Product specification
Supersedes data of 8th March 2001
File under BCcomponents, BC08
2001 Jul 13
BCcomponentsProduct specification
Professional power metal film resistorsPR01/02/03
FEATURES
• High power in small packages
• Different lead materials for different
applications
• Defined interruption behaviour.
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 wires of electrolytic copper
climatic protection. This coating is not
resistant to aggressive fluxes. The
encapsulation is resistant to all
cleaning solvents in accordance with
“MIL-STD-202E, method 215”, and
“IEC 60068-2-45”.
or copper-clad iron are welded to the
APPLICATIONS
• All general purpose power
applications.
end-caps. The resistors are coated with
a red, nonflammable lacquer which
provides electrical, mechanical and
QUICK REFERENCE DATA
VALUE
DESCRIPTION
Resistance range0.22
PR01
Cu-lead FeCu-lead Cu-lead FeCu-lead
Ω to 1 MΩ 0.33 Ω to 1 MΩ 1 Ω to 1 MΩ 0.68 Ω to 1 MΩ 1 Ω to 1 MΩ
PR02PR03
Resistance tolerance and series±1% (E24, E96 series); ±5% (E24 series); see notes 1 and 2
1000 units500 units1000 units500 units1000 units500 units
PITCH = 25.4
(mm)
PITCH = 17.8
(mm)
PITCH = 25.4
(mm)
PITCH
(1)(2)(3)
22 193 33... −22 193 03...−−−
(1)
22 194 33...
22 194 73...
−22 195 33...−22 195 23...−−
−22 194 23...−−−
−22 194 83...−−−
(2)
−
−
(3)
Notes
1. PR01 pitch 12.5 mm.
2. PR02 pitch 15.0 mm.
3. PR03 pitch 20.0 mm.
2001 Jul 133
BCcomponentsProduct specification
Professional power metal film resistorsPR01/02/03
Ordering code (12NC)
• The resistors have a 12-digit
ordering code starting with 23.
• The first 7 digits indicate the resistor
type and packaging;
see Tables 1 and 2.
• 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
Table 3 Last digit of 12NC
RESISTANCE
DECADE
0.22 to 0.91
1to9.76
10 to 97.6
100 to 976
1to9.76k
10 to 97.6 k
100 to 976 k
Ω5
1M
Ω1
LAST DIGIT
Ω7
Ω8
Ω9
Ω2
Ω3
Ω4
Ordering example
The ordering code for resistor type
PR02 with Cu leads and a value of
Ω, supplied on a bandolier of
750
1000 units in ammopack, is:
2322 194 13751.
with Table 3.
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of
The values of the E24 series are in accordance with “IEC publication 60 063”.
T =
amb
(W)
1.00
P
0.75
0.50
0.25
±5%.
40 C
o
70 C
o
100 C
125 C
155 C
o
o
o
o
205 C
o
T ( C)
m
1 k
Ω
30 k
100000 h
10000 h
1000 h
105.02.01.00.50.2 0.1 %
PR01
∆ R
30 k
Ω
Ω
MLB660
Fig.1 Drift nomogram.
2001 Jul 134
BCcomponentsProduct specification
Professional power metal film resistorsPR01/02/03
100000 h
10000 h
1000 h
105.02.01.00.50.2 0.1 %
PR02
2.00
P
(W)
1.50
1.00
0.50
∆ R
Fig.2 Drift nomogram.
39 k
T =
39 k
Ω
amb
1 k
Ω
o
40 C
T ( C)
m
Ω
o
70 C
o
100 C
o
125 C
o
155 C
o
220 C
o
MLB683
2001 Jul 135
BCcomponentsProduct specification
Professional power metal film resistorsPR01/02/03
100000 h
10000 h
1000 h
105.02.01.00.50.2 0.1 %
PR03
3.00
P
(W)
2.25
1.50
0.75
∆ R
Fig.3 Drift nomogram.
51 k
51 kΩ
1 kΩ
Ω
T =
amb
40 C70 C
o
T ( C)
m
MLB693
oo
100 C
125 C
155 C
250 C
o
o
o
o
2001 Jul 136
BCcomponentsProduct specification
Professional power metal film resistorsPR01/02/03
Limiting values
(1)
TYPELEAD MATERIALRANGE
PR01Cu
PR02
Cu
FeCu1
PR03
Cu
FeCu1
Ω
R<1
Ω≤R1.0
1
Ω
R<1
1 Ω≤R2.0
Ω≤R1.3
Ω
R<1
1 Ω≤R3.0
Ω≤R2.5
LIMITING VOLTAGE
(V)
350
500
750
Note
1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”.
LIMITING POWER
(W)
0.6
1.2
1.6
The maximum permissible hot-spot temperature is 205
ERATING
D
°C for PR01, 220 °C for PR02 and 250 °C for PR03.
The power that the resistor can dissipate depends on the operating temperature; see Fig.4.
CCB412
10050
155
T
(°C)
amb
Fig.4 Maximum dissipation (P
P
max
(%P
)
rated
100
50
0
−55
) in percentage of rated power as a function of the ambient temperature (T
max
0
70
amb
).
2001 Jul 137
BCcomponentsProduct specification
Professional power metal film resistorsPR01/02/03
PULSELOADINGCAPABILITIES
PR01
ti (s)
MLB738
1
MLB737
3
10
ˆ
P
max
(W)
2
10
10
1
−1
10
−6
10
1200
V
max
(V)
1000
tp/ti = 1000
Fig.5 Pulse on a regular basis; maximum permissible peak pulse power as
a function of pulse duration (t
500
200
100
50
20
10
5
2
−5
10
−4
10
−3
10
).
i
−2
10
−1
10
ˆ
P
()
max
800
600
400
200
0
PR01
6
10
Fig.6 Pulse on a regular basis; maximum permissible peak pulse voltage as
5
10
4
10
a function of pulse duration (t
3
10
).
i
2
10
1
10
ˆ
()
V
max
ti(s)
1
2001 Jul 138
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