303144, 303145
Vishay Foil Resistors
Models # 303144 and 303145 - Fixed Resistors CSM2512 and CSM3637
with Screen/Test Flow in Compliance with EEE-INST-002 (Tables 2A
and 3A, Film/Foil, Level 1) MIL-PRF-55342 and MIL-PRF-49465
FEATURES
• Temperature coefficient: ± 20 ppm/°C max.
(- 55 °C to + 125 °C, + 25 °C ref.) (see Table 1)
• Surface mount configuration
• Four terminal (Kelvin) design: allows for precision accurate
measurements
• Power rating: 1 W to 3 W
• Resistance tolerance: ± 0.5 %
• Resistance range: 2 mΩ to 200 mΩ
• Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 2.345 mΩ vs. 2 mΩ)
• Short time overload: 0.1 %
• Thermal EMF: 3 µV/°C
303144 and 303145 are low value current sense resistors,
providing power and precision in a four terminal, surface
mount configuration. Its all welded construction is made up
of a Bulk Metal® resistive element with plated copper
terminations.
• Maximum current: up to 38 A
• Terminal finish: tin/lead alloy
• For prototype units, append a “U” to the model number
(example: 303144U). These units have all of the table 2A
(page 3) 100 % tests performed, with no destructive
qualification testing required (table 3A, page 3). For more
information, please contact foil@vishaypg.com
The four terminal devices separate the current leads from
the voltage sensing leads. This configuration eliminates the
effect of the lead wire resistance from points A to B and C
to D.
Vishay Foil Resistors' application engineering department is
available to advise and make recommendations.
• For oriented performances please contact Application
Engineering
B
C
FIGURE 1 - POWER DERATING CURVE
R
+ 70 °C
I
I
100
80
60
40
20
0
A
D
V
~
=
Zin
∞
- 65 - 50 - 25
0
25
50
75
100 125 150 170
Ambient Temperature (°C)
TABLE 1 - SPECIFICATIONS
PARAMETER
303144
303145
Resistance Range
3 mΩ to 200 mΩ
2 mΩ to 200 mΩ
3 W ( 2 mΩ to 10 mΩ)
2 W (> 10 mΩ to 200 mΩ)
Power Rating at 70 °C
1 W
Maximum Current
Tightest Tolerance
18 A
38 A
± 0.5 %
± 25 ppm/°C (2 mΩ to ≤ 3 mΩ)
± 25 ppm/°C (100 mΩ to 200 mΩ)
± 20 ppm/°C (> 3 mΩ to < 100 mΩ)
Temperature Coefficient Max.
(- 55 °C to + 125 °C, + 25 °C ref.)
± 20 ppm/°C (3 mΩ to < 100 mΩ)
± 25 ppm/°C (100 mΩ to 200 mΩ)
Operating Temperature Range
Weight (maximum)
- 55 °C to + 125 °C, ref. + 25 °C
0.09 g
0.29 g
Document Number: 63166
Revision: 2-May-11
For any questions, contact: foil@vishaypg.com
www.vishayfoilresistors.com
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