Model 708 Vishay Spectrol 7/ 8" (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer FEATURES • Virtually infinite resolution • Bushing mount and servo mount types available • Rotational life revolutions exceeds 20 million RoHS COMPLIANT shaft • Co-molded track and multi-finger wiper provide low noise signal • Ohmic value range: 500 Ω to 50 kΩ ELECTRICAL SPECIFICATIONS PARAMETER Total Resistance Standard Range: 500 Ω to 50 kΩ Tolerance: STANDARD ± 10 % SPECIAL ±5% Linearity (Independent) STANDARD ± 0.5 % SPECIAL ± 0.2 % Electrical Angle 340° ± 5° Power Rating Section 1: Additional Sections: 1.0 W at 70° ambient derated to zero at 125 °C 75 % of the rating of section 1 Output Smoothness 0.1 % maximum Insulation Resistance 1000 MΩ minimum, 500 VDC Dielectric Strength 1000 VRMS, 60 Hz from Terminals to shaft Taps (Extra) Extra taps available as special Points at which output is 0.5 aligned ± 1° (ref. to section 1) Phasing Temperature Coefficient of Resistance ± 400 ppm/°C maximum ORDERING INFORMATION/DESCRIPTION The Model 708 can be ordered from this data sheet with a variety of alternate characteristics, as shown. For most rapid service on your order, please state: 708 B 1 10K BO1 MODEL MOUNTING NUMBER OF SECTIONS TOTAL RESISTANCE OF EACH SECTION PACKAGING B: Bushing S: Servo Up to 6 Beginning with the section nearest the mounting end Box of 1 piece Other characteristics will be standard as described on this data sheet. If special characteristics are required, such as: special linearity tolerance, special resistance tolerance, extra taps, non-linear functions, etc., please state these on your order and allow additional lead time for delivery. SAP PART NUMBERING GUIDELINES 708 S 2 102 103 B01 MODEL STYLE GANGS OHMIC VALUE GANG NO 1 OHMIC VALUE GANG NO 2 PACKAGING B: Bushing S: Servo From 1 up to 6 1K 10K Document Number: 57070 Revision: 02-Jul-07 For technical questions, contact: [email protected] www.vishay.com 41 Model 708 7/ Vishay Spectrol 8" (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer DIMENSIONS in inches (millimeters) BUSHING MOUNT: 708 B ± 0.010 ± 0.031 0.687 (17.45) 1 0.500 (12.70) 0.250 (6.35) 0.308 MIN. (7.82) TYP. 3 ± 0.015 1 30° TYP. 2 0.062 (1.57) 3/ 8 - 32 UNEF -2A + 0.0000 - 0.0010 ± 0.015 Ø 0.875 (22.22) Ø 0.4062 (10.32) 0.640 R MAX. (16.26) + 0.0000 Ø 0.1248 - 0.0003 (3.17) MTG. FACE SERVO MOUNT: 708 S ± 0.010 ± 0.031 0.687 (17.45) 1 0.500 (12.70) 0.062 (1.57) 0.062 (1.57) 0.062 (1.57) ± 0.015 Ø 0.875 (22.22) 2 + 0.0000 Ø 0.750 MAX. (19.05) Ø 0.7500 - 0.0005 (19.05) Ø 0.875 (22.22) CW 3 1 + 0.0000 SCHEMATIC Ø 0.1248 - 0.0003 (3.17) MTG. FACE TOLERANCES: UNLESS OTHERWISE NOTED. DECIMALS ± 0.005 ANGLES ± 2° 1 ADD 0.500 ± 0.002 (12.70) FOR EACH ADDITIONAL SECTION MECHANICAL SPECIFICATIONS PARAMETER Rotation 360° continuous Bearing Type Servo Mount: Bushing Mount: Ball bearing Sleeve bearing Torque (Maximum) Servo, 1 Section Bushing, 1 Section Each Additional Section STARTING 0.10 oz. - in (7.20 g - cm) 0.25 oz. - in (18.00 g - cm) 0.10 oz. - in (7.20 g - cm) RUNNING 0.085 oz. - in (6.12 g - cm) 0.20 oz. - in (14.40 g - cm) 0.075 oz. - in (5.40 g - cm) Runouts (Maximum) Shaft Runout (TIR/in) Pilot Dia. Runout (TIR) Lateral Runout (TIR) Shaft End Play Shaft Radial Play SERVO 0.002" (0.05 cm) 0.002" (0.05 cm) 0.002" (0.05 cm) 0.005" (0.13 cm) 0.002" (0.05 cm) BUSHING 0.002" (0.05 cm) 0.002" (0.05 cm) 0.005" (0.13 cm) 0.005" (0.13 cm) 0.004" (0.10 cm) Weight (Maximum) Single Section: Each Additional Section: Ganging Moment of Inertia www.vishay.com 42 0.6 oz. (17.0 g) 0.2 oz. (5.67 g) 6 sections max, terminal alignment, added sections within ± 10° of section 1 terminals 0.12 g - cm2 per section maximum For technical questions, contact: [email protected] Document Number: 57070 Revision: 02-Jul-07 Model 708 7/ " 8 (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer Vishay Spectrol MATERIAL SPECIFICATIONS ENVIRONMENTAL SPECIFICATIONS Housing and Lids Vibration Aluminum, anodized 15 g thru 2000 Hz Shaft Stainless steel, non-magnetic non-passivated Shock Terminals Brass plated for solderability Rotational Life Bushing Mount Hardware Lockwasher Internal tooth: Panel Nut: Steel, nickel plated Brass, nickel plated 50 g Salt Spray 96 h Load Life Servo: 20 million shaft revolutions Bushing: 5 million shaft revolutions 900 h Temperature Range - 55 °C to + 125 °C MARKING Unit Identification Units shall be marked with Spectrol name, model no, and data code, and on each section, resistance, resistance tolerance, linearity and terminal identification POWER RATING CHART RESISTANCE ELEMENT DATA RATED POWER IN W (Ratings for cup No. 1. Additional cups 75 % of values shown) 2.0 1.5 RESISTANCE VALUES (Ω) MAXIMUM VOLTAGE APPLICABLE (V) 500 22 1K 32 2K 45 5K 71 10K 100 20K 141 50K 224 1.0 0.5 0 20 40 60 80 100 120 140 160 AMBIENT TEMPERATURE IN °C Document Number: 57070 Revision: 02-Jul-07 For technical questions, contact: [email protected] www.vishay.com 43 Legal Disclaimer Notice Vishay Disclaimer 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 liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, 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 medical, 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. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1