1 5 / 16 " (33.3 mm) industrial single turn, bushing mount, conductive plastic model 138 vishay spectrol www.vishay.com for technical questions, contact: sfer@vishay.com document number: 57033 12 revision: 17-may-10 features ? center tap available ? continuous rotation and mechanical stops both standard ? suitable model for all types of industrial applications ? compliant to rohs directive 2002/95/ec electrical specifications parameter mil-prf-39023 test procedures apply standard special ohmic value range 1 k to 50 k 1 k to 50 k tolerance 10 % 5 % linearity (independent) standard best practical 0.5 % 0.25 % output smoothness 0.1 % maximum power rating 40 c ambient 2 w derated to zero at 125 c electrical angle continuous 345 4 stops 340 5 insulation resistance 1000 m minimum at 500 v dc dielectric strength 1000 v rms , 60 hz absolute minimum resistance 1.0 % of total resistance minimum voltage 0.5 % maximum temperature coefficient of resistance 600 ppm/c maximum material specifications housing molded glass filled thermoplastic rear lid glass filled thermoset plastic shaft stainless steel, non-magnetic terminals brass, plated for solderability, non-passivated mount hardware lockwasher internal tooth: panel nut: steel, nickel plated brass, nickel plated environmental specifications vibration 15 gs thru 2000 hz shock 50 g salt spray 48 h rotational life 2 million shaft revolutions operating temperature range - 55 c to + 125 c ordering information/description 138 b 0 0 20k bo10 model bushing mount mechanical options other optional features resistance code packaging 0. continuous 2. stops 0. standard (end taps) 1. center tap (within 5 of electrical center) box of 10 pieces other characteristics will be standard as des cribed on this specificati on sheet. if special characteri stics are required such a s special linearity tolerance, special resistance tole rance, non-linear functi ons, etc., please state these on your order. sap part numbering guidelines 138 b 2 1 103 b10 model style mechanical options features ohmic value packaging with stops with center tap box of 10 pieces
model 138 1 5 / 16 " (33.3 mm) industrial single turn, bushing mount, conductive plastic vishay spectrol document number: 57033 for technical questions, contact: sfer@vishay.com www.vishay.com revision: 17-may-10 13 dimensions in inches (millimeters) 0.031 0. 8 75 (22.22) ? 0.4062 mtg. (10.32) + 0.0000 - 0.0020 0.032 (0. 8 1) ? 0.2497 (6.34) 0.030 max. (0.76) + 0.0000 - 0.0003 0.562 (14.27) 0.032 (0. 8 1) 3 / 8 - 32 unef - 2a ? 0.125 (3.1 8 ) 0.062 (1.57) mtg. surface 0.062 (1.57) 0.625 (15. 88 ) 0.015 0.1 8 7 (4.75) 0.015 60 0.015 ? 0.500 (12.70) bc 0.375 (9.52) 0.015 0.010 tolerances: unless otherwise noted. decimals 0.005 angles 2 cw schematic 2 3 1 ? 1.312 (33.32) 0.015 mechanical specifications parameter rotation 360 (continuous) 340 5 stops bearing type sleeve torque (maximums) starting 1.0 oz. - in (72 g - cm) running 0.7 oz. - in (50.40 g - cm) runouts (maximums) shaft runout (tir) 0.002" (0.05 mm) pilot dia. runout (tir) 0.003" (0.08 mm) lateral runout (tir) 0.005" (0.13 mm) shaft end play 0.008" (0.20 mm) shaft radial play 0.003" (0.08 mm) weight 1.0 oz. maximum (28.35 g) stop strength 8.0 in - lbs (9.21 kg - cm) (stops version only) power rating chart 0 204060 8 0 100 120 140 ambient temperature in c rated power in w 6.0 5.0 4.0 3.0 2.0 1.0 marking unit identification units shall be marked wi th vishay spectrol name, model number, resistance and tolerance, linearity, terminal identification, and data code applicable test procedures: mil-r-39023
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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