VPR5Z, VPR7Z
Vishay Foil Resistors
Ultra High Precision Bulk Metal
®
Z-Foil Technology
Power Current Sensing Resistors with TCR of ± 0.05 ppm/°C
and Power Rating up to 7 W
FEATURES
NEW
•
Temperature coefficient of resistance (TCR):
± 0.05 ppm/°C (0 °C to 60 °C)
± 0.2 ppm/°C (- 55 °C to + 125 °C, + 25 °C ref.)
•
Tolerance: ± 0.01 %
•
Resistance range: 5
Ω
to 100 KΩ
•
Vishay Foil Resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
•
Load life stability: ± 0.01 % (100 ppm) at 70 °C, 2000 h at
rated power
•
Electrostatic discharge (ESD) up to 25 000 V
•
Non-inductive, non-capacitive design
•
Rise time: 1 ns effectively no ringing
•
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
•
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
•
Thermal EMF: 0.05 µV/°C typical
•
Voltage coefficient: < 0.1 ppm/V
•
Non-inductive: < 0.08 µH
•
Pattern design minimizing hot spots
•
Terminal finish available: lead (Pb)-free or tin/lead alloy*
•
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
INTRODUCTION
These Bulk Metal
®
Z-Foil power current sensing resistors are
direct replacements for certain wirewound devices but
without the inductive characteristics of wirewounds. The
anodized aluminum housing is drilled and countersunk to
accept flat head screws for thermal mounting. Because the
device is internally Kelvin connected, there is no restriction
on the lead lengths as would be the case if this were a two
terminal device. Frequently used in YIG oscillator circuits
these devices contribute to superior frequency stability.
TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE
MODEL
NUMBER
RESISTANCE
RANGE
(Ω)
5 to 10
VPR5Z
> 10 to 50
> 50 to 100
> 100 to 100K
5 to 10
VPR7Z
> 10 to 50
> 50 to 100
> 100 to 100K
BEST
TOLERANCE
(%)
± 0.1
± 0.05
± 0.05
± 0.01
± 0.1
± 0.05
± 0.05
± 0.01
TYPICAL TCR AND MAXIMUM SPREAD
(- 55 °C to + 125 °C, + 25 °C ref.)
(ppm/°C)
± 0.2 ± 4.3
± 0.2 ± 3.8
± 0.2 ± 2.8
± 0.2 ± 1.8
± 0.2 ± 4.3
± 0.2 ± 3.8
± 0.2 ± 2.8
± 0.2 ± 1.8
300
7
300
5
MAXIMUM WORKING
VOLTAGE
(V)
POWER RATING
AT 25 °C
(1)
(W)
Note
(1)
Mounted on aluminum chassis (6" L x 4" W x 2" H x 0.040" Th) per MIL-PRF-39009/1B.
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63188
Revision: 22-Jul-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
VPR5Z, VPR7Z
Vishay Foil Resistors
FIGURE 1 - POWER DERATING CURVE
100
Rated Power (%)
75
50
25
0
- 50
0
+ 25 + 50
+ 100
+ 150
- 55
Ambient Temperature (°C)
FIGURE 2 - TRIMMING TO VALUES
(conceptual illustration)
FIGURE 3 - TYPICAL RESISTANCE/
TEMPERATURE CURVE (Z-FOIL)
+ 500
+ 400
Interloop
Capacitance
Reduction
in Series
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
- 0.16 ppm/°C
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
Note:
Foil shown in black, etched spaces in white
Ambient Temperature (°C)
TCR Chord Slopes for Different Temperature Ranges
TABLE 2 - STANDARD IMPRINTING AND DIMENSIONS
D
E
1
Mounting Holes
(1)
E
2
E
I
1
Vishay VPR5Z
100R01 0.1 %
B
I
2
E
2
I
2
I
4)
4)
R
I
3)
3)
E
1
I
1
(2)
XXXX
A
B
C
I
1
E
1
V
E
2
I
2
Date Code
10
10
Year Week
A
in
0.625
1.030
(1)
(2)
(3)
(4)
F
DIMENSIONS
C
D
mm
7.93
7.93
in
0.400
0.788
mm
10.16
20.02
in
0.350
0.350
E
mm
8.89
8.89
F (min)
in
1.500
1.375
mm
38.10
34.90
mm
15.88
26.16
in
0.450
0.450
mm
11.43
11.43
in
0.312
0.312
Notes
#4-40 F.H. machine screw (not included)
Anodized aluminum housing
#26 AWG, teflon coated, 4" min.
#20 AWG, solder coated copper
For any questions, contact:
foil@vishaypg.com
Document Number: 63188
Revision: 22-Jul-10
www.foilresistors.com
2
VPR5Z, VPR7Z
Vishay Foil Resistors
POST MANUFACTURING OPERATIONS (PMO)
Many analog applications can include requirements for
performance under conditions of stress beyond the normal
and over extended periods of time. This calls for more than
just selecting a standard device and applying it to a circuit.
The standard device may turn out to be all that is needed but
an analysis of the projected service conditions should be
made and it may well dictate a routine of stabilization known
as post manufacturing operations or PMO. The PMO
operations that will be discussed are only applicable to Bulk
Metal Foil resistors. They stabilize Bulk Metal Foil resistors
while they are harmful to other types. Short time overload,
accelerated load life, and temperature cycling are the three
PMO exercises that do the most to remove the anomalies
down the road. Vishay Bulk Metal Foil resistors are
inherently stable as manufactured. These PMO exercises
are only of value on Bulk Metal Foil resistors and they
improve the performance by small but significant amounts.
Users are encouraged to contact Vishay Foil applications
engineering for assistance in choosing the PMO operations
that are right for their application.
TABLE 4 - GLOBAL PART NUMBER INFORMATION
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= KΩ
(1)
NEW GLOBAL PART NUMBER: Y011825K5000T9L (preferred part number format)
CHARACTERISTICS
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
Y
0
1
1
8
2
5
K
5
0
0
0
T
9
L
PRODUCT CODE
0118
= VPR5Z
0119
= VPR7Z
RESISTANCE TOLERANCE
T
= ± 0.01 %
A
= ± 0.05 %
B
= ± 0.1 %
PACKAGING
L
= bulk
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0118 25K5000 T 9 L:
TYPE: VPR5Z
VALUE: 25.5 kΩ
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk
HISTORICAL PART NUMBER: VPR5Z T 25K500 T B (will continue to be used)
VPR5Z
MODEL
VPR5Z
VPR7Z
Note
(1)
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
25K500
OHMIC VALUE
25.5 KΩ
T
RESISTANCE
TOLERANCE
T
= ± 0.01 %
A
= ± 0.05 %
B
= ± 0.1 %
B
PACKAGING
B
= bulk
For non-standard requests, please contact application engineering.
Document Number: 63188
Revision: 22-Jul-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and conditions of
purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase.
To the maximum extent permitted by applicable law, Vishay Precision Group
disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability,
including without limitation special, consequential or incidental damages, and (iii) any and all implied
warranties, including warranties of fitness for particular purpose, non-infringement and merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different applications
and performance may vary over time. Statements regarding the suitability of products for certain types of
applications are based on Vishay Precision Group’s knowledge of typical requirements that are often placed on
Vishay Precision Group products. It is the customer’s responsibility to validate that a particular product with the
properties described in the product specification is suitable for use in a particular application.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by
any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
expressly indicated. Customers using or selling Vishay Precision Group products not expressly indicated for use
in such applications do so entirely at their own risk and agree to fully indemnify Vishay Precision Group for any
damages arising or resulting from such use or sale. Please contact authorized Vishay Precision Group personnel
to obtain written terms and conditions regarding products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
1
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