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VPR220, VPR221
Vishay Foil Resistors
FIGURE 2 - TYPICAL TCR CURVE
FIGURE 3 - TRIMMING TO VALUES
(conceptual illustration)
+ 150
+ 100
R
+ 50
Δ R
0
(ppm)
- 50
- 100
Interloop Capacitance
Red u ction in Series
C u rrent Path
Before Trimming
C u rrent Path
- 150
- 200
- 50
- 25
± 2 ppm/°C (+ 25 °C reference)
0 + 20 + 50 + 75 + 100
+ 125
M u t u al Ind u ctance
Red u ction d u e
to Change in
C u rrent Direction
After Trimming
Trimming Process
Remo v es this Material
from Shorting Strip Area
Changing C u rrent Path
- 55
Ambient Temperature (°C)
and Increasing
Resistance
Note: Foil sho w n in b lack, etched spaces in w hite
TABLE 3 - SPECIFICATIONS
Load Life Stability at 2000 h
± 0.05 % max Δ R under full rated
power at + 25 °C
8 W or 3 A (1) on heat sink (2)
FIGURE 4 - VPR220 DIMENSIONS
in inches (millimeters)
Power Rating at + 25 °C
1.5 W or 3 A (1) in free air
Further derating not necessary
0.400 ± 0.010
(10.16 ± 0.25)
0.150 ± 0.008
(3.81 ± 0.2)
0.050 ± 0.005
Current Noise
High Frequency Operation
< 0.010 μV (rms)/V of applied
voltage (- 40 dB)
0.245 ± 0.010
(6.22 ± 0.25)
VISHAY
VPR220
1K0 1 %
0101
0.115 ± 0.005
(2.92 ± 0.13)
0.141 ± 0.005 Dia
(3.58 ± 0.13)
(1.27 ± 0.13)
0.615 Max
(15.62)
Rise time
Inductance (3) (L)
Capacitance (C)
1 ns without ringing
0.1 μH maximum: 0.03 μH typical
1.0 pF maximum: 0.5 pF typical
0.200 ± 0.030
(5.08 ± 0.76)
0.540 ± 0.040
(13.72 ± 1.02)
0.050 ± 0.005
(1.27 ± 0.13)
0.030 ± 0.002
(0.76 ± 0.05)
0.015 ± 0.002
(0.38 ± 0.05)
Voltage Coefficient (4)
Operating Temperature
Range
Maximum Working Voltage
< 0.1 ppm/V
- 55 °C to + 150 °C
300 V. Not to exceed power rating
0.200 ± 0.005
(5.08 ± 0.13)
0.078 ± 0.005
(1.98 ± 0.13)
Thermal
EMF (5)
0.15 μV/°C maximum (lead effect)
FIGURE 5 - VPR221 DIMENSIONS
in inches (millimeters)
Notes
(1)
(2)
Whichever is lower
Heat sink chassis
MIL-R-39009/1B:
dimensions
and
requirements
per
0.400 ± 0.010
(10.16 ± 0.25)
0.245 ± 0.010
(6.22 ± 0.25)
0.115 ± 0.005
(2.92 ± 0.13)
0.150 ± 0.008
(3.81 ± 0.2)
0.050 ± 0.005
(1.27 ± 0.13)
DIMENSION
L
W
H
T
INCHES
6.00
4.00
2.00
0.04
mm
152.4
101.6
50.8
1.0
0.200 ± 0.030
(5.08 ± 0.76)
0.540 ± 0.040
(13.72 ± 1.02)
VISHAY
VPR221
1R0 1 %
0101
0.141 ± 0.005 Dia
(3.58 ± 0.13)
0.050 ± 0.005
(1.27 ± 0.13)
0.030 ± 0.002
(0.76 ± 0.05)
0.615 Max
(15.62)
0.015 ± 0.002
(0.38 ± 0.05)
(3)
(4)
(5)
Inductance (L) due mainly to the leads
The resolution limit of existing test equipment (within the
measurement capability of the equipment, or "essentially zero")
μV/°C relates to EMF due to lead temperature difference
I 1 E 1 E 2 I 2
0.100 ± 0.005
(2.54 ± 0.13)
0.078 ± 0.005
(1.98 ± 0.13)
Surface mount versions of these products are available. See
datasheets for VPR220S, VPR 221S.
www.foilresistors.com
2
For any questions, contact: foil@vishaypg.com
Document Number: 63012
Revision: 23-Mar-10
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