
2001 Jul 13
2
BCcomponents
Product specification
Professional power metal film resistors
PR01/02/03
FEATURES
High power in small packages
Different lead materials for different
applications
Defined interruption behaviour.
APPLICATIONS
All general purpose power
applications.
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
or copper-clad iron are welded to the
end-caps. The resistors are coated with
a red, nonflammable lacquer which
provides electrical, mechanical and
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”
.
QUICK REFERENCE DATA
Notes
1.
2.
1% tolerance is available for R
n
-range from 1R upwards.
2% tolerance is available on request for R
n
-range from 1R upwards.
DESCRIPTION
VALUE
PR01
PR02
PR03
Cu-lead
FeCu-lead
1
to 1 M
Cu-lead
0.68
to 1 M
FeCu-lead
1
to 1 M
Resistance range
Resistance tolerance and series
Maximum dissipation at
T
amb
= 70
°
C:
R < 1
1
≤
R
Thermal resistance (R
th
)
Temperature coefficient
Maximum permissible voltage
(DC or RMS)
Basic specifications
Climatic category (IEC 60068)
Stability after:
load
climatic tests
soldering
0.22
to 1 M
0.33
to 1 M
±
1% (E24, E96 series);
±
5% (E24 series); see notes 1 and 2
0.6 W
1 W
135 K/W
1.2 W
2 W
75 K/W
1.6 W
3 W
60 K/W
1.3 W
115 K/W
2.5 W
75 K/W
≤±
250
×
10
6
/K
350 V
500 V
750 V
IEC 60115-1 and 60115-4
55/155/56
R/R max.:
±
5% + 0.1
R/R max.:
±
3% + 0.1
R/R max.:
±
1% + 0.05