VHZ Datasheet, PDF (1/5 Pages) Vishay Siliconix – Bulk Metal® Foil Technology Hermetically Sealed Resistors, Aerospace

VHZ Hermetic
Vishay Foil Resistors
Bulk Metal^® Foil Technology
Hermetically Sealed Resistors, Aerospace
Product may not
be to scale
The "VHZ" series of resistors is the hermetic version of
the molded "Z" 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.
VH102Z is the hermetically-sealed counterpart of the Z201
high-performance molded resistors. VHZ555 is the
hermetically-sealed version of the Z555, MIL style RNC90Z.
FEATURES
• VH102Z Series
Nominal Temperature Coefficient of Resistance:
± 0.2ppm/°C MIL Range (see table 2)
• VHZ555 Temperature Coefficient of Resistance:
± 2ppm/°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 (VHZ555)
• 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:
VH102Z: 100R to 100K
VHZ555: 4R99 to 121K
TABLE 1 - MODEL SELECTION
MODEL
NUMBER
VH102Z
VHZ555
RESISTANCE
RANGE
(Ω)
100R to 100K
30.1 to 121K
20 to < 30.1
4.99 to < 20
STANDARD RESISTANCE MAXIMUM
AMBIENT
TOLERANCE¹ % WORKING
POWER RATING^{3 †â€} 
TIGHTEST LOOSEST VOLTAGE² at + 70°C at + 125°C
± 0.005
± 1.0
± 1.0
± 1.0
300
0.6 W
0.3 W
± 0.005
± 0.01
± 1.0
± 1.0
± 0.05
± 1.0
**0.375H available.
AVERAGE
WEIGHT
(GRAMS)
DIMENSIONS
INCHES
mm
W 0.185 Maximum 4.70 Maximum
L 0.435 Maximum 11.05 Maximum
1.4
H 0.430 Maximum** 10.92 Maximum
LL 1 ± 0.125
25.4 ± 3.18
LS 0.150 ± 0.010⁴ 3.81 ± 0.25
ST 0.095 Maximum 2.41 Maximum
FIGURE 1 - STANDARD IMPRINTING AND DIMENSIONS
Front View
L
W
VISHAY
H
XXXX
VH102Z
Model
Number
Rear View
100R01
0.01%
XXXX
Resistance
Value Code
Tolerance
Serial No.
(Optional Marking)
Date Code
01 10
Year Week
LS
ST
LL
Lead Material #22 AWG
Round Solder Coated Copper
SALES
• AMERICAS: [e-mail]
• ASIA/JAPAN: [e-mail]
• UK/HOLLAND/SCANDINAVIA: [e-mail]
• GERMANY/CZECH REPUBLIC/AUSTRIA: [e-mail] • FRANCE/SWITZERLAND/SOUTHERN EUROPE: [e-mail] • ISRAEL: [e-mail]
Document Number: 63063
Revision 12-Dec-05
For technical questions, contact: [e-mail]
www.vishay.com
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