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)
•
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
Any value available within resistance range
Foil power resistors offer the best
Vishay Bulk
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.
Metal
®
•
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 foil@vishay.com
•
For better performances, please contact Application
Engineering
TABLE 1 - VHP-3
1)
SPECIFICATIONS
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 %
± 50 ppm/°C
± 2 ppm/°C
TYPICAL
TCR
3), 4)
MAXIMUM
TCR
3)
± 5 ppm/°C
± 7 ppm/°C
± 10 ppm/°C
± 13 ppm/°C
± 20 ppm/°C
± 25 ppm/°C
TABLE 2 - VHP-4 AND VPR247 SPECIFICATIONS
1), 2)
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 %
± 2 ppm/°C
TYPICAL
TCR
3), 4)
MAXIMUM
TCR
3)
± 5 ppm/°C
± 6 ppm/°C
± 8 ppm/°C
± 10 ppm/°C
± 15 ppm/°C
± 20 ppm/°C
± 25 ppm/°C
± 30 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
* 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
1
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
TABLE 3 - GENERAL SPECIFICATIONS
Stability
Load life 2000 h
Shelf life
Power Rating
At + 25 °C (see Fig. 1)
Current Noise
High Frequency Operation
Rise time
Inductance
(L)
3)
Capacitance (C)
Voltage Coefficient
Operating Temperature Range
Hermeticity
Maximum Working Voltage
7)
Thermal EMF
8)
1.0 ns at 1 kΩ without ringing
0.1 µH maximum; 0.08 µH typical
1.0 pF maximum; 0.5 pF typical
< 0.1 ppm/V
- 55 °C to + 150 °C
10
-7
Atmospheric cc/s maximum
600 V
0.1 µV/°C maximum (lead effect)
2.5 µV/W maximum (power effect)
10 W or 3 A - heat sink
2)
3 W or 3 A - free air
< 0.010 µV (RMS)/V of applied voltage
(- 40 dB)
± 0.05 % maximum
ΔR,
3 W in still air at + 25 °C
± 0.05 % maximum
ΔR
under full rated power
(10 W at + 25 °C on heat sink)
± 0.0005 % (5 ppm) maximum
ΔR/year
FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power
+ 100
+ 75
+ 50
+ 25
0
- 75 - 50 - 25
- 55 °C
Rated Power
FIGURE 2 - KELVIN CONNECTION
I
1
r
1
R
r
2
I
2
r
3
I
m
r
4
0
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175
r
5
Ambient Temperature (°C)
∞
Kelvin (4-terminal) connections are used for these low ohmic value products to measure a precise voltage drop across the
resistive element. In these applications the contact resistance, lead resistance, and their TCR effect may be greater than that of
the element itself and could cause significant errors if the standard 2-terminal connection is used. Figure 2 shows a high
impedance measurement system where r
5
approaches infinity and I
m
approaches zero resulting in negligible IR drop through r
3
and r
4
which negates their lead resistance and TCR effect. With the voltage sense leads E
1
and E
2
inside of r
1
and r
2
the
resistance and TCR effect of the current leads, I
1
and I
2
are negated and only the resistance and TCR of the element R are
sensed. This method of measurement is essential for precise current sensing.
FIGURE 3 - VHP-3, VHP-4 STANDARD IMPRINTING AND DIMENSIONS
in inches (millimeters)
VHP-3
Mounting
Hole
VHP-4 (4 terminal)
Mounting
Hole
0.665 (16.89)
± 0.005 (± 0.13)
1.186 (30.13)
± 0.005 (± 0.13)
1.530 (38.86)
± 0.005 (± 0.13)
0.665 (16.89)
± 0.005 (± 0.13)
1.186 (30.13)
± 0.005 (± 0.13)
1.530 (38.86)
± 0.005 (± 0.13)
I1
I2
TO-3 Cap
TO-3 Base
0.040 (1.00) Dia.
± 0.005 (± 0.13)
0.43 (10.92)
± 0.01 (± 0.25)
1.00 (25.4)
± 0.005 (± 0.13)
0.770 (19.56)
Max. Dia.
0.266 (6.76)
± 0.005 (± 0.13)
0.335 (8.51)
± 0.005 (± 0.13)
Standard Marking
Arrangement
Print Spec
Model Number
VISHAY
VHP-3T
12K500
0.1
%
B0729
0.45 (11.43)
Min.
Resistance
Value
Tolerance
Date Code
B 07
29
Year Week
0.156 dia (3.9)
± 0.005 (± 0.13)
0.222
(5.64)
E1
E2
I1
E1
E2
I2
0.156 Dia. (3.9)
± 0.005 (± 0.13)
Case not active; insulators not required; mounting hardware not supplied.
www.vishay.com
2
For any questions, contact: foil@vishay.com
Document Number: 63005
Revision: 31-Oct-07
VHP-3, VHP-4, VPR247
Bulk Metal
®
Foil Technology
Vishay Foil Resistors
Hermetically Sealed Power and Current Sensing Resistor
with TCR of 2 ppm/°C and Power up to 10 Watts
FIGURE 4 - VPR247 STANDARD IMPRINTING AND DIMENSIONS
B
L
C
VISHAY
VPR247
XXXX
0R2000 1 %
0.140 ± 0.005
(Dia. Thru Hole)
W
H
0.010 Max.
Sleeve Extension
Date Code
07
10
Year Week
Tolerance
Resistance
Value
LL
I
1
E
1
E
2
I
2
S
LS
Gold Plated
Copper Leads
0.025 Dia.
A
DIMENSION
L
H
W
LL
LS
S
A
B
C
INCHES
0.690 ± 0.005
0.820 ± 0.005
0.215 ± 0.005
0.500 minimum
0.100 ± 0.005
0.200 ± 0.005
0.120 ± 0.005
0.040 ± 0.005
0.120 ± 0.005
MM
17.53 ± 0.13
20.83 ± 0.13
5.46 ± 0.13
12.70 minimum
2.54 ± 0.13
5.08 ± 0.13
3.05 ± 0.13
1.02 ± 0.13
3.05 ± 0.13
FIGURE 5 - TYPICAL TCR CURVE
+ 150
+ 100
FIGURE 6 - TRIMMING TO VALUES
Δ
R
+ 50
0
- 50
R
(ppm)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
- 100
- 150
- 200
- 50
- 55
- 25
0
+ 20
+ 50
+ 75
+ 100
+ 125
± 2 ppm/°C (+ 25 °C Reference)
Mutual Inductance
Reduction due
to Change in
Current Direction
Ambient Temperature (°C)
Note:
Foil shown in
black,
etched spaces in
white
(For more details, see tables 1 and 2)
Document Number: 63005
Revision: 31-Oct-07
For any questions, contact: foil@vishay.com
www.vishay.com
3
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
METHOD
PARAGRAPH
6)
Test Group I
Conditioning
Test Group II
Resistance temperature
Characteristic
(- 55 °C to + 125 °C)
4.8.4
<1
Ω
± 100 ppm/°C;
1
Ω
to 19.6
Ω:
± 50 ppm/°C;
≥
20
Ω:
± 30 ppm/°C
Low temperature storage
DWV
(300 V at atmospheric pressure)
Insulation resistance
Low temperature operation
Short time overload
8)
(5 s at 15 W)
Moisture resistance
Terminal strength
Test Group III
Shock - specified pulse
(Post-test DWV at 300 V)
Vibration - high frequency
(Post-test DWV at 300 V)
Test Group IV
Life test
10 W at 25 °C for 2000 h
80 % power at + 70 °C
for 2000 h
Test Group V
High temperature exposure
2000 h at + 150 °C
Notes
1. Whichever is lower.
2. Heat sink chassis
MIL-PRF-39009/1:
dimensions
and
requirements
per
4. The resolution limit of existing test equipment (within the
measurement capability of the equipment, or “essentially zero”).
5. Not to exceed power rating of resistor.
MM
152.4
101.6
50.8
1.0
6. Vishay test data as compared to MIL-PRF-39009 is shown for
illustration purposes, Vishay test conditions that deviate from the
Mil test method are noted within parentheses.
7. Maximum ambient temperature rating is + 150 °C.
8. Maximum overload rating is 15 W (5 x rated power in free air;
1.5 x rated power on heatsink), with applied voltage not to
exceed 750 V.
9.
ΔR’s
are as shown plus 0.001
Ω
to allow for measurement errors
at low resistance values.
4.8.14
± 1.0 % + 0.05
Ω
± 0.05 %
-
-
± 0.04 %
4.8.13
± 1.0 % + 0.01
Ω
± 0.01 %
4.8.12
± 0.2 % + 0.01
Ω
± 0.005 %
4.8.11
± 0.2 % + 0.01
Ω
± 0.005 %
4.8.8
4.8.9
4.8.10
± 0.3 % + 0.01
Ω
± 0.5 % + 0.01
Ω
± 0.2 % + 0.01
Ω
± 0.03 %
± 0.02 %
± 0.005 %
4.8.5
4.8.6
4.8.7
± 0.2 % + 0.01
Ω
10
4
MΩ
± 0.3 % + 0.01
Ω
± 0.005 %
> 10
4
MΩ
± 0.01 %
4.8.16
± 0.3 % + 0.01
Ω
± 0.005 %
See tables 1 and 2, page 1
4.8.2
± 0.2 % + 0.01
Ω
± 0.03 %
MIL-PRF-39009
ΔR
LIMITS
VHP-3, VHP-4 AND VPR247
TYPICAL
ΔR
TEST DATA
9)
TABLE 4 - ENVIRONMENTAL PERFORMANCE
INCHES
L
W
H
T
6.00
4.00
2.00
0.04
3. Inductance (L) due mainly to the leads.
www.vishay.com
4
For any questions, contact: foil@vishay.com
Document Number: 63005
Revision: 31-Oct-07
VHP-3, VHP-4, VPR247
Bulk Metal
®
Foil Technology
Vishay Foil Resistors
Hermetically Sealed Power and Current Sensing Resistor
with TCR of 2 ppm/°C and Power up to 10 Watts
TABLE 5 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y0065500R000T9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= kΩ
AER*
0
= standard
9
= lead (Pb)-free
1 - 999
= custom
Y
0
0
6
5
5
0
0
R
0
0
0
T
9
L
PRODUCT CODE
0065
= VHP-3
0066
= VHP-4
0830
= VPR247
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
PACKAGING
L
= bulk pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0065 500R000 T 9 L:
TYPE: VHP-3
VALUE: 500.0
Ω
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
HISTORICAL PART NUMBER: VHP-3T 500R00 T B (will continue to be used)
VHP-3
MODEL
VHP-3
VHP-4
VPR247
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
500R00
OHMIC VALUE
500
Ω
T
RESISTANCE
TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
B
PACKAGING
B
= bulk pack
Note
* For non-standard requests, please contact Application Engineering.
Document Number: 63005
Revision: 31-Oct-07
For any questions, contact: foil@vishay.com
www.vishay.com
5
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