Document Number: 63006 For any questions, contact: foil@vishay.com
www.vishay.com
Revision: 14-Nov-07 3
H Series
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 %
Vishay Foil Resistors
Notes
1. Upper end of resistance range varies with model selected (i.e. VHP202; the range is to 150 k
Ω
; 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
Δ
R maximum. Can be reduced through in-house oriented processes
FIGURE 4 - STANDARD IMPRINTING AND DIMENSIONS
LS
Model
Number
VISHAY
XXXX
VHP202
ST
H
L
Date Code
W
Front View Rear View
Lead Material
#22 AWG Round
Solder Coated Copper
Resistance
Value Code
Tolerance
Serial No.
100R01
0.01%
XXXX
06
Week
07
Year
LL
Lead Material #22 AWG
Round Solder Coated Copper
Tolerance
Model No.
Resistance
Value Code
Date Code
10
Week
07
Year
VISHAY
XXXX
VHA412
100R01 0.005%
D
LLL
TABLE 3 - “H” SERIES SPECIFICATIONS
Stability
8)
Load life at 2000 h ± 0.002 % maximum ΔR at 0.1 W per chip and at + 60 °C
Shelf life ± 2 ppm (0.0002 %) for at least 10 years
Current Noise < - 40 dB
High Frequency Operation
Rise time 1.0 ns without ringing
Inductance (L)
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
