DATA SHEET
Product specification
Supersedes data of 17th November 1998
File under BCcomponents, BC08
2000 Oct 20
BCcomponents
AC01/03/04/05/07/10/15/20
Cemented wirewound resistors
2000 Oct 20
2
BCcomponents
Product specification
Cemented wirewound resistors AC01/03/04/05/07/10/15/20
FEATURES
High power dissipation in
small volume
High pulse load handling
capabilities.
APPLICATIONS
Ballast switching
Shunt in small electric motors
Power supplies.
DESCRIPTION
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.
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
VALUE
AC01
AC03
AC04
AC05
AC07
AC10
AC15
AC20
Resistance range
0.1
=
to
2.4 k
=
0.1
to
5.1 k
0.1
to
6.8 k
0.1
to
10 k
0.1
to
15 k
0.68
to
27 k
0.82
to
39 k
1.2
to
56 k
Resistance tolerance
5%; E24 series
Maximum permissible body temperature
350
C
Rated dissipation at T
amb
= 40
C
1 W
3 W
4 W
5 W
7 W
10 W
15 W
20 W
Rated dissipation at T
amb
= 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
climatic tests
R/R max.:
1% + 0.05
short time overload
R/R max.:
2% + 0.1
2000 Oct 20
3
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
Notes
1. Products with bent leads and loose in box, are available on request.
2. Last 3 digits available on request.
TYPE
ORDERING CODE 23.. ... .....
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...
-
-
-
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
0.1 to 0.91
7
1 to 9.1
8
10 to 91
9
100 to 910
1
1 to 9.1 k
2
10 to 56 k
3
O
RDERING
EXAMPLE
The ordering code of an AC01 resistor,
value 47
, supplied in ammopack of
1000 units is: 2306 328 33479.
Product specifications deviating
from the standard values are available
on request.
2000 Oct 20
4
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
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.
D
ERATING
The power that the resistor can dissipate depends on the operating temperature; see Fig.1.
TYPE
LIMITING VOLTAGE
(1)
(V)
LIMITING POWER
(W)
T
amb
= 40
C
T
amb
= 70
C
AC01
1
0.9
AC03
3
2.5
AC04
4
3.5
AC05
5
4.7
AC07
7
5.8
AC10
10
8.4
AC15
15
12.5
AC20
20
16.0
V
P
n
R
=
Fig.1 Maximum dissipation (P
max
) as a function of the ambient temperature (T
amb
).
40
0
40
70
200
100
90
50
0
Pmax
(%)
T ( C)
amb
o
MRA574
2000 Oct 20
5
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
P
ULSE
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 P
n
.
2. If, contrary to the information above, the applied
peak-voltage and impulse times t
i
are known. Calculate
the pulse-energy (E
p
) in Joules or Wattsec. by the use of
the following formula:
(V
p
= peak voltage; t
i
= impulse-time)
By dividing this result with the R
n
-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 R
n
-value to be used in the application. If this
R
n
-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 P
n
or change the R
n
-value to be used.
Repetitive pulse condition; see Fig.2
With these graphs we can determine the allowed
pulse-energy in Watts depending on the impulse- time t
i
and
the repetition time t
p
of the pulses. The parameter is the
Resistance Value. If the pulse shape is known (impulse-time
t
i
and repetition time t
p
), draw a line vertically from the
X-axis at the mentioned t
i
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 t
p
/t
i
.
If the vertical line from the X-axis crosses the applied t
p
/t
i
before reaching the R-line, this t
p
/t
i
line gives the maximum
allowed pulse-energy at the Y-axis. If the applied
pulse-energy is known (in Watts) and the impulse-time t
i
also, draw a line horizontally from the Y-axis to the crossing
with the pulse-line (t
i
) and find the possible R-value needed
in this application. The horizontal t
p
/t
i
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.
Ep
Vp
2
R
----------
t
i
=
2000 Oct 20
6
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.2
Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC01
1
CCB370
10
-
1
10
-
2
10
-
3
10
-
4
10
-
1
1
10
10
2
10
3
10
4
P
max
(W)
t
i
(s)
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
^
0.1
1
10
100
2 k
Fig.3 Pulse capability; W
s
as a function of R
n
.
AC01
10
3
10
4
10
2
10
1
10
-
1
CCB371
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
pulse
energy
(Ws/
)
R
n
(
)
2000 Oct 20
7
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.4
Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC01
1500
0
500
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB372
1000
t
i
(s)
V
max
(V)
^
Fig.5
Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC03
1
CCB373
10
-
1
10
-
2
10
-
3
10
-
4
10
-
1
1
10
10
2
10
3
10
4
P
max
(W)
t
i
(s)
^
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.1
1
10
110
4.7 k
2000 Oct 20
8
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.6 Pulse capability; W
s
as a function of R
n
.
AC03
10
3
10
4
10
2
10
1
10
-
1
CCB374
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
Fig.7
Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC03
2000
1500
0
500
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB375
1000
t
i
(s)
V
max
(V)
^
2000 Oct 20
9
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.8
Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC04
1
CCB376
10
-
1
10
-
2
10
-
3
10
-
4
10
-
1
1
10
10
2
10
3
10
4
P
max
(W)
t
i
(s)
^
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.1
1
10
100
6.8 k
Fig.9 Pulse capability; W
s
as a function of R
n
.
AC04
10
3
10
4
10
2
10
1
10
-
1
CCB377
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
2000 Oct 20
10
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.10 Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC04
2500
2000
1500
0
500
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB378
1000
t
i
(s)
V
max
(V)
^
Fig.11 Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC05
1
CCB379
10
-
1
10
-
2
10
-
3
10
-
4
10
-
1
1
10
10
2
10
3
10
4
P
max
(W)
t
i
(s)
^
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.1
1.1
11
100
8.2 k
2000 Oct 20
11
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.12 Pulse capability; W
s
as a function of R
n
.
AC05
10
3
10
4
10
2
10
1
10
-
1
CCB380
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
Fig.13 Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC05
2500
2000
1500
0
500
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB381
1000
t
i
(s)
V
max
(V)
^
2000 Oct 20
12
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.14 Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC07
1
CCB382
10
-
1
10
-
2
10
-
3
10
-
4
1
10
10
2
10
3
10
4
P
max
(W)
t
i
(s)
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.1
1
11
100
15 k
Fig.15 Pulse capability; W
s
as a function of R
n
.
AC07
10
3
10
5
10
4
10
2
10
1
10
-
1
CCB383
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
2000 Oct 20
13
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.16 Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC07
5000
4000
3000
0
1000
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB384
2000
t
i
(s)
V
max
(V)
^
Fig.17 Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC10
1
CCB385
10
-
1
10
-
2
10
-
3
10
-
4
1
10
10
2
10
3
10
5
10
4
t
i
(s)
P
max
(W)
^
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.22
2.2
33
240
15 k
2000 Oct 20
14
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.18 Pulse capability; W
s
as a function of R
n
.
AC10
10
3
10
5
10
4
10
2
10
1
10
-
1
CCB386
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
Fig.19 Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC10
5000
4000
3000
0
1000
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB387
2000
t
i
(s)
V
max
(V)
^
2000 Oct 20
15
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.20 Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC15
1
CCB388
10
-
1
10
-
2
10
-
3
10
-
4
1
10
10
2
10
3
10
5
10
4
t
i
(s)
P
max
(W)
^
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.33
4.3
33
330
39 k
Fig.21 Pulse capability; W
s
as a function of R
n
.
AC15
10
3
10
5
10
4
10
2
10
1
10
-
1
CCB389
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
2000 Oct 20
16
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.22 Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC15
7000
6000
5000
4000
3000
0
1000
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB390
2000
t
i
(s)
V
max
(V)
^
Fig.23 Pulse on a regular basis; maximum permissible peak pulse power
as
a function of pulse duration (t
i
).
P
^
max
(
)
AC20
1
CCB391
10
-
1
10
-
2
10
-
3
10
-
4
1
10
10
2
10
3
10
5
10
4
t
i
(s)
P
max
(W)
^
t
p
/t
i
= 1000
t
p
/t
i
= 200
t
p
/t
i
= 50
t
p
/t
i
= 10
t
p
/t
i
= 2
0.47
5.1
47
470
56 k
2000 Oct 20
17
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.24 Pulse capability; W
s
as a function of R
n
.
AC20
10
3
10
5
10
4
10
2
10
1
10
-
1
CCB392
10
3
10
2
10
-
4
10
-
1
10
-
2
10
-
3
10
1
R
n
(
)
pulse
energy
(Ws/
)
Fig.25 Pulse on a regular basis; maximum permissible peak pulse voltage
as
a function of pulse duration (t
i
).
V
^
max
(
)
AC20
10000
8000
6000
0
2000
10
-
6
10
-
5
10
-
4
10
-
3
10
-
2
10
-
1
1
CCB393
4000
t
i
(s)
V
max
(V)
^
2000 Oct 20
18
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Application information
Fig.26 Temperature rise of the resistor body as a function of the dissipation.
MGB730
24
20
350
300
250
200
150
100
50
0
0
4
12
16
8
T at
hot spot
(K)
P (W)
AC01
AC03
AC04
AC05
AC07
AC10
AC15
AC20
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.
0
0.2
0.4
0.6
0.8
1.0
10
15
20
25
P (W)
lead
length
(mm)
MRA573
20 K
30 K
T = 10 K
AC01
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.
0
25
20
15
10
1
2
3
MGB731
P (W)
lead
length
(mm)
60 K
70 K
50 K
T = 40 K
80 K
AC03
2000 Oct 20
19
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
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.
0
25
20
15
10
1
2
4
MGB732
3
P (W)
lead
length
(mm)
50 K
T = 40 K
60 K
70 K
80 K
AC04
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.
0
25
20
15
10
1
5
MGB733
2
3
4
P (W)
lead
length
(mm)
50 K
T = 40 K
60 K
70 K
80 K
90 K
100 K
AC05
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.
0
25
20
15
10
2
4
8
MGB734
6
P (W)
lead
length
(mm)
T = 40 K
80 K
90 K
50 K
60 K
70 K
AC07
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.
AC10
20
25
10
0
5
10
MGB735
20
15
15
P (W)
lead
length
(mm)
50 K
60 K
70 K
80 K
T = 40 K
2000 Oct 20
20
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
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.
20
25
10
0
5
10
MGB736
20
15
15
P (W)
lead
length
(mm)
50 K
60 K
70 K
T = 40 K
AC15
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.
20
25
10
0
5
10
MGB737
20
15
15
P (W)
lead
length
(mm)
50 K
60 K
70 K
T = 40 K
AC20
M
OUNTING
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
21
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
MECHANICAL DATA
Mass per 100 units
Marking
The resistor is marked with the
nominal resistance value, the
tolerance on the resistance and the
rated dissipation at T
amb
= 40
C.
For values up to 910
, the R is used as
the decimal point.
For values of 1 k
and upwards, the
letter K is used as the decimal point for
the k
indication.
TYPE
MASS
(g)
AC01
55
AC03
110
AC04
140
AC05
220
AC07
300
AC10
530
AC15
840
AC20
1090
Outlines
Table 3
Resistor type and relevant physical dimensions; see Figs 35 and 36
TYPE
D
MAX.
(mm)
L
MAX.
(mm)
d
(mm)
b
(mm)
h
(mm)
P
(mm)
S
MAX.
(mm)
B
MAX.
(mm)
AC01
4.3
10
0.8
0.03
-
-
-
-
-
AC03
5.5
13
1.3
8
10e
2
1.2
AC04
5.7
17
AC05
7.5
17
AC07
7.5
25
13e
AC10
8
44
-
-
-
-
-
AC15
10
51
-
-
-
-
-
AC20
10
67
-
-
-
-
-
Fig.35 Type with straight leads.
d
L
D
O
O
MRA571
For dimensions see Table 3.
MLB677
P
5
1
0
B
O
h
2
0
Fig.36 Type with cropped and formed leads.
Dimensions in mm.
For dimensions see Table 3.
Available on request for types: AC03, AC04, AC05 and AC07.
D
O
MLB676
L
P 4
P 0.5
2 min
b
S
0.1
0
d
O
M
A
IN
TE
N
AN
CE
TY
PE
2000 Oct 20
22
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
Fig.37 Type with double kink.
Dimensions in mm.
For dimensions see Table 4.
0.8 to 1.4.
JW29
D
P
1
0.5
P
2
3
S
B
0.07
d
b1
4.5
+
1
0
b2
h
+
2
Lmax
(1)
P
1
0.5
Table 4
Resistor type and relevant physical dimensions; see Fig.37
TYPE
LEAD STYLE
D
(mm)
L
MAX.
(mm)
b
1
(mm)
b
2
(mm)
h
(mm)
P
1
(mm)
P
2
(mm)
S
MAX.
(mm)
B
(mm)
AC03
AC04
AC05
double kink
large pitch
0.8
0.03
10
1.30
+0.25/-0.20
1.65
+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
+0.25/-0.20
2.15
+0.25/-0.20
8
22.0
20.0
2
1.0
2000 Oct 20
23
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
TESTS AND REQUIREMENTS
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.
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.
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.
All soldering tests are performed with mildly activated flux.
Table 5
Test procedures and requirements
IEC
60115-1
CLAUSE
IEC
60068
TEST
METHOD
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
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
samples
2
180
in opposite directions
no visible damage
R/R max.:
0.5% + 0.05
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;
2.5 mm from body
R/R max.:
0.5% + 0.05
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
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
4.20
Eb
bump
4000
10 bumps; 390 m/s
2
no damage
R/R max.:
0.5% + 0.05
R = 6 mm
load
MBB179
2000 Oct 20
24
BCcomponents
Product specification
Cemented wirewound resistors
AC01/03/04/05/07/10/15/20
4.23
climatic sequence:
4.23.2
Ba
dry heat
16 hours; 200
C
4.23.3
Db
damp heat
(accelerated)
1
st
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
4.24.2
3 (Ca)
damp heat
(steady state)
56 days; 40
C; 90 to 95% RH;
dissipation
0.01 P
n
no visible damage
R/R max.:
1% + 0.05
4.8.4.2
temperature
coefficient
at 20/
-
40/20
C, 20/200/20
C:
R < 10
TC
600
10
-
6
/K
R
10
-
80
10
-
6
TC
TC
+140
10
-
6
/K
temperature rise
horizontally mounted, loaded with P
n
hot-spot temperature less
than maximum body
temperature
4.13
short time overload
room temperature; dissipation 10
P
n
;
5 s (voltage not more than
1000 V/25 mm)
R/R max.:
2% + 0.1
4.25.1
endurance (at 40
C)
1000 hours loaded with P
n
;
1.5 hours on and 0.5 hours off
no visible damage
R/R max.:
5% + 0.1
4.25.1
endurance (at 70
C)
1000 hours loaded with 0.9P
n
;
1.5 hours on and 0.5 hours off
no visible damage
R/R max.:
5% + 0.1
4.23.2
27 (Ba)
endurance at upper
category temperature
1000 hours; 200
C; no load
no visible damage
R/R max.:
5% + 0.1
Other tests in accordance with IEC 60115 clauses and IEC 60 068 test method
4.29
45 (Xa)
component solvent
resistance
70% 1.1.2 trichlorotrifluoroethane and
30% isopropyl alcohol; H
2
0
no visible damage
4.18
20 (Tb)
resistance to soldering
heat
10 s; 260
5
C; flux 600
R/R max.:
0.5% + 0.05
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
4.5
tolerance on
resistance
applied voltage (
10%):
R
-
R
nom
:
5% max.
R < 10
: 0.1 V
10
R < 100
: 0.3 V
100
R < 1 k
: 1 V
1 k
R < 10 k
: 3 V
10 k
R
33 k
: 10 V
IEC
60115-1
CLAUSE
IEC
60068
TEST
METHOD
TEST
PROCEDURE
REQUIREMENTS
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