1773265 Datasheet, PDF (1/2 Pages) Tyco Electronics – Precision Metal Film Fixed Resistors

Precision Metal Film Fixed Resistors
Type R Series
Type R Series
Characteristics -
Electrical
YR8 ER8 CR8 YR1 ER1 CR1 YR2 ER2 CR2
Rated Power @ 70 °C (W)
0.125
0.25
0.5
Resistance Range (ohms) Min
51R1
10R
10R
Max
511K
1M0
1M0
Tolerance (%)
0.1
0.25
0.5
Code Letter
B
C
D
Temperature Coefficient (ppm/°C) ± 15 ± 25 ± 50 ± 15 ± 25 ± 50 ± 15 ± 25 ± 50
Selection Series
E96
Limiting Element Voltage - Nominal (V)
200
250
350
The resistive element comprises a thin
Maximum Overload Voltage (V)
400
500
700
film of nickel-chrome alloy evaporated
Operating Temperature Range (°C)
-65 to +155
onto a high thermal conductivity
Dielectric Strength (V)
500
ceramic element. Metal end caps are
Insulation Resistance Min Dry (Mohms)
10,000
force fitted to the element prior to
Voltage Coefficient Max (ppm/V)
5
spiralling to value. Tinned copper lead
wires are welded to the end caps and
the components are then coated. One
Dimensions
coat of phenolic resin is followed by
three coats of epoxy resin. All resistors
are tested for value and tolerance.
Key Features
I Precision metal film resistors
with tolerance to 0.1% and
temperature coefficients to
15ppm.
I Metal film resistors have
excellent stability under load
and severe environmental
conditions. They exhibit very
low noise current and voltage
coefficients. Precision metal
film resistors are particularly
suitable in all applications
where long-term stability is
important.
Derating Curve
Style
R8
R1
L*
3.3 ± 0.1
6.3 ± 0.3
D
1.7 ± 0.2
2.3 ± 0.2
d nom
0.45
0.6
R2
9.5 ± 0.5 3.5 ± 0.5
0.6
* Length is measured in accordance with IEC 294
100
80
60
40
20
0
40 60 70 80 100 120 140 160
Ambient Temperature (°C)
Surface Temperature Vs Load
40
30
20
10
0
0
20 40 60 80 100
Percent Rated Power
Literature No. 1773265
Issued: 04-05
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres Specifications subject to
unless otherwise specified. change.
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