VHP-3 Datasheet, PDF (1/6 Pages) Vishay Siliconix – Bulk Metal® Foil Technology Hermetically Sealed Power and Current Sensing Resistor with TCR of 2 ppm/°C and Power up to 10 Watts

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
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.
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.
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.
Our Application Engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
FEATURES
• Temperature coefficient of resistance TCR:
± 2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see tables 1 and 2)
• Tolerance: to ± 0.01 % (see tables 1 and 2)
• Power rating (heat-sinked): 10 W
Pb-free
Available
RoHS*
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
• Thermal EMF: 0.05 µV/°C typical
• Voltage coefficient: < 0.1 ppm/V
• Non inductive: 0.08 µH
• Non hot spot design
• Terminal finishes available:
VHP-3 and VHP-4:
VPR247:
lead (Pb)-free
tin/lead alloy
gold plated
• Any value available within resistance range (e.g. 1K234)
• Prototype samples available from 48 h. For more
information, please contact [e-mail]
• For better performances, please contact Application
Engineering
TABLE 1 - VHP-3¹⁾ SPECIFICATIONS
TABLE 2 - VHP-4 AND VPR247 SPECIFICATIONS^{1), 2)}
RESISTANCE
RANGE (Ω)
50 to 80K
25 to < 50
10 to < 25
5 to < 10
2 to < 5
1 to < 2
0.5 to < 1
0.25 to < 0.5
0.1 to < 0.25
TIGHTEST
TOLERANCE
± 0.01 %
± 0.02 %
± 0.05 %
± 0.1 %
± 0.25 %
± 0.5 %
± 1.0 %
± 2.0 %
± 5.0 %
TYPICAL
TCR^{3), 4)}
± 2 ppm/°C
MAXIMUM
TCR³⁾
± 5 ppm/°C
± 7 ppm/°C
± 10 ppm/°C
± 13 ppm/°C
± 20 ppm/°C
± 25 ppm/°C
± 50 ppm/°C
RESISTANCE
RANGE (Ω)
10 to 500
5 to < 10
2 to < 5
1 to < 2
0.5 to < 1
0.25 to < 0.5
0.1 to < 0.25
0.05 to < 0.1
TIGHTEST
TOLERANCE
± 0.01 %
± 0.02 %
± 0.05 %
± 0.1 %
± 0.25 %
± 0.5 %
± 1.0 %
± 2.0 %
TYPICAL
TCR^{3), 4)}
± 2 ppm/°C
Notes
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
MAXIMUM
TCR³⁾
± 5 ppm/°C
± 6 ppm/°C
± 8 ppm/°C
± 10 ppm/°C
± 15 ppm/°C
± 20 ppm/°C
± 25 ppm/°C
± 30 ppm/°C
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63005
Revision: 31-Oct-07
For any questions, contact: [e-mail]
www.vishay.com
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