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www.vishay.com VHZ Hermetic Vishay Foil Resistors Document Number: 63063 Revision 12-Dec-05 THROUGH HOLE For technical questions, contact: foil@vishay.com SALES Bulk Metal® Foil Technology Hermetically Sealed Resistors, Aerospace

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 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. MODEL RESISTANCE STANDARD RESISTANCE MAXIMUM AMBIENT AVERAGE DIMENSIONS NUMBER RANGE TOLERANCE 1 %W ORKING POWER RATING 3 †† WEIGHT (Ω)T IGHTEST LOOSEST VOLTAGE 2 at + 70°C at + 125°C (GRAMS) INCHES mm VH102Z 100R to 100K ± 0.005 ± 1.0 W 0.185 Maximum 4.70 Maximum ± 1.0 L 0.435 Maximum 11.05 Maximum LS Model Number VISHA Y XXXX VH102Z ST H L Date Code W Front View Rear View Lead Material #22 AWG Round Solder Coated Copper Resistance Value Code Tolerance Serial No. (Optional Marking) 100R01 0.01% XXXX Week Year LL TABLE 1 - MODEL SELECTION FIGURE 1 - STANDARD IMPRINTING AND DIMENSIONS **0.375H available. Product may not be to scale

Document Number: 63063 Revision 12-Dec-05 www.vishay.com VHZ Hermetic Vishay Foil Resistors THROUGH HOLE For technical questions, contact: foil@vishay.com SALES TEMPERATURE COEFFICIENT OF RESISTANCE Nominal TCR6 (- 55°C to + 125°C) VH102Z Maximum TCR (- 55 °C to + 125°C, + 25°C - ref) VHZ555 Maximum TCR (- 55 °C to + 125°C, + 25°C - ref) Selected7 TCR Tracking8 (closest spread) Stability9 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) 10 Capacitance (C) Voltage Coefficient Thermal EMF12 Hermeticity 0.2ppm/°C ± 0.8ppm/°C ± 3ppm/°C for values 4R99 to 25R ± 2.5ppm/°C for values 25R to 80R ± 2ppm/°C for values > 80R 0.5ppm/°C VH102Z VHZ555 ± 5ppm (0.0005%) Maximum ∆R after 1 year ±10ppm (0.001%) 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/V11 0.1µV/°C Maximum; 0.05µV/°C Typical 1µV/watt 10–7 Atmospheric cc/sec Maximum Bulk Metal® Foil Technology Hermetically Sealed Resistors, Aerospace TABLE 2 - “HZ” SERIES SPECIFICATIONS5 The TCR is obtained by the process capability and does not rely on a selection process. It does not vary from lot to lot nor by ohmic values. +100 +50 -50 -100 -50 -25 0 +25-55 +50 +75 +100 +125 R R (PPM) 0.2PPM/°C

www.vishay.com VHZ Hermetic Vishay Foil Resistors Document Number: 63063 Revision 12-Dec-05 THROUGH HOLE For technical questions, contact: foil@vishay.com SALES FIGURE 2 - POWER DERATING CURVE NOTES: 1. Standard Resistance Tolerance: ± 0.005%; ± 0.01%; 2. Not to exceed power rating of resistor. 3. See Figure 2 below. 4. 0.200" (5.08 mm) lead spacing available for VH102Z, specify VH102ZL. except TCR. (For TCR information see notes 6 -8.) 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. 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. Bulk Metal® Foil Technology Hermetically Sealed Resistors, Aerospace

8 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/R1 – ∆R2/R2) 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. 9. Load life ∆R Maximum can be reduced through in- house procedures. 10. Inductance (L) due mainly to the leads. 11. The resolution limit of existing test equipment (within the measurement capability of the equipment, or “essentially zero.”) 12. µV/°C relates to EMF due to lead temperature difference and µV/watt due to power applied to the resistor. +100 +75 +50 +25 –75 –50 –25 0 +25 +50 +75 +100 +125 +150 +175 +200 Ambient Temperature (°C) Percent of Rated Power @ +125 °C –55°C +200 +70°C Double Rated Power Rated Power +175 +150 +125

Document Number: 63063 Revision 12-Dec-05 www.vishay.com VHZ Hermetic Vishay Foil Resistors THROUGH HOLE For technical questions, contact: foil@vishay.com SALES Resistance Range limit for VHZ555: 4R99 to 121K. TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON See previous page for numbered footnotes. Bulk Metal® Foil Technology Hermetically Sealed Resistors, Aerospace MIL-PRF-55182/9 VH102Z VHZ555 CHARACTERISTIC Y MAXIMUM ∆R TYPICAL5 ∆R TYPICAL5 ∆R Test Group I Thermal Shock ± 0.05% ± 0.002% ± 0.002% Test Group II Resistance Temp Char. ± 5ppm/°C See Table 2 See Table 2 Temp Storage ± 0.05% ± 0.005% ± 0.0025 Low Temp Operation ± 0.05% ± 0.005% ± 0.005% Terminal Strength ± 0.02% ± 0.002% ± 0.002% Test Group III Insulation Resistance 10 4MΩ 40 x 105MΩ 40 x 105MΩ Resistance to Solder Heat ± 0.02% ± 0.002% ± 0.002% Moisture Resistance ± 0.05% ± 0.005% ± 0.005% Test Group IV Vibration ± 0.02% ± 0.002% ± 0.002% Test Group V Life Test @ 0.3 W/+ 125°C Test Group Va + 70°C Power Rating ± 0.05% ± 0.02% ± 0.02% Test Group VI High Temp Exposure ± 0.05% ± 0.05% ± 0.04% Test Group VII Voltage Coefficient 0.0005%/V < 0.00001%/V < 0.00001%/V Please specify Vishay VH102Z and VHZ555 resistors as follows: (See Imprinting Illustration and Table 1, 1st page in this data sheet, for further details). Example: VH102Z 100R01 0.01% MODEL NO. RESISTANCE VALUE 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 LETTER MULTIPLIER RANGE DESIGNATOR FACTOR EXAMPLE 100Ω to < 1KΩ Rx 1 100R01 = 100.01 Ω 1KΩ to < 100KΩ Kx 1 0 3 15K231 = 15.231 Ω TABLE 4 - ORDERING INFORMATION

Document Number: 91000 www.vishay.com Revision: 18-Jul-08 1 Disclaimer Legal Disclaimer Notice Vishay 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 li ability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permit ted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purcha se, 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 medi cal, 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.