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, Inc.
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, “VPG”), 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 VPG’s terms and conditions of purchase, including but
not limited to, the warranty expressed therein.
VPG 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, VPG 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 VPG’s knowledge of typical requirements that are often placed on VPG 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. You should ensure you have the current version of the relevant information by contacting
VPG prior to performing installation or use of the product, such as on our website at vpgsensors.com.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by any
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The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
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Please contact authorized VPG personnel to obtain written terms and conditions regarding products designed for such
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Product names and markings noted herein may be trademarks of their respective owners.
Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
www.vpgsensors.com
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