VH Hermetic
Hermetically Sealed High Precision
HermeticallySealedHighPrecisionBulkMetal®FoilTechnologyAerospaceResistors
Bulk Metal
®
Foil Technology Aerospace Resistors
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
• Terminal 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
INTRODUCTION
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
Model
Number
Resistance
Range
(Ω)
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
Standard Resistance
Tolerance
(1)
(%)
Tightest
±0.005
±0.01
±0.05
±0.10
±0.25
±0.005
±0.05
±0.10
±0.25
Loosest
Maximum
Working
Voltage
(2)
Ambient Power Rating
(3)(4)
at +70°C
at +125°C
VH102K
(5)
VHS102
±1.0
300
±1.0
0.6 W
0.3 W
VHS555
(6)
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.
(4)
Above 100 kΩ, VHS102 power is derated to 0.4 W at +70°C, and 0.2 W at +125°C.
(5)
Available from 1 Ω to 100 kΩ only.
(6)
Contains RNC90Y inside (4.99 Ω to 121 kΩ).
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document No.: 63004
Revision: 14-May-2015
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
1
VH Hermetic
Figure 1—Standard Imprinting and Dimensions
Front View
L
VFR
XXXX
VHS555
Rear View
W
100R01
0.01 %
XXXX
ST
LL
LS
Lead Material #22 AWG
Round Solder Coated Copper
Resistance
Value Code
Tolerance
Serial No.
(Optional Marking)
Dimensions
Parameter
W
L
H
LL
LS
ST
inches
0.185 max
0.435 max
0.430 max
(1)
1 ±0.125
0.150 ±0.010
(2)
0.095 max
mm
4.70 max
11.05 max
10.92 max
25.4 ±3.18
3.81 ±0.25
2.41 max
Ave.
Weight
g
H
Model
Number
Date Code
08
10
Year Week
1.4
Notes
(1)
0.375 H available.
(2)
0.200" (5.08 mm) lead spacing available (except VHS555)—specify VH102J (S102C type), VH102L (S102K type).
Table 2—Tolerance and TCR vs. Resistance
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 Max. 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
Figure 2—Trimming to Values
(conceptual
illustration)
Interloop
capacitance
reduction
in series
Mutual
inductance
reduction
due to change
in current
direction
Current path
before trimming
Current path after trimming
Figure 3—Power Derating Curve
Percent of Rated Power at +125°C
+200
+175
+150
+125
+100
+75
+50
+25
0
–75
–50
–25
0
+25
+50
+75 +100 +125 +150 +175 +200
Rated Power
–55°C
+70°C Double Rated Power
Note
To acquire a precision resistance value, the Bulk Metal Foil
chip is trimmed by selectively removing built-in “shorting bars.”
To increase the resistance in known increments, marked
areas are cut, producing progressively smaller increases in
resistance. This method reduces the effect of “hot spots” and
improves the long-term stability of VFR resistors.
Trimming process
removes this material
from shorting strip area
changing current path
and increasing
resistance
Foil shown in black, etched spaces in white
Ambient Temperature (°C)
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Document No.: 63004
Revision: 14-May-2015
VH Hermetic
Table 3—Specifications
(1) (2) (3)
Parameter
Selected
(4)
TCR Tracking
(5)
Stability
(6)
Load life at 2000 h:
Load life at 10 000 h:
Shelf Life Stability
Current Noise
High Frequency Operation
Rise time
Inductance (L)
(7)
Capacitance (C)
Voltage Coefficient
Thermal EMF
(9)
Hermeticity
at 0.3 W/+125°C
at 0.1 W/+60°C
at 0.05 W/+125°C
VH102K
±0.025%
±0.005%
±0.02%
Value
0.5 ppm/°C
VHS102
±0.025%
±0.005%
±0.02%
VHS555
±0.015%
±0.0025%
±0.01%
±5 ppm (0.0005%) maximum ΔR after 1 year
±10 ppm (0.001%) 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
(8)
0.1 μV/°C maximum; 0.05 μV/°C typical 1 μV/W
10
–7
atmospheric cc/s maximum
Notes:
(1)
Maximum is 1.0 % A.Q.L. standard for all specifications except TCR. (For TCR information see notes
(4)
to
(7)
.) 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.
(2)
Resistance figures are obtained by measuring the leads at point 0.5" (12.7 mm) ±0.13" (3.2 mm) away from the root.
(3)
Selected TCR tracking is available for specially ordered lots of resistors.
(4)
Vishay Foil Resistors (VFR) 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 VFR maximum TCR spread is no greater than
±2.5 ppm/°C from nominal throughout the full temperature range. This definition of the VFR maximum TCR spread from nominal
applies to all resistance values. However, as the resistance value decreases below 80 Ω, the VFR maximum TCR spread from
nominal specification starts to increase.
(5)
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.
(6)
Load life ΔR maximum can be reduced through in-house oriented processes.
(7)
Inductance (L) due mainly to the leads.
(8)
The resolution limit of existing test equipment (within the measurement capability of the equipment, or “essentially zero”).
(9)
μV/°C relates to EMF due to lead temperature difference and μV/W due to power applied to the resistor.
*
Precaution in Usage:
When soldering to mount hermetically sealed resistors on a board, keep the resistor over 0.39" (10 mm)
away from board surface by the use of an insulating tube.
Document No.: 63004
Revision: 14-May-2015
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
3
VH Hermetic
Table 4—Environmental Performance
Group/Parameter
Test Group I
Thermal shock
Overload
MIL-PRF-55182/9
Characteristic Y Maximum ΔR
±0.05%
±0.05%
VH102K
Typical
(1)
ΔR
±0.002%
±0.003%
VHS102
Typical
(1)
ΔR
±0.002%
±0.003%
VHS555
Typical
(1)
ΔR
±0.002%
±0.003%
Test Group II
Resistance temperature characteristics
Temperature storage
Low temperature operation
Terminal strength
Test Group III
Dielectric withstanding voltage (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
Test Group Va
+70°C power rating
Test Group VI
High temperature exposure
Test Group VII
Voltage coefficient
2000 h
10 000 h
±5 ppm/°C
±0.05%
±0.05%
±0.02%
±0.02%
10
4
MΩ
±0.02%
±0.05%
±0.01%
±0.02%
±0.05%
±0.5%
±0.05%
±0.05%
0.0005%/V
±0.005%
±0.005%
±0.002%
±0.005%
40 × 10
5
MΩ
±0.002%
±0.005%
±0.002%
±0.002%
±0.03%
±0.05%
±0.02%
±0.05%
<0.00001%
±0.005%
±0.005%
±0.002%
±0.005%
40 × 10
5
MΩ
±0.002%
±0.005%
±0.002%
±0.002%
±0.03%
±0.05%
±0.02%
±0.05%
<0.00001%/V
±0.0025%
±0.005%
±0.002%
±0.002%
40 × 10
5
MΩ
±0.002%
±0.005%
±0.002%
±0.002%
±0.01%
±0.02%
±0.02%
±0.04%
<0.00001%/V
Note:
(1)
Maximum is 1.0 % A.Q.L. standard for all specifications except TCR. (For TCR information see notes
(3)
to
(7)
on previous page.)
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.
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Document No.: 63004
Revision: 14-May-2015
VH Hermetic
Figure 4—Global Part Number Information
NEW GLOBAL PART NUMBER: Y578780K5000V9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
K
=k
M
=M
0
= standard product, tin/lead terminations
9
= standard product, lead (Pb)-free terminations
Other
= custom
AER*
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
T
Q
A
B
C
D
F
= ±0.005%
= ±0.01%
= ±0.02%
= ±0.05%
= ±0.1%
= ±0.25%
= ±0.5%
= ±1.0%
L
= bulk pack
PACKAGING
FOR EXAMPLE: ABOVE GLOBAL ORDER Y5787 80K5000 V 9 L:
TYPE: VH102K
VALUE: 80.5 k
ABSOLUTE TOLERANCE: ±0.005%
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
VH102K
MODEL
VHS102
VH102J
VH102K
VH102L
VHS555
HISTORICAL PART NUMBER: VH102KT 8K500 V B (will continue to be used)
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
80K500
OHMIC VALUE
80K500
= 80.5 k
V
RESISTANCE
TOLERANCE
V
T
Q
A
B
C
D
F
= ±0.005%
= ±0.01%
= ±0.02%
= ±0.05%
= ±0.1%
= ±0.25%
= ±0.5%
= ±1.0%
B
PACKAGING
B
= bulk pack
Note
* Application engineering release: for non-standard requests, please contact application engineering.
Document No.: 63004
Revision: 14-May-2015
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
5
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