www.vishay.com 77 vhz hermetic v ishay foil resistors document number: 63063 revision 12-dec-05 through hole for technical questions, contact: foil@vishay .com sales ?americas: foilsales.usa@vishay .co m ?asia/japan: foilsales.asia@vishay .com ?uk/holland/scandinavia: foilsales.eunorth@vishay .com ?germany/czech republic/austria: foilsales.eucentral@vishay .com france/switzerland/southern europe: foilsales.eusouth@vishay .com israel: foilsales.israel@vishay .com 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 ( ? )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 1.0 300 0.6 w 0.3 w 1.4 h 0.430 maximum** 10.92 maximum VHZ555 30.1 to 121k 0.005 1.0 ll 1 0.125 25.4 3.18 20 to < 30.1 0.01 1.0 ls 0.150 0.010 4 3 .81 0.25 4.99 to < 20 0.05 1.0 st 0.095 maximum 2.41 maximum ls model number vishay xxxx vh102z st h l date code w front view rear view lead material #22 awg round solder coated copper resistance v alue code t olerance serial no. (optional marking) 100r01 0.01% xxxx 10 w eek 01 y ear 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 78 vhz hermetic v ishay foil resistors through hole for technical questions, contact: foil@vishay .com sales ?americas: foilsales.usa@vishay .co m ?asia/japan: foilsales.asia@vishay .com ?uk/holland/scandinavia: foilsales.eunorth@vishay .com ?germany/czech republic/austria: foilsales.eucentral@vishay .com france/switzerland/southern europe: foilsales.eusouth@vishay .com israel: foilsales.israel@vishay .com temperature coefficient of resistance nominal tcr 6 (- 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) selected 7 tcr tracking 8 (closest spread) stability 9 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) v oltage coefficient thermal emf 12 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 0.025% 0.015% at 0.3w/+ 125 c 0.005% 0.0025 at 0.1w/+ 80 c 0.02% 0.01% at 0.05w/+ 125 c 5ppm (0.0005%) maximum ? r after 1 year 10ppm (0.001%) maximum ? r after 3 years < 0.010 v (rms)/volt of applied voltage (?40db) 1.0 ns at 1k ? 0.1 h maximum; 0.08 h typical 1.0pf maximum; 0.5pf typical < 0.1ppm/v 11 0.1 v/ c maximum; 0.05 v/ c typical 1 v/watt 10 ? atmospheric cc/sec maximum bulk metal foil technology hermetically sealed resistors, aerospace table 2 - ?z?series specifications 5 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 0 -50 -100 -50 -25 0 +25 -55 +50 +75 +100 +125 r r (ppm) 0.2ppm/c
www.vishay.com 79 vhz hermetic v ishay foil resistors document number: 63063 revision 12-dec-05 through hole for technical questions, contact: foil@vishay .com sales ?americas: foilsales.usa@vishay .co m ?asia/japan: foilsales.asia@vishay .com ?uk/holland/scandinavia: foilsales.eunorth@vishay .com ?germany/czech republic/austria: foilsales.eucentral@vishay .com france/switzerland/southern europe: foilsales.eusouth@vishay .com israel: foilsales.israel@vishay .com figure 2 - power derating curve 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 for vh102z, specify vh102zl. 5. maximum is 1.0% a.q.l. standard for all specifications except tcr. (for tcr information see notes 6 -8.) t ypical 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. v ishay 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 (?nstrument?range); and from ?55 c to + 25 c and + 25 c to + 125 c (?ilitary 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 /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. 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 ?ssentially zero.? 12. v/ c relates to emf due to lead temperature difference and v/watt due to power applied to the resistor. +100 +75 +50 +25 0 ?5 ?0 ?5 0 +25 +50 +75 +100 +125 +150 +175 +200 ambient temperature ( c) p ercent of rated power @ +125 c ?5 c +200 +70 c double rated power rated power +175 +150 +125
document number: 63063 revision 12-dec-05 www.vishay.com 80 vhz hermetic v ishay foil resistors through hole for technical questions, contact: foil@vishay .com sales ?americas: foilsales.usa@vishay .co m ?asia/japan: foilsales.asia@vishay .com ?uk/holland/scandinavia: foilsales.eunorth@vishay .com ?germany/czech republic/austria: foilsales.eucentral@vishay .com france/switzerland/southern europe: foilsales.eusouth@vishay .com israel: foilsales.israel@vishay .com **resistance range limit for VHZ555: 4r99 to 121k. t able 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 typical 5 ? r typical 5 ? r t est group i thermal shock 0.05% 0.002% 0.002% overload 0.05% 0.003% 0.003% t est group ii resistance temp char. 5ppm/ c see table 2 see table 2 t emp storage 0.05% 0.005% 0.0025 low temp operation 0.05% 0.005% 0.005% t erminal strength 0.02% 0.002% 0.002% t est group iii dwv 0.02% 0.005% 0.002% insulation resistance 10 4 m ? 40 x 10 5 m ? 40 x 10 5 m ? resistance to solder heat 0.02% 0.002% 0.002% moisture resistance 0.05% 0.005% 0.005% t est group iv shock 0.01% 0.002% 0.002% v ibration 0.02% 0.002% 0.002% t est group v life test @ 0.3 w/+ 125 c 2,000 hours 0.05% 0.03% 0.01% 10,000 hours 0.5% 0.05% 0.02% t est group va + 70 c power rating 0.05% 0.02% 0.02% t est group vi high temp exposure 0.05% 0.05% 0.04% t est group vii v oltage 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 100 ? to < 1k ? rx 1 100r01 = 100.01 ? 1k ? to < 100k ? kx 10 3 15k231 = 15.231 ? t able 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 fo r 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 describ ed 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.
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