H Series
Vishay Foil Resistors
New Generation of Secondary Standards Hermetically Sealed High Precision Bulk
Metal® Foil Technology Resistors with TCR of ± 2 ppm/°C, Tolerance of ± 0.001 % and
Load Life Stability of ± 0.005 % (Metrology, Laboratory, Instrumentation, Industrial)
FEATURES
The H series resistors are oil-filled, hermetically sealed ultra
precision resistors and are used as secondary standards for
metrology applications.
The hermetic sealing eliminates the ingress of moisture and
oxygen, while the oil acts as a thermal conductor, thus
eliminating the long-term degradation elements of unsealed
resistors, while at the same time allowing the device to
accept short periods of overload without degradation.
Vishay’s Bulk Metal® Foil outperforms all other resistor
technologies available today for applications that require
precision and stability. When combined with the hermetic
sealing and oil filling, the H series resistors become the most
precise and stable resistors available.
With accuracies of 0.001 %, a resistance range from 5 Ω
to 1.84 MΩ, and long term shelf life of less than 2 ppm,
these devices are virtually secondary standards that can be
carried in sets for daily or periodic calibration of factory
measurement equipment.
The H series is available with laboratory and metrology
level precision and long-term stability with additional
in-house oriented processes such as: chip stabilization,
special TCR plotting, additional treatments for ultra
stability and special post manufacturing operations
(PMO). (Please refer to the last page)
TABLE 1 - TCR VS. RESISTANCE VALUE
RESISTANCE
VALUE (Ω)
TYPICAL TCR AND MAX. SPREAD
(- 55 °C to + 125 °C, + 25 °C ref.)
(ppm/°C)
100 to < 1M84
± 2 ± 2.5
50 to < 100
± 2 ± 3.5
5 to < 50
± 2 ± 4.5
Note
• For maximum TCR < 1 ppm/°C, see VHP100 and contact
application engineering
FIGURE 1 - SHELF LIFE - VHA518-11
12K9 VS. QHE
Resistance Change (ppm)
INTRODUCTION
• Temperature coefficient of resistance (TCR):
± 2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C
ref.).
For
ultra
high
performances
(instrumentation and metrology) please refer to
the last page
• Resistance range: 5 Ω to 1.84 MΩ (higher or
lower values of resistance available)
• 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)
• Power rating: 0.3 W to 2.5 W at + 25 °C (depending on
model - see table 2)
• Tolerance: to ± 0.001 % (10 ppm)
• Load life stability to ± 0.002 % (20 ppm) at 25 °C, 2000 h
at rated power
• Load life stability can be considerably improved
through in-house stabilization
• Shelf life stability: ± 2 ppm for at least 6 years
(unaffected by humidity)
• Electrostatic discharge (ESD) up to 25 000 V
• Rise time: 1 ns effectively no ringing
• Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
• Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
• Thermal EMF: 0.05 µV/°C typical
• Voltage coefficient: < 0.1 ppm/V
• Non-inductive: < 0.08 µH
• Non-inductive, non-capacitive design
• Non hot spot design
• Terminal finish available: lead (Pb)-free or tin/lead alloy
• Impervious to harmful environments - oil-filled
• Compliant to RoHS directive 2002/95/EC
• Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
• For better performances (values, TCR, tolerance, stability),
please see the HZ series
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
- 0.1
0
100 200 300 400 500 600 700 800 900 1000
Time (Days)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63006
Revision: 23-Mar-10
For any questions, contact: foil@vishaypg.com
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1
H Series
Vishay Foil Resistors
Percent of Rated Power
FIGURE 2 - POWER DERATING CURVE
+ 100
- 55 °C
+ 75
+ 50
+ 25
0
- 50
- 25
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
FIGURE 3 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 4 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
+ 150
+ 100
Current Path
Before Trimming
Interloop Capacitance
Reduction in Series
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Mutual Inductance
Reduction due
to Change in
Current Direction
ΔR
+ 50
C Alloy 2 ppm/°C
0
R
(ppm)
- 50
- 100
2 ppm/°C
- 150
- 200
- 55
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Ambient Temperature (°C)
Note: Foil shown in black, etched spaces in white
TABLE 2 - MODEL SELECTION
MODEL
NUMBER
STANDARD RESISTANCE
RESISTANCE TOLERANCE PER RANGE MAXIMUM POWER AVERAGE
CONSTRUCTION
WORKING
RANGE
RATING WEIGHT
BRIEF
TIGHTEST VOLTAGE at + 25 °C
RANGE
(Ω)
(g)
(2)
(%)
(Ω)
VHP202
5 to 100K
> 100K to 150K
300
0.3 W
0.2 W
1.4
VHA412
5 to 100K
> 100K to 150K
250
0.3 W
0.2 W
4.6
VHA414
5 to 200K
> 200K to 335K
350
0.5 W
0.3 W
7.3
350
0.75 W
0.4 W
6.3
VHA512*
5 to 300K
> 300K to 500K
5 to 400K
> 400K to 668K
500K
VHA516-5* 5> to
500K to 835K
600K
VHA516-6* 5> to
600K to 1M
700K
VHA518-7* 5> to
700K to 1M17
800K
VHA518-8* 5> to
800K to 1M34
900K
VHA518-9* 5> to
900K to 1M5
5
to
1.0M
VHA518-10* > 1.0M
to 1M67
1.0M
VHA518-11* 5> to
1.0M to 1M84
VHA516-4*
1K to (1)
± 0.001
500 to < 1K
± 0.0025
50 to < 500
± 0.005
30 to < 50
± 0.01
20 to < 30
± 0.02
10 to < 20
± 0.05
5 to < 10
± 0.1
500
600
1.0 W
0.5 W
1.25 W
0.6 W
1.5 W
0.7 W
1.75 W
0.8 W
2.0 W
0.9 W
2.25 W
1.0 W
2.5 W
1.1 W
2.5 W
1.2 W
Oil-filled, tinned
copper leads, nickel
shell, kovar and
glass header
DIMENSIONS (3)
INCHES
mm
W: 0.162 ± 0.020
L: 0.415 ± 0.020
H: 0.430 ± 0.020**
LL: 1.000 ± 0.125
LS: 0.150 ± 0.010 (4)
ST: 0.095 max.
L: 0.625 ± 0.031
D: 0.375 ± 0.031
LL: 1.000 min.
L: 1.000 ± 0.031
D: 0.375 ± 0.031
LL: 1.000 min.
L: 0.625 ± 0.031
D: 0.500 ± 0.031
LL: 1.000 min.
4.11 ± 0.51
10.54 ± 0.51
10.92 ± 0.51
25.4 ± 3.18
3.81 ± 0.25
2.41 max.
15.88 ± 0.79
9.53 ± 0.79
25.4 min.
25.4 ± 0.79
9.53 ± 0.79
25.4 min.
15.88 ± 0.79
12.7 ± 0.79
25.4 min.
9.2
Oil-filled,
tinned copper leads, L: 1.000 ± 0.031
tinned brass shell, D: 0.500 ± 0.031
LL: 1.000 min.
kovar and
glass end bells
25.4 ± 0.79
12.7 ± 0.79
25.4 min.
13.5
L: 1.500 ± 0.031
D: 0.500 ± 0.031
LL: 1.000 min.
38.1 ± 0.79
12.7 ± 0.79
25.4 min.
Notes
* Available in a 4-lead terminal
** 0.375 H available
See next page for numbered footnotes
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Document Number: 63006
Revision: 23-Mar-10
H Series
Vishay Foil Resistors
FIGURE 5 - STANDARD IMPRINTING AND DIMENSIONS
Front View
L
H
VISHAY
XXXX
VHP202
Rear View
Lead Material #22 AWG
Round Solder Coated Copper
W
Resistance
Value Code
100R01
0.01%
XXXX
Model
Number
D
VISHAY
XXXX
Tolerance
Serial No.
Date Code
07
10
Year Week
L
LL
ST
Date Code
07
06
Year Week
LL
LS
Model No.
VHA412
100R01 0.005%
Lead Material
#22 AWG Round
Solder Coated Copper
Resistance
Value Code
Tolerance
TABLE 3 - “H” SERIES SPECIFICATIONS
Stability (8)
Load life at 2000 h
± 0.002 % (20 ppm) at 25 °C at rated power
Shelf life
± 2 ppm (0.0002 %) for at least 6 years
Current Noise
< - 40 dB
High Frequency Operation
Rise time
Inductance (L)
1.0 ns without ringing
(5)
0.1 µH maximum; 0.08 µH typical
Capacitance (C)
1.0 pF maximum; 0.5 pF typical
Voltage Coefficient
< 0.1 ppm/V (6)
Thermal EMF (7)
0.1 µV/°C maximum; 0.05 µV/°C typical; 1 µV/W maximum
Hermeticity
10-7 atmospheric cc/s maximum
Notes
(1) Upper end of resistance range varies with model selected (i.e. VHP202; the range is to 150 kΩ; VHA518-10, the range is to 1M67 Ω) per table 2
(2) Not to exceed power rating of resistor
(3) Insulating sleeve - a special case insulating plastic sleeve is available on VHA models. See table 4 for instructions on how to specify
(4) 0.200" (5.08 mm) lead spacing available - specify VH202J
(5) Inductance (L) due mainly to the leads
(6) The resolution limit of existing test equipment (within measurement capability of the equipment, or “essentially zero”)
(7) µV/°C relates to EMF due to lead temperature difference and µV/W due to power applied to the resistor
(8) Load life ΔR maximum. Can be reduced through in-house oriented processes
POST MANUFACTURING OPERATIONS OR PMO FOR IMPROVED END OF LIFE
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,
Document Number: 63006
Revision: 23-Mar-10
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 amounts that are small but
significant when compared to the very tight tolerances. Users
are encouraged to contact Vishay Foil applications
engineering for assistance in choosing the PMO operations
that are right for their application.
For any questions, contact: foil@vishaypg.com
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3
H Series
Vishay Foil Resistors
TABLE 4 - GLOBAL PART NUMBER INFORMATION (1)
NEW GLOBAL PART NUMBER: Y0019120K500V9L (preferred part number format)
DENOTES PRECISION
VALUE
CHARACTERISTICS
Y
R=Ω
K = kΩ
M = MΩ
0 = standard
1 = tin/lead with plastic sleeve
9 = lead (Pb)-free
19 = lead (Pb)-free with plastic sleeves
2 to 999 = custom
Y
0
0
1
9
1
2
0
K
5
0
0
V
9
L
PRODUCT CODE
RESISTANCE TOLERANCE
PACKAGING
0024 = VHP202 and VH202C
0019 = VHA412
0025 = VHA414
0023 = VHA512
1725 = VHA512 (4-terminals)
0104 = VHA516-4
1726 = VHA516-4 (4-terminals)
0105 = VHA516-5
1727 = VHA516-5 (4-terminals)
0106 = VHA516-6
1728 = VHA516-6 (4-terminals)
0107 = VHA518-7
1729 = VHA518-7 (4-terminals)
0108 = VHA518-8
1730 = VHA518-8 (4-terminals)
0109 = VHA518-9
1731 = VHA518-9 (4-terminals)
0110 = VHA518-10
1732 = VHA518-10 (4-terminals)
0111 = VHA518-11
1733 = VHA518-11 (4-terminals)
S = ± 0.001 %
U = ± 0.002 %
X = ± 0.0025 %
V = ± 0.005 %
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
L = bulk pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0019 120K500 V 9 L:
TYPE: VHA412
VALUE: 120.5 kΩ
ABSOLUTE TOLERANCE: ± 0.005 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
HISTORICAL PART NUMBER: VHA412T 120K50 V B (will continue to be used)
VHA412
T
120K50
V
B
PACKAGING
B = bulk pack
MODEL
TERMINATION
PLASTIC SLEEVE
OHMIC VALUE
TOLERANCE
VHP202 and VH202C
VHA412
VHA414
VHA512 (2)
VHA516-4 (2)
VHA516-5 (2)
VHA516-6 (2)
VHA518-7 (2)
VHA518-8 (2)
VHA518-9 (2)
VHA518-10 (2)
VHA518-11 (2)
T = lead (Pb)-free
None = tin/lead
P = plastic sleeve
None = standard
120K50 = 120.5 kΩ
S = ± 0.001 %
U = ± 0.002 %
X = ± 0.0025 %
V = ± 0.005 %
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
Notes
(1)
For non-standard requests, please contact application engineering
(2)
4-terminal construction of these types are available, please quote:
2-Terminal
VHA512
VHA516-4
VHA516-5
VHA516-6
VHA518-7
VHA518-8
VHA518-9
VHA518-10
VHA518-11
4-Terminal
302073
302074-4
302074-5
302074-6
302075-7
302075-8
302075-9
302075-10
302075-11
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For any questions, contact: foil@vishaypg.com
Document Number: 63006
Revision: 23-Mar-10
H Series
Vishay Foil Resistors
ULTRA HIGH PRECISION HERMETICALLY
SEALED RESISTORS
APPLICATIONS INCLUDE
INTRODUCTION
The response of Vishay's hermetically sealed resistors under
variable conditions and stresses can be made better by
additional in-house oriented processes (PMO). Processes
such as short time overload, accelerated load life and
temperature cycling produce enhanced levels of accuracy,
stability and speed, offering immediate answers to many
resistor applications currently believed unsolvable, and
opens entirely new areas of design where the use of
resistors had not been considered.
• Resistance standards
• Feedback devices for operational amplifiers
• Precision voltage dividers
• Meter multipliers
• Precision bridge resistors
• Decade voltage dividers
See table 5 for the improvement to expect in hermetically
sealed parts when calling for Vishay in-house oriented
processes (PMO).
TABLE 5 - EXAMPLES OF NON-STANDARD REQUIREMENTS
TYPE
VHA518-11 Set of 10 Resistors
(+ 20 °C to + 30 °C)
VHA518-7 4-Terminal (+ 20 °C to + 30 °C)
VHA518-7 4-Terminal Matched Pairs
(+ 20 °C to + 30 °C)
VHA518 Set of 10 Resistors
(+ 18 °C to + 28 °C, + 23 °C ref.)
VALUE
TOLERANCE
TCR
ABSOLUTE
MATCH
ABSOLUTE
TRACKING
1Ω
0.1 %
0.005 %
0.5 ppm/°C
0.5 ppm/°C
10 Ω
0.05 %
-
0.5 ppm/°C
-
100 Ω
0.01 %
-
0.5 ppm/°C
-
120 Ω
0.005 %
-
0.4 ppm/°C
-
1K
0.005 %
-
0.3 ppm/°C
-
10K
0.001 %
-
0.3 ppm/°C
-
100K
0.001 %
-
0.3 ppm/°C
-
10 Ω
0.05 %
0.02 %
0.5 ppm/°C
0.5 ppm/°C
100 Ω
0.01 %
0.01 %
0.5 ppm/°C
0.5 ppm/°C
REMARKS
with PMO
with PMO
1K
0.005 %
0.002 %
0.3 ppm/°C
0.3 ppm/°C
10K
0.001 %
0.002 %
0.3 ppm/°C
0.3 ppm/°C
100K
0.001 %
0.002 %
0.3 ppm/°C
0.3 ppm/°C
999Ω475
0.05 %
0.005 %
0.5 ppm/°C
0.5 ppm/°C
with PMO
with PMO
ORDERING INFORMATION
Resistors are built to your requirements. Send your schematic and electrical requirements to the applications engineering
department at foil@vishaypg.com. A unique part number will be assigned which defines all aspects of your resistor.
Document Number: 63006
Revision: 23-Mar-10
For any questions, contact: foil@vishaypg.com
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5
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-2011
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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
conduct of VPG.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
expressly indicated. Customers using or selling VPG products not expressly indicated for use in such applications do
so entirely at their own risk and agree to fully indemnify VPG for any damages arising or resulting from such use or sale.
Please contact authorized VPG 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.
Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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