VPR220S_08 Datasheet, PDF (2/5 Pages) Vishay Siliconix – Foil Technology Precision Foil Power Surface Mount Resistors in TO-220 Configuration with TCR of ± 2 ppm/°C,

VPR220S, VPR221S
Vishay Foil Resistors ^{Bulk Metal® Foil Technology Precision Foil Power Surface}
Mount Resistors in TO-220 Configuration with TCR of
± 2 ppm/°C, Tolerance of to ± 0.01 % and Power Rating to 8 W
FIGURE 2 - TYPICAL TCR CURVE
FIGURE 3 - TRIMMING TO VALUES
(Conceptual Illustration)
+ 150
+ 100
+ 50
ΔR
R⁰
(ppm)
- 50
- 100
- 150
- 200
- 50
- 55
± 2 ppm/°C (+ 25 °C Reference)
- 25
0 + 20 + 50 + 75 + 100 + 125
Ambient Temperature (°C)
Interloop Capacitance
Reduction in Series
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Note: Foil shown in black, etched spaces in white
TABLE 3 - SPECIFICATIONS
Load Life Stability at 2000 h
Power Rating at + 25 °C
Current Noise
High Frequency Operation
Rise time
Inductance³⁾ (L)
Capacitance (C)
Voltage Coefficient⁴⁾
Operating Temperature Range
Maximum Working Voltage
Thermal EMF⁵⁾
± 0.05 % max. ΔR under full rated power at + 25 °C
8 W or 3 A¹⁾ on heat sink²⁾
1.5 W or 3 A¹⁾ in free air
Further derating not necessary
< 0.010 µV (rms)/V of applied voltage (- 40 dB)
1 ns without ringing
0.1 µH maximum: 0.03 µH typical
1.0 pF maximum: 0.5 pF typical
< 0.1 ppm/V
- 55 °C to + 150 °C
300 V. Not to exceed power rating
0.15 µV/°C maximum (lead effect)
Notes
1. Whichever is lower
2. Heat sink chassis dimensions and requirements per MIL-R-39009/1B:
DIMENSION
L
W
H
T
INCHES
6.00
4.00
2.00
0.04
mm
152.4
101.6
50.8
1.0
3. Inductance (L) due mainly to the leads
4. The resolution limit of existing test equipment (within the measurement capability of the equipment, or “essentially zero”)
5. µV/°C relates to EMF due to lead temperature difference
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Document Number: 63050
Revision: 29-Feb-08