication 60115-1
4.15
robustness of
resistor body
load 200 ±10 N
no visible damage
∆R/R max.: ±0.5% + 0.05 Ω
load
R = 6 mm
MBB179
4.16
U
robustness of
terminations:
Ua
tensile all samples
load 10 N; 10 s
Ub
bending half
number of samples
load 5 N 90°, 180°, 90°
Uc
torsion other half of 2 × 180° in opposite directions
samples
2 s; 235 °C; flux 600
no visible damage
∆R/R max.: ±0.5% + 0.05 Ω
4.17
Ta
solderability
4.18
Tb
resistance to soldering thermal shock: 3 s; 350 °C;
heat
2.5 mm from body
4.19
14 (Na)
rapid change of
temperature
30 minutes at −40 °C and
30 minutes at +200 °C; 5 cycles
no visible damage
∆R/R max.: ±1% + 0.05 Ω
4.22
Fc
vibration
frequency 10 to 500 Hz; displacement
0.75 mm or acceleration 10 g;
3 directions; total 6 hours (3 × 2 hours)
no damage
∆R/R max.: ±0.5% + 0.05 Ω
4.20
Eb
bump
4000 ±10 bumps; 390 m/s2
no damage
∆R/R max.: ±0.5% + 0.05 Ω
2000 Oct 20
23
good tinning; no damage
∆R/R max.: ±0.5% + 0.05 Ω
BCcomponents
Product specification
Cemented wirewound resistors
IEC
60068
TEST
METHOD
IEC
60115-1
CLAUSE
4.23
AC01/03/04/05/07/10/15/20
TEST
PROCEDURE
REQUIREMENTS
climatic sequence:
4.23.2
Ba
dry heat
16 hours; 200 °C
4.23.3
Db
damp heat
(accelerated)
1st cycle
24 hours; 55 °C; 95 to 100% RH
4.23.4
Aa
cold
2 hours; −40 °C
4.23.5
M
low air pressure
1 hour; 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/R max.: ±1% + 0.05 Ω
4.24.2
3 (Ca)
damp heat
(steady state)
56 days; 40 °C; 90 to 95% RH;
dissipation ≤0.01 Pn
no visible damage
∆R/R max.: ±1% + 0.05 Ω
temperature
coefficient
at 20/−40/20 °C, 20/200/20 °C:
4.8.4.2
R < 10 Ω
TC ≤ ±600 × 10−6/K
R ≥ 10 Ω
−80 × 10−6 ≤ TC
TC ≤ +140 × 10−6/K
temperature rise
horizontally mounted, loaded with Pn
hot-spot temperature less
than maximum body
temperature
4.13
short time overload
room temperature; dissipation 10 × Pn;
5 s (voltage not more than
1000 V/25 mm)
∆R/R max.: ±2% + 0.1 Ω
4.25.1
endurance (at 40 °C)
1000 hours loaded with Pn;
1.5 hours on and 0.5 hours off
no visible damage
∆R/R max.: ±5% + 0.1 Ω
4.25.1
endurance (at 70 °C)
1000 hours loaded with 0.9Pn;
1.5 hours on and 0.5 hours off
no visible damage
∆R/R max.: ±5% + 0.1 Ω
endurance at upper
category temperature
1000 hours; 200 °C; no load
no visible damage
∆R/R max.: ±5% + 0.1 Ω
4.23.2
27 (Ba)
Other tests in accordance with IEC 60115 clauses and IEC 60 068 test method
45 (Xa)
component solvent
resistance
4.18
20 (Tb)
resistance to soldering 10 s; 260 ±5 °C; flux 600
heat
4.17
20 (Tb)
solderability
(after ageing)
16 hours steam or 16 hours at 155 °C;
2 ±0.5 s in solder at 235 ±5 °C;
flux 600
good tinning (≥95%
covered); no damage
tolerance on
resistance
applied voltage (±10%):
R − Rnom: ±5% max.
4.5
70% 1.1.2 trichlorotrifluoroethane and
30% isopropyl alcohol; H20
no visible damage
4.29
R < 10 Ω: 0.1 V
10 Ω ≤ R < 100 Ω: 0.3 V
100 Ω ≤ R < 1 kΩ: 1 V
1 kΩ ≤ R < 10 kΩ: 3 V
10 kΩ ≤ R ≤ 33 kΩ: 10 V
2000 Oct 20
24
∆R/R max.: ±0.5% + 0.05 Ω