Datasheet S102C (Vishay) - 3

S Series
High Precision Foil Resistor with TCR of ± 2.0 ppm/°C, Vishay Foil Resistors Tolerance of ± 0.005 % and Load Life Stability of ± 0.005 %
FIGURE 3 - POWER DERATING CURVE FIGURE 4 - TRIMMING TO VALUES
(Conceptual Illustration) - 55 °C + 70 °C
200 %
Double Rated Power
175 % + 125 °C 150 %
Current Path
at
Interloop Capacitance Before Trimming Reduction in Series
125 %
Rated Power
Power 100 %
Current Path After Trimming Mutual Inductance
75 %
Reduction due Trimming Process
Rated
Safe operation to Change in Removes this Material
of
for < 150 ppm
50 %
from Shorting Strip Area ∆R after 2000 Current Direction Changing Current Path hours load-life. and Increasing
25 %
Resistance
Percent 0 - 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200 Ambient Temperature (
°
C) Note:
Foil shown in black, etched spaces in white
TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON MIL-PRF-55182 S-SERIES S-SERIES CHAR J MAXIMUM
Δ
R TYPICAL
Δ
R Test Group I
Thermal shock, 5 x (- 65 °C to + 150 °C) ± 0.2 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm) Short time overload, 6.25 x rated power ± 0.2 % ± 0.01 % (100 ppm) ± 0.003 % (30 ppm)
Test Group II
Resistance temperature characteristics ± 25 ppm/°C ± 4.5 ppm/°C ± 2.0 ppm/°C Characteristic Low temperature storage (24 h at - 65 °C) ± 0.15 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm) Low temperature operation ± 0.15 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm) (45 min, rated power at - 65 °C) Terminal strength ± 0.2 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm)
Test Group III
DWV ± 0.15 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm) Resistance to solder heat ± 0.1 % ± 0.01 % (100 ppm) ± 0.005 % (50 ppm) Moisture resistance ± 0.4 % ± 0.05 % (500 ppm) ± 0.01 % (100 ppm)
Test Group IV
Shock ± 0.2 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm) Vibration ± 0.2 % ± 0.01 % (100 ppm) ± 0.002 % (20 ppm)
Test Group V
Life test at 0.3 W/+ 125 °C 2000 h ± 0.5 % ± 0.015 % (150 ppm) ± 0.01 % (100 ppm) 10 000 h ± 2.0 % ± 0.05 % (500 ppm) ± 0.03 % (300 ppm)
Test Group Va
Life test at 0.6 W (2 x rated power)/+ 70 °C, 2000 h ± 0.5 % ± 0.015 % (150 ppm) ± 0.01 % (100 ppm)
Test Group VI
High temperature exposure (2000 h at + 175 °C) ± 2.0 % ± 0.1 % (1000 ppm) ± 0.05 % (500 ppm)
Test Group VII
Voltage coefficient 5 ppm/V < 0.1 ppm/V < 0.1 ppm/V Document Number: 63001 For any questions, contact: foil@vishay.com www.vishay.com Revision: 20-Nov-07 3 Document Outline Datasheet Disclaimer