VHP-3, VHP-4, VPR247
Vishay Foil Resistors
Bulk Metal® Foil Technology
Hermetically Sealed Power and Current Sensing Resistor with
TCR of 2 ppm/°C and Power up to 10 Watts
FEATURES
• Temperature coefficient of resistance TCR:
2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see tables 1 and 2)
Pb-free
Available
RoHS*
• Tolerance: to 0.01 % (see tables 1 and 2)
• Power rating (heat-sinked): 10 W
COMPLIANT
• Load life stability: 0.01 % at 25 °C, 2000 h at rated power
• Resistance range: 0.05 Ω to 80 kΩ
• Electrostatic discharge (ESD) above 25 000 V
• Non inductive, non capacitive design
• Rise time: 1.0 ns without ringing
• Current noise: < - 40 dB
Any value available within resistance range
Vishay Bulk Metal® Foil power resistors offer the best
approach to low value power and current sensing when a
combination of accuracy, tight TCR, low thermal EMF, low
voltage coefficient, Kelvin connection, and long term stability
(under power) are required.
• Thermal EMF: 0.05 µV/°C typical
• Voltage coefficient: < 0.1 ppm/V
• Non inductive: 0.08 µH
Vishay Models VHP-3 and VHP-4 offer all welded
construction and screw mounting directly to a metal heat sink
for maximum heat transfer. Hermetic sealing and nitrogen
back fill provide the maximum protection against
environmental stresses, thereby ensuring long term stability.
A special feature of this construction is Kovar eyelet’s and
OFHC solder plated copper leads providing the lowest
thermal EMFs in the industry.
• Non hot spot design
• Terminal finishes available:
VHP-3 and VHP-4:
lead (Pb)-free
tin/lead alloy
gold plated
VPR247:
Vishay Model VPR247 has many of the advantages of the
VHP-4 but with significantly reduced size and weight. It also
has gold plated copper leads.
• Any value available within resistance range (e.g. 1K234)
• Prototype samples available from 48 h. For more
information, please contact foil@vishay.com
Our Application Engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
• For better performances, please contact Application
Engineering
1), 2)
TABLE 1 - VHP-31) SPECIFICATIONS
TABLE 2 - VHP-4 AND VPR247 SPECIFICATIONS
RESISTANCE
RANGE (Ω)
TIGHTEST
TOLERANCE
TYPICAL
MAXIMUM
RESISTANCE
RANGE (Ω)
TIGHTEST
TOLERANCE
TYPICAL
MAXIMUM
TCR3), 4)
TCR3)
TCR3), 4)
TCR3)
10 to 500
5 to < 10
0.01 %
0.02 %
0.05 %
0.1 %
5 ppm/°C
6 ppm/°C
8 ppm/°C
10 ppm/°C
15 ppm/°C
20 ppm/°C
25 ppm/°C
30 ppm/°C
50 to 80K
25 to < 50
10 to < 25
5 to < 10
0.01 %
0.02 %
0.05 %
0.1 %
0.25 %
0.5 %
1.0 %
2.0 %
5.0 %
5 ppm/°C
7 ppm/°C
10 ppm/°C
13 ppm/°C
20 ppm/°C
25 ppm/°C
2 to < 5
1 to < 2
2 ppm/°C
0.5 to < 1
0.25 to < 0.5
0.1 to < 0.25
0.05 to < 0.1
0.25 %
0.5 %
2 to < 5
2 ppm/°C
1.0 %
1 to < 2
2.0 %
0.5 to < 1
0.25 to < 0.5
0.1 to < 0.25
Notes
50 ppm/°C
1. Weight of VHP-3 and VHP-4 = 15 g maximum
VPR247 = 7 g maximum
2. Available up to 500 Ω
3. - 55 °C to + 125 °C, + 25 °C ref.
4. See figure 5
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63005
Revision: 31-Oct-07
For any questions, contact: foil@vishay.com
www.vishay.com
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