document number: 57061 revision 20-nov-01 www.vishay.com 86 model 402 vishay spectrol 3 (76.2mm) single turn wirewound precision potentiometer features ?0 ? to 100k ? bushing mount or servo mount ordering information the model 402 can be ordered from this specification sheet with a variety of alternate characteristics, are shown above. for mo st rapid service on your order, please sate: 402 1 1 xxx model mounting number of sections total resistance of each section 1 . bushing beginning with the section nearest the 2 . servo mounting end 3 . screw electrical specifications parameter standard special total resistance 10 ? to 100k ? 150k ? tolerance: 100 ? and above 3% 1% below 100 ? : 5% 3% absolute minimum resistance linearity x total resistance or 0.5 ? whichever is greater end voltage linearity x total applied voltage for total resistance above 20 ? , 2.0% of total applied voltage for 20 ? and below linearity (independent) standard best practical total resistance 10 ? to 200 ? 0.50% 0.25% 200 ? to 2k ? 0.25% 0.15% 2k ? to 10k ? 0.25% 0.10% 10k ? and above 0.25% 0.075% noise 100 ? enr rotation 350 2 power rating section 1: 6.0 watts at 70 c ambient derated to zero at 125 c additional sections: 75% of the rating of section 1, (4.5 watts at 70 c) insulation resistance 1000m ? minimum, 500 vdc dielectric strength 1000v rms , 60hz taps (extra) 37 available as special, standard tolerance 1 phasing (ccw end points) additional sections phased to section 1 within 1
www.vishay.com 87 model 402 vishay spectrol document number: 57061 revision 20-nov-01 3?(76.2mm) single turn wirewound precision potentiometer dimensions in inches (millimeters) mechanical specifications parameter rotation 360 (continuous) bearing type servo & screw mount: ball bearing bushing mount sleeve bearing ganging 6 sections maximum terminal alignment, added sections, within 10 of section 1 terminals torque (maximum) mounting: starting running servo or screw 1 section 1.1 oz - in (79.21gm - cm) 0.6 oz - in (43.20gm - cm) bushing 1 section 1.9 oz - in (136.82gm - cm) 1.1 oz - in (79.21gm - cm) each additional section 0.8 oz - in (57.61gm - cm) 0.5 oz - in (36.00gm - cm) runouts (maximums) servo bushing shaft (tir/in) 0.002 in (0.05cm) 0.002 in (0.05cm) pilot dia (tir) 0.002 in (0.05cm) 0.002 in (0.05cm) lateral (tir) 0.004 in (0.10cm) 0.005 in (0.13cm) shaft end play 0.005 in (0.13cm) 0.005 in (0.13cm) shaft radial play 0.002 in (0.05cm) 0.003 in (0.08cm) moment of inertia 4.0gm - cm 2 per section maximum weight (maximums) single section: 7.0 oz (198,45gm) each additional section: 2.0 oz (56,70gm) 0.625 (15.88) 0.031 0.800 (20.32) 0.010 ? 0.7500 (19.05) mtg + 0.0000 - 0.0005 ? 0.2497 (6.34) + 0.0000 - 0.0003 (76.20) 0.015 mtg. face 9 typ 45 5 1.640 r (41.66) max ? 2.250 b.c (57.15) 1.700 r max (43.18) 1 2 3 8-32 unc - 2b 0.187 0.015 deep (4.15) 3 holes equally spaced (screw mount only) 0.062 (1.57) 1 ? 3.000 screw mount 3.000 (76.20) 0.15 mtg. face mtg. face 1 1 ? 2.812 max. (71.42) 0.831 (21.11) 0.010 0.625 (15.83) 0.031 0.073 min (1.85) ? 0.2497 (6.34) ? 3.000 (76.20) ? 2.8750 mtg. (73.02) + 0.0000 - 0.0003 ? 3.000 (76.20) .015 .010 .015 1 add 0.500 (12.70) for each additional section. 1/2-32 unef-2a .002 servo mount bushing mount 0.705 (17.91) 0.875 (22.22) + 0.0000 - 0.0003 0.2497 (6.34) + 0.0000 - 0.0010 0.239 min (6.07) 0.375 (9.52) 0.062 (1.57) 0.340 min (8.64) 1 3 2 schematic cw 0.312 min (7.92) ? 0.5937 mtg. (15.08) 0.031 0.062 (1.57) + 0.0000 - 0.0003 0.093 (2.36) 0.0005
document number: 57061 revision 20-nov-01 www.vishay.com 88 model 402 vishay spectrol unit units shall be marked with spectrol name, model no, data code and on each section, resistance, resistance tolerance, identification linearity and terminal identification marking maximum maximum current voltage wire resistance reso- ohms at 70 c across temp. values lution per ambient coil coef. ( ? ) (%) turn (ma ) (v) (ppm/ c) 10 0.160 0.016 775 7.74 800 20 0.120 0.024 548 10.9 800 50 0.094 0.047 347 17.3 800 100 0.106 0.106 245 24.5 20 200 0.091 0.181 173 34.7 20 500 0.072 0.361 110 54.5 20 1k 0.057 0.575 77.5 77.4 20 2k 0.056 1.12 54.8 109 20 5k 0.042 2.09 34.6 173 20 10k 0.034 3.42 24.5 245 20 20k 0.025 5.07 17.3 347 20 50k 0.019 9.41 11.0 545 20 100k 0.018 18.0 7.74 775 20 150k 0.023 34.4 6.32 949 20 resistance element data power rating chart (ratings for cup no. 1. additional cups 75% of values shown) 20 40 60 80 100 120 140 160 standard 125 c special 150 c 0 2 4 6 8 10 ambient temperature in c rated power in (w atts) environmental vibration 15g thru 2000 cps shock 50g salt spray 96 hours rotational life 1 million shaft revolutions load life 900 hours temperature range -55 c + 125 c moisture resistant materials housing and lids aluminum, anodized shaft and clamp rings stainless steel, non-magnetic, non-passivated terminals brass, plated for solderability brushing mount hardware lockwasher internal tooth: steel, nickel plated panel nut: brass, nickel plated 3?(76.2mm) single turn wirewound precision potentiometer
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