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VPR220, VPR221
Vishay Foil Resistors
Bulk Metal ? Foil Technology Precision Foil Power Resistors
in TO-220 Configuration with TCR of ± 2 ppm/°C ,
Tolerance of to ± 0.01 % and Power Rating to 8 W
FEATURES
? Temperature coefficient of resistance (TCR):
± 2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
? Tolerance: to ± 0.01 % (see tables 1 and 2)
? Electrostatic discharge (ESD): above 25 000
V
Any value at any tolerance within resistance range
Models VPR220 AND VPR221, made from Vishay Bulk
Metal ? Foil, offer low TCR, high stability, tight tolerance and
fast response time in a small, molded resistor. Model
VPR220 is a 2 lead device. Model VPR221 is a 4 lead Kelvin
connected device. The 4 leaded version is highly
recommended for precision applications requiring ohmic
values of 100R or less.
TABLE 1 - VPR220
? Load life stability: ± 0.005 % (25 °C, 2000 h at rated power)
? Resistance range: 0.5 Ω to 10 k Ω
? Power rating: 8 W chassis mounted (per MIL-PRF-39009)
? Non-inductive, non-capacitive design
? Rise time: 1 ns without ringing
? Current noise: < - 40 dB
? Voltage coefficient: < 0.1 ppm/V
? Non inductive: < 0.08 μH
? Non hot spot design
? Thermal EMF: 0.05 μV/°C typical
? Terminal finishes available: lead (Pb)-free or tin/lead alloy
? Any value available within resistance range (e.g. 1K234)
? Prototype samples available from 48 h. For more
RESISTANCE
RANGE ( Ω ) (1)
50 to 10K
25 to < 50
TIGHTEST
TOLERANCE
± 0.01 %
± 0.02 %
TYPICAL
TCR (2)
±2
±2
MAXIMUM
TCR (2)
± 5 ppm/°C
± 7 ppm/°C
information, please contact foil@vishaypg.com
? For better performances, please see VPR220Z and
VPR221Z datasheets
? Compliant to RoHS directive 2002/95/EC
10 to < 25
5 to < 10
weight = 1 g maximum
± 0.05 %
± 0.1 %
±2
±2
± 10 ppm/°C
± 13 ppm/°C
I
I 1
E 1
R
E 2
I 2
I
V
Notes
(1) Lower or high values available upon request
(2) - 55 °C to + 125 °C, + 25 °C ref.
FIGURE 1 - POWER DERATING CURVE
TABLE 2 - VPR221
+ 100
- 55 °C
RESISTANCE
RANGE ( Ω ) (1)
10 to < 500
1 to < 10
0.5 to < 1
TIGHTEST
TOLERANCE
± 0.01 %
± 0.02 %
± 0.05 %
TYPICAL
TCR (2)
± 2 ppm/°C
± 2 ppm/°C
± 2 ppm/°C
MAXIMUM
TCR (2)
± 5 ppm/°C
± 5 ppm/°C
± 5 ppm/°C
+ 75
+ 50
+ 25
weight = 1.2 g maximum
0
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
+ 150
Notes
(1) Lower or high values available upon request
(2) - 55 °C to + 125 °C, + 25 °C Ref.
* Pb containing terminations are not RoHS compliant, exemptions may apply
Ambient Temperature (°C)
Document Number: 63012
Revision: 23-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
1
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