VH Hermetic
Vishay Foil Resistors
Bulk Metal
®
Foil Technology
Hermetically Sealed Resistors, Aerospace
FEATURES
• VH102K Series
Nominal Temperature Coefficient of Resistance:
– 0.3ppm/°C (0°C to + 25°C);
+ 0.3ppm/°C (+ 25°C to + 60°C);
– 1.0ppm/°C (– 55°C to + 25°C);
+ 1.0ppm/°C (+ 25°C to + 125°C)
• VHS102 Series
Nominal Temperature Coefficient of Resistance:
+ 0.6ppm/°C (0°C to + 25°C);
– 0.6ppm/°C (+ 25°C to + 60°C);
+ 2.2ppm/°C (– 55°C to + 25°C);
– 1.8ppm/°C (+ 25°C to + 125°C)
• VHS555 Temperature Coefficient of Resistance:
±
5ppm/°C (– 55°C to + 125°C);
• Selected TCR Tracking: to 0.5ppm/°C (matched sets)
• Load-Life Stability:
±
0.0025% maximum
∆R
at 0.1 watt,
+ 60°C, 2,000 hours (VHS555)
• Power Rating: 0.6 Watts at + 70°C; 0.3 Watts at + 125°C
• Resistance Tolerance (Initial Resistance Accuracy):
±
0.005% tightest to
±
1.0% loosest
• Resistance Range: 1Ω to 150KΩ
Product may not
be to scale
The "VH" series of resistors is the hermetic version of sev-
eral 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 counter-
part of the S102C and S102K high-performance molded re-
sistors. VHS555 is the hermetically-sealed version of the
S555, MIL style RNC90Y.
THROUGH HOLE
TABLE 1 - MODEL SELECTION
RESISTANCE STANDARD RESISTANCE MAXIMUM
AMBIENT
RANGE
TOLERANCE
1
%
WORKING
POWER RATING
3 ††
(
Ω
)
TIGHTEST LOOSEST VOLTAGE
2
@ + 70°C @ + 125°C
VH102K*
30.1 to 150K
±
0.005
±
1.0
20 to < 30.1
±
0.01
±
1.0
VHS102
10 to < 20
±
0.05
±
1.0
5 to < 10
±
0.10
±
1.0
1 to < 5
±
0.25
±
1.0
300
0.6 W
0.3 W
VHS555†
30.1 to 150K
±
0.005
±
1.0
16.2 to < 30.1
±
0.05
±
1.0
±
0.10
±
1.0
4.99 to < 16.2
1 to < 4.99
±
0.25
±
1.0
*Available from 1 ohm to 100K only.
† Contains RNC90Y inside (4.99 ohms to 121 K).
†† Above 100Kohms VHS102 power is derated to 0.4 W @ + 70°C and 0.2 W @ + 125°C
**0.375H available.
See the third page in this datasheet for numbered footnotes.
MODEL
NUMBER
AVERAGE
WEIGHT
(GRAMS)
DIMENSIONS
INCHES
W 0.185 Maximum
L
1.4
H
0.435 Maximum
mm
4.70 Maximum
11.05 Maximum
25.4
±
3.18
3.81
±
0.25
2.41 Maximum
0.430 Maximum** 10.92 Maximum
LL 1
±
0.125
LS 0.150
±
0.010
4
ST 0.095 Maximum
FIGURE 1 - STANDARD IMPRINTING AND DIMENSIONS
Front View
L
VISHAY
XXXX
VHS555
Rear View
W
100R01
0.01%
XXXX
ST
Date Code
01
10
Year Week
LS
Lead Material #22 AWG
Round Solder Coated Copper
LL
Resistance
Value Code
Tolerance
Serial No.
(Optional Marking)
H
Model
Number
SALES
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For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63004
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 02-Mar-05
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77
VH Hermetic
Vishay Foil Resistors
Bulk Metal
®
Foil Technology
Hermetically Sealed Resistors, Aerospace
TABLE 2 - “H” SERIES SPECIFICATIONS
5
TEMPERATURE COEFFICIENT OF RESISTANCE
VH102K
Nominal TCR
6
(See Fig. 7 and 8 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Maximum TCR
(See Fig. 7 and 8 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Selected
9
TCR Tracking
10
(Closest Spread)
– 0.3ppm/°C (0°C to + 25°C)
+ 0.3ppm/°C (+ 25° to + 60°C)
– 1.0ppm/°C (– 55°C to + 25°C)
+ 1.0ppm/°C (+ 25°C to + 125°C)
±
2.5ppm/°C (0°C to + 25°C and + 25°C to + 60°C)
±
2.5ppm/°C (– 55°C to + 25°C and + 25°C to + 125°C)
0.5ppm/°C
+ 0.6ppm/°C
– 0.6ppm/°C
+ 2.2ppm/°C
– 1.8ppm/°C
(0°C to + 25°C)
(+ 25°C to + 60°C)
(– 55°C to + 25°C)
(+ 25°C to + 125°C)
THROUGH HOLE
VHS102
Nominal TCR
6
(See Fig. 1 and 2 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Standard TCR Spread from Nominal
7
(See Fig. 5 and 6 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Maximum TCR Spread from Nominal
14
(See Fig. 5 and 6 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Selected
9
TCR Tracking
10
VHS555
Nominal TCR
6
(See Fig. 1 and 2 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Standard TCR Spread from Nominal
7
(See Fig. 5 and 6 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Maximum TCR Spread from Nominal
(See Fig. 5 and 6 in datasheet “7 Technical Reasons to Specify
Vishay Bulk Metal
®
Foil Resistive Components.”)
Selected
8
TCR Tracking
10
Stability
14
8
±
1.5ppm/°C (0°C to + 25°C and + 25°C to + 60°C)
±
2.0ppm/°C (– 55°C to + 25°C and + 25°C to + 125°C)
±
2.5ppm/°C (0°C to + 25°C and + 25°C to + 60°C)
±
2.3ppm/°C (– 55°C to + 25°C and + 25°C to + 125°C)
0.5ppm/°C
+ 0.6ppm/°C
– 0.6ppm/°C
+ 2.2ppm/°C
– 1.8ppm/°C
(0°C to + 25°C)
(+ 25° to + 60°C)
(– 55°C to + 25°C)
(+ 25° to + 125°C)
±
1.5ppm/°C (0°C to + 25°C and + 25°C to + 60°C)
±
2.0ppm/°C (– 55°C to + 25°C and + 25°C to + 125°C)
±
2.5ppm/°C (0°C to + 25°C and + 25°C to + 60°C)
±
2.3ppm/°C (– 55°C to + 25°C and + 25°C to + 125°C)
0.5ppm/°C
VH102K
±
0.025%
±
0.005%
±
0.02%
±
5ppm
±
10ppm
VHS102
±
0.025%
±
0.005%
±
0.02%
(0.0005%)
(0.001%)
VHS555
±
0.015%
±
0.0025%
±
0.01%
Load Life at 2,000 hours.
Load Life at 10,000 hours.
Shelf Life Stability
Current Noise
High Frequency Operation
Rise/Decay Time
Inductance (L)
11
Capacitance (C)
Voltage Coefficient
Thermal EMF
13
Hermeticity
@ 0.3W/+ 125°C
@ 0.1W/+ 60°C
@ 0.05W/+ 125°C
Maximum
∆R
after 1 year
Maximum
∆R
after 3 years
< 0.010µV (RMS)/Volt of applied voltage (– 40dB)
1.0 ns at 1KΩ
0.1µH maximum; 0.08µH typical
1.0pF maximum; 0.5pF typical
< 0.1ppm/V
12
0.1µV/°C Maximum; 0.05µV/°C Typical 1µV/watt
10
–7
Atmospheric cc/sec Maximum
SALES
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For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63004
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 02-Mar-05
VH Hermetic
Bulk Metal
®
Foil Technology
Vishay Foil Resistors
Hermetically Sealed Resistors, Aerospace
NOTES:
1. Standard Resistance Tolerance:
±
0.005%;
±
0.01%;
±
0.02%;
±
0.05%;
±
0.1%;
±
0.25%;
±
0.5%;
±
1.0%.
2. Not to exceed power rating of resistor.
3. See Figure 2 below.
4. 0.200" (5.08 mm) lead spacing available (except VHS555)–
specify VH102J (S102C type), VH102L (S102K type).
5. Maximum is 1.0% A.Q.L. standard for all specifications
except TCR. (For TCR information see notes 6 -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.
6. Vishay Nominal TCR is defined as the chord slopes of
the relative change of resistance/temperature, expressed
in ppm (parts per million), called (RT) curve from 0°C to
+ 25°C and + 25°C to + 60°C (“Instrument” Range); and
from – 55°C to + 25°C and + 25°C to + 125°C (“Military”
Range). These specifications and the definition of
Nominal TCR apply to all resistance values including
low-value resistors.
7. Vishay Standard TCR Spread is defined as a designers
reference which represents that at least 92% of the units,
and 82% of the lots, supplied by Vishay will be within
the stated band centered on the nominal curve. This
definition of the Vishay Standard TCR Spread from
Nominal applies to all resistance values. However, as
the resistance value decreases below 80 ohms, the
Vishay Standard TCR Spread from Nominal specification
starts to increase. (See Figure 3 in data sheet “7 Technical
Reasons to specify BMF Resistive Components.”)
8. 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
±
2.5ppm/°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 ohms, 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.”)
9. Selected TCR Tracking is available for specially ordered lots
of resistors. The selected TCR tracking can be 3, 2, 1 and as
close as 0.5ppm/°C throughout the full temperature range.
10. 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 (∆R
1
/R
1
–
∆R
2
/R
2
) x
10
-6
/∆T°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
±
1.5ppm/°C about a
nominal, the tracking, as defined above, will be 3ppm/°C.
11 Inductance (L) due mainly to the leads.
12. The resolution limit of existing test equipment (within the
measurement capability of the equipment, or “essentially
zero.”)
13.
µV/°C
relates to EMF due to lead temperature difference and
µV/watt
due to power applied to the resistor.
14. Load life
∆R
Maximum can be reduced through burn-in
procedure.
THROUGH HOLE
FIGURE 2 - POWER DERATING CURVE
–55°C
+70°C Double Rated Power
Percent of Rated Power @ +125°C
+200
+175
+150
+125
Rated Power
+100
+75
+50
+25
0
–75 –50
–25
0
+25 +50
+75 +100 +125 +150 +175 +200
Ambient Temperature (°C)
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For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63004
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 02-Mar-05
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79
VH Hermetic
Vishay Foil Resistors
Bulk Metal
®
Foil Technology
Hermetically Sealed Resistors, Aerospace
TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON
MIL-PRF-55182/9
CHARACTERISTIC Y MAXIMUM
∆
R
Test Group I
Thermal Shock
Overload
Test Group II
Resistance Temp Char.
Temp Storage
Low Temp 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 @ 0.3 W/+ 125°C
2,000 Hours
10,000 Hours
Test Group Va
+ 70°C Power Rating
Test Group VI
High Temp Exposure
VH102K
TYPICAL
5
∆
R
VHS102
TYPICAL
5
∆
R
VHS555
TYPICAL
5
∆
R
±
0.05%
±
0.05%
±
0.002%
±
0.003%
±
0.002%
±
0.003%
±
0.002%
±
0.003%
THROUGH HOLE
±
5ppm/°C
±
0.05%
±
0.05%
±
0.02%
See Figures 7 & 8*
±
0.005%
±
0.005%
±
0.002%
See Figures 1 & 2, and Figures 5 & 6*
±
0.005%
±
0.0025
±
0.005%
±
0.005%
±
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%
±
0.01%
±
0.02%
±
0.002%
±
0.002%
±
0.002%
±
0.002%
±
0.002%
±
0.002%
±
0.05%
±
0.5%
±
0.03%
±
0.05%
±
0.03%
±
0.05%
±
0.01%
±
0.02%
±
0.05%
±
0.02%
±
0.02%
±
0.02%
±
0.05%
±
0.05%
±
0.05%
±
0.04%
Test Group VII
Voltage Coefficient
0.0005%/V
< 0.00001%/V
< 0.00001%/V
See previous page for numbered footnotes.
*These figures can be found in data sheet “7 Technical Reasons to Specify Bulk Metal
®
Foil Resistive Components.”
< 0.00001%/V
TABLE 4 - ORDERING INFORMATION
Please specify Vishay VH102K, VHS102 and VHS555 resistors as follows: (See Imprinting Illustration and Table 1, 1st page in this
datasheet, for further details).
Example:
VHS555
MODEL NO.
100R01
RESISTANCE VALUE
0.01%
TOLERANCE
Resistance Value, in ohms, is expressed by a series of 6 characters, 5 of which represent significant digits while the 6th is a dual purpose
letter that designates both the multiplier and the location of the comma or decimal.
RESISTANCE
RANGE**
LETTER
DESIGNATOR
MULTIPLIER
FACTOR
EXAMPLE
100R01 = 100.01Ω
15K231 = 15,231Ω
1Ω to < 1KΩ
R
x1
1KΩ to < 150KΩ
K
x 10
3
**Resistance Range limit of 100KΩ for VH102K, 150KΩ for VHS555, 150KΩ for VHS102.
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For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63004
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Revision 02-Mar-05
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay 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 Number: 91000
Revision: 18-Jul-08
www.vishay.com
1
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