VH Hermetic
Vishay Foil Resistors
Hermetically Sealed High Precision Bulk Metal
®
Foil
Technology Aerospace Resistors with TCR of ± 1 ppm/°C,
Tolerance to ± 0.005 % and Load Life Stability of ± 0.005 %
FEATURES
•
Temperature coefficient of resistance (TCR):
- 55 °C to + 125 °C, + 25 °C ref.:
VH102K: ± 1 ppm/°C typical
VHS102: ± 2 ppm/°C typical
VHS555: ± 5 ppm/°C maximum
•
Tolerance: to ± 0.005 %
•
Resistance range: 1
Ω
to 150 kΩ (higher or lower
resistance values are available
•
Load life stability: 0.005 % (70 °C for 2000 h at rated power)
•
Electrostatic discharge (ESD) > 25 000 V
•
Power rating: 0.6 W at + 70 °C; 0.3 W at + 125 °C
•
Non inductive, non capacitive design
•
Non hot spot 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
•
Termal finishes available:
lead (Pb)-free
tin/lead alloy
•
Impervious to harmful environments - oil filled
•
For better performance, please see VH102Z datasheet
Any value at any tolerance available within resistance range
The “VH” series of resistors is the hermetic version of several
molded “S” series devices. Hermetic sealing eliminates the
ingress of both oxygen, which degrades resistors over long
periods, and moisture which degrades resistors more
quickly. These parts are made with glass to metal seal
enclosures employing Kovar eyelets which allow the copper
leads to pass through the enclosure to minimize the thermal
EMF from the lead junctions. Rubber fill between the metal
housing and resistance element acts both as a mechanical
damper and thermal transfer path.
VHS102 and VH102K are the hermetically-sealed
counterpart of the S102C and S102K high-performance
molded resistors. VHS555 is the hermetically-sealed version
of the S555, MIL style RNC90Y.
TABLE 1 - MODEL SELECTION
RESISTANCE
MODEL
RANGE
NUMBER
(Ω)
VH102K
†
VHS102
30.1 to 150K
20 to < 30.1
10 to < 20
5 to < 10
1 to < 5
30.1 to 150K
16.2 to < 30.1
4.99 to < 16.2
1 to < 4.99
AMBIENT
AVERAGE
MAXIMUM
3) †††
WEIGHT
WORKING POWER RATING
(g)
VOLTAGE
2)
TIGHTEST LOOSEST
at + 70 °C at + 125 °C
± 0.005
± 0.01
± 0.05
± 0.10
± 0.25
± 0.005
± 0.05
± 0.10
± 0.25
± 1.0
± 1.0
± 1.0
± 1.0
± 1.0
± 1.0
± 1.0
± 1.0
± 1.0
STANDARD
RESISTANCE
TOLERANCE
1)
%
DIMENSIONS
INCHES
mm
300
0.6 W
0.3 W
1.4
VHS555
††
W
0.185 maximum
4.70 maximum
L
0.435 maximum
11.05 maximum
H 0.430 maximum
††††
10.92 maximum
LL
1 ± 0.125
25.4 ± 3.18
LS
0.150 ± 0.010
4)
3.81 ± 0.25
ST
0.095 maximum
2.41 maximum
Notes
† Available from 1
Ω
to 100 kΩ only
†† Contains RNC90Y inside (4.99
Ω
to 121 kΩ)
††† Above 100 kΩ VHS102 power is derated to 0.4 W at + 70 °C and 0.2 W at + 125 °C
†††† 0.375 H available
FIGURE 1 - STANDARD IMPRINTING AND DIMENSIONS
Front View
L
VISHAY
XXXX
VHS555
Rear View
W
100R01
0.01
%
XXXX
ST
Date Code
08
10
Year
Week
LS
Lead Material #22 AWG
Round Solder Coated Copper
LL
Resistance
Value
Code
Tolerance
Serial
No.
(Optional Marking)
H
Model
Number
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63004
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
VH Hermetic
Vishay Foil Resistors
TABLE 2 - TOLERANCE AND TCR VS. RESISTANCE VALUE
RESISTOR
VHS102
VH102K
VHS102
VH102K
VHS102
VH102K
RESISTANCE VALUE (Ω)
80 to 150K
80 to 100K
50 to < 80
1 to < 50
TYPICAL TCR AND MAXIMUM SPREAD
(- 55 °C to + 125 °C, + 25 °C ref.)
(ppm/°C)
± 2 ± 2.5
± 1 ± 2.5
± 2 ± 3.5
± 1 ± 3.5
± 2 ± 4.5
± 1 ± 4.5
TABLE 3 - SPECIFICATIONS
5)
Selected
6)
TCR Tracking
8)
Stability
12)
VH102K
Load life at 2000 h
± 0.025 %
± 0.005 %
Load life at 10 000 h
Shelf Life Stability
Current Noise
High Frequency Operation
Rise time
Inductance (L)
9)
Capacitance (C)
Voltage Coefficient
Thermal EMF
11)
Hermeticity
Notes:
1)
0.5 ppm/°C
VHS102
± 0.025 %
± 0.005 %
± 0.02 %
(0.0005 %)
(0.001 %)
VHS555
± 0.015 %
± 0.0025 %
± 0.01 %
at 0.3 W/+ 125 °C
at 0.1 W/+ 60 °C
at 0.05 W/+ 125 °C
± 0.02 %
± 5 ppm
± 10 ppm
maximum
ΔR
after 1 year
maximum
ΔR
after 3 years
< 0.010 µV
RMS
/V of applied voltage (- 40 dB)
1.0 ns
0.1 µH maximum; 0.08 µH typical
1.0 pF maximum; 0.5 pF typical
< 0.1 ppm/V
10)
0.1 µV/°C maximum; 0.05 µV/°C typical 1 µV/W
10
-7
atmospheric cc/s maximum
Standard resistance tolerance: ± 0.005 %; ± 0.01 %; ± 0.02 %;
± 0.05 %; ± 0.1 %; ± 0.25 %; ± 0.5 %; ± 1.0 %.
Not to exceed power rating of resistor.
See Figure 2 below.
0.200" (5.08 mm) lead spacing available (except VHS555) -
specify VH102J (S102C type), VH102L (S102K type).
Maximum is 1.0 % A.Q.L. standard for all specifications except
TCR. (For TCR information see notes 6 to 10.) Typical is a
designers reference which represents that 85 % of the units
supplied, over a long period of time, will be at least the figure
shown or better.
Vishay maximum TCR spread is defined as the 3
σ
(sigma) limit
of a normal Gaussian distribution (99.73 % of a production lot)
which is within a band, centered on the nominal curve. This
Vishay maximum TCR spread is no greater than ± 2.5 ppm/°C
from nominal throughout the full temperature range. This
definition of the Vishay maximum TCR spread from nominal
applies to all resistance values. However, as the resistance
value decreases below 80
Ω,
the Vishay maximum TCR spread
from nominal specification starts to increase. (See Figure 3 in
datasheet “7 Technical Reasons to Specify Vishay Bulk Metal
®
Foil Resistive Components”)
7)
2)
3)
4)
Selected TCR tracking is available for specially ordered lots of
resistors. The selected TCR tracking can be 3, 2, 1 and as close
as 0.5 ppm/°C throughout the full temperature range.
TCR tracking is a measure of the similarity of resistance value
change in two or more resistors which are undergoing the same
temperature changes. Tracking could be expressed as the
difference in the temperature coefficients of the resistors,
expressed in ppm/°C as (ΔR
1
/R
1
to
ΔR
2
/R
2
) x 10
-6
/ΔT°C. When
a number of resistors are referenced to a nominal TCR, the
spread or envelope around the nominal would be the difference.
If the spread is ± 1.5 ppm/°C about a nominal, the tracking, as
defined above, will be 3 ppm/°C.
Inductance (L) due mainly to the leads.
The resolution limit of existing test equipment (within the
measurement capability of the equipment, or “essentially zero”)
µV/°C relates to EMF due to lead temperature difference and
µV/W due to power applied to the resistor.
Load life
ΔR
maximum can be reduced through in-house
oriented processes.
8)
5)
6)
9)
10)
11)
12)
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Document Number: 63004
Revision: 23-Mar-10
VH Hermetic
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 3 - POWER DERATING CURVE
- 55
°C
+ 70
°C
Double Rated Power
Percent of Rated Power at + 125 °C
+ 200
+ 175
+ 150
+ 125
Rated Power
+ 100
+ 75
+ 50
+ 25
0
- 75 - 50
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
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Note:
Foil shown in
black,
etched spaces in
white
- 25
0
+ 25 + 50
+ 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
TABLE 4 - ENVIRONMENTAL PERFORMANCE COMPARISON
MIL-PRF-55182/9
CHARACTERISTIC Y MAXIMUM
ΔR
Test Group I
Thermal shock
Overload
Test Group II
Resistance temperature
characteristics
Temperature storage
Low temperature operation
Terminal strength
Test Group III
DWV
Insulation resistance
Resistance to solder heat
Moisture resistance
Test Group IV
Shock
Vibration
Test Group V
Life test at 0.3 W/+ 125 °C
2000 h
10 000 h
Test Group Va
+ 70 °C power rating
Test Group VI
High temperature exposure
Test Group VII
Voltage coefficient
0.0005 %/V
< 0.00001 %/V
< 0.00001 %/V
< 0.00001 %/V
Notes:
1. These figures can be found in data sheet "7 Technical Reasons to Specify Bulk Metal
®
Foil Resistive Components."
• See previous page for numbered footnotes.
± 0.05 %
± 0.05 %
± 0.05 %
± 0.04 %
± 0.05 %
± 0.02 %
± 0.02 %
± 0.02 %
± 0.05 %
± 0.5 %
± 0.03 %
± 0.05%
± 0.03 %
± 0.05 %
± 0.01 %
± 0.02 %
± 0.01 %
± 0.02 %
± 0.002 %
± 0.002 %
± 0.002 %
± 0.002 %
± 0.002 %
± 0.002 %
± 0.02 %
10
4
MΩ
± 0.02 %
± 0.05 %
± 0.005 %
40 x
10
5
MΩ
± 0.002 %
± 0.005 %
± 0.005 %
40 x
10
5
MΩ
± 0.002 %
± 0.005 %
± 0.002 %
40 x 10
5
MΩ
± 0.002 %
± 0.005 %
± 5 ppm/°C
± 0.05 %
± 0.05 %
± 0.02 %
See Figures 7
and 8
1)
± 0.005 %
± 0.005 %
± 0.002 %
See Figures 1 and 2,
and Figures 5 and 6
1)
± 0.005 %
± 0.005 %
± 0.002 %
± 0.0025
± 0.005 %
± 0.002 %
± 0.05 %
± 0.05 %
± 0.002 %
± 0.003 %
± 0.002 %
± 0.003 %
± 0.002 %
± 0.003 %
VH102K
TYPICAL
5)
ΔR
VHS102
TYPICAL
5)
ΔR
VHS555
TYPICAL
5)
ΔR
Document Number: 63004
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
VH Hermetic
Vishay Foil Resistors
TABLE 5 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y578780K5000V9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= kΩ
M
= MΩ
AER*
0
= standard product, tin/lead terminations
9
= standard product, lead (Pb)-free terminations
Other
= custom
Y
5
7
8
7
8
0
K
5
0
0
0
V
9
L
PRODUCT CODE
0077
= VHS102
0788
= VH102J
5787
= VH102K
0787
= VH102L
0087
= VHS555
RESISTANCE TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
PACKAGING
L
= bulk pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y5787 80K5000 V 9 L:
TYPE: VH102K
VALUE: 80.5 kΩ
ABSOLUTE TOLERANCE: ± 0.005 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
HISTORICAL PART NUMBER: VH102KT 8K500 V B (will continue to be used)
VH102K
MODEL
VHS102
VH102J
VH102K
VH102L
VHS555
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
80K500
OHMIC VALUE
80K500
= 80.5 kΩ
V
RESISTANCE
TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
B
PACKAGING
B
= bulk pack
Note
* Application engineering release: for non-standard requests, please contact application engineering.
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Document Number: 63004
Revision: 23-Mar-10
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
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