MP30 Vishay Angstrohm Power Rheostats 150 Watt FEATURES • • • • • • Diameter 4" [101.60mm] Depth behind panel 1 3/4" [44.45mm] Shaft 1/4" [6.35mm] diameter Rotation 300° ± 5° and weight 1.014 pounds (460 grams) Total ohms available in higher ranges up to 25,000 ohms Mounts on panels up to 1/4" [6.35mm] by means of a 3/8" [9.52mm], 32 bushing and hex nut • Non-turn lugs require 3/16" [4.76mm] hole, 1/2" [12.70mm] below center of shaft Model"A" shaft • U. L. Approved TOTAL OHMS MAXIMUM AMPS APPROXIMATE STEPS 0.5 17.350 35 1.0 12.247 39 2.0 8.660 39 3.0 7.071 70 5.0 5.477 73 7.5 4.472 70 10.0 3.873 70 15.0 3.162 120 25.0 2.449 152 50.0 1.732 190 DIMENSIONS in inches [millimeters] 7/8 [22.22] 1 3/4 [44.45] 4 [101.60] Dia. 1/2 [12.70] 1/16 [1.59] 2 7/16 [61.91] (3) .169 [4.29] Holes Knob # 552 3/8 [9.52] 1 1/2 [38.10] 3/4 [19.05] 1/4 [6.35] 3/8 [9.52] 3/32 [2.38] 2 1/2 [63.50] R 75.0 1.414 228 100.0 1.225 228 200.0 0.866 265 300.0 0.707 303 400.0 0.612 342 500.0 0.548 342 DERATING 750.0 0.447 418 1000.0 0.387 432 2000.0 0.274 575 2500.0 0.244 456 5000.0 0.173 865 7500.0 0.141 1000 Angstrohm rheostat standard wattage ratings are based on a 300°C rise in “free-air” in ambient not exceeding + 40°C (shown). For other applications, wattage ratings are available based on 340°C rise in "free-air" in ambient not exceeding + 25°C, and in other cases + 50°C. 10000.0 0.122 1000 7/32 [5.56] Dial # 548 2 1/4 [57.15] 120 % OF RATED LOAD RESISTANCE VALUES* 100 80 60 40 20 0 40 100 150 200 250 300 AMBIENT TEMP. DEG. CENTIGRADE 350 * All other intermediate resistance values are available and can be manufactured on a normal delivery cycle. MARKING — Resistance value — Amps ORDERING INFORMATION MP30 MODEL A BUSHING AND SHAFT CONFIGURATION 25 VALUE A = Standard Flatted Shaft — Date code NOTE: For Additional Features: Submit detailed drawing information when ordering “non-standard” parts. Document Number: 66105 Revision 25-Aug-00 www.vishay.com 7 Legal Disclaimer Notice Vishay Notice Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Vishay for any damages resulting from such improper use or sale. Document Number: 91000 Revision: 08-Apr-05 www.vishay.com 1