708 VISHAY

Document overview

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Technical content

www.vishay.com Vishay Spectrol Revision: 27-Mar-15 1 Document Number: 57070 For technical questions, contact: sferprecisionpot@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 7/8" (22.2 mm) Single Turn Conductive Plastic Precision Potentiometer

FEATURES

  • Virtually infinite resolution
  • Bushing mount and servo mount types available
  • Rotational life exceeds 20 million shaft revolutions
  • Co-molded track and multi-finger wiper provide low noise signal
  • Ohmic value range: 500  to 50 k
  • Material categorization: fo r definitions of compliance please see www.vishay.com/doc?99912 QUICK REFERENCE DATA Sensor type ROTATIONAL , conductive plastic Output type Output by turrets Market appliance Professional Dimensions 7/8" (22.2 mm) ELECTRICAL SPECIFICATIONS PARAMETER Total resistance standard range 500  to 50 k 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 M  minimum, 500 V DC Dielectric strength 1000 V RMS , 60 Hz from terminals to shaft Taps (extra) Extra taps available as special Phasing Points at which output is 0.5 aligned ± 1° (ref. to section 1) Temperature coefficient of resistance ± 600 ppm/°C maximum ORDERING INFORMATION/DESCRIPTION The Model 708 can be ordered from this datasheet 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 datasheet. 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

www.vishay.com Vishay Spectrol Revision: 27-Mar-15 2 Document Number: 57070 For technical questions, contact: sferprecisionpot@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 DIMENSIONS in inches (millimeters) 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: 0.6 oz. (17.0 g) 0.2 oz. (5.67 g) Ganging 6 sections max, terminal alignment, adde d sections within ± 10° of section 1 terminals Moment of inertia 0.12 g - cm 2 per section maximum SERVO MOUNT: 708S/708-2 BUSHING MOUNT: 708B/708-1 0.687 (17.45) ± 0.010 0.500 (12.70) ± 0.031 0.062 (1.57) Ø 0.875 (22.22) Ø 0.7500 (19.05) + 0.0000 - 0.0005 Ø 0.1248 (3.17) + 0.0000 - 0.0003 MTG. FACE Ø 0.875 (22.22) ± 0.015 Ø 0.750 MAX. (19.05) 0.062 (1.57) 0.687 (17.45) ± 0.031 0.500 (12.70) ± 0.010 0.250 (6.35) ± 0.015 3/8 - 32 UNEF -2A Ø 0.875 (22.22) Ø 0.4062 (10.32) ± 0.015 + 0.0000 - 0.0010 Ø 0.1248 (3.17) + 0.0000 - 0.0003 MTG. FACE 0.062 (1.57) 0.308 MIN. (7.82) TYP. 30° TYP. 0.640 R MAX. (16.26) 1 ADD 0.500 ± 0.002 (12.70) FOR EACH ADDITIONAL SECTION TOLERANCES: UNLESS OTHERWISE NOTED. DECIMALS ± 0.005 ANGLES ± 2° CW SCHEMATIC 0.062 (1.57)

www.vishay.com Vishay Spectrol Revision: 27-Mar-15 3 Document Number: 57070 For technical questions, contact: sferprecisionpot@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Note

  • Nothing stated herein shall be construed as a guarantee of quality or durability. POWER RATING CHART (Ratings for cup No. 1. Additional cups 75 % of values shown) MATERIAL SPECIFICATIONS Housing and lids Aluminum, anodized Shaft Stainless steel, non-magnetic non-passivated Terminals Brass plated for solderability Bushing mount hardware Lockwasher internal tooth: Panel nut: Steel, nickel plated Brass, nickel plated ENVIRONMENTAL SPECIFICATIONS Vibration 15 g thru 2000 Hz Shock 50 g Salt spray 96 h Rotational life Servo: 20 million shaft revolutions Bushing: 5 million shaft revolutions Load life 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. Example of a marking for a standard part: 708-22102103 20 40 60 80 100 120 140 160 AMBIENT TEMPERATURE IN °C 0.5 1.0 1.5 2.0 RATED POWER IN W RESISTANCE ELEMENT DATA RESISTANCE VALUES () MAXIMUM VOLTAGE APPLICABLE (V) 500 22 1K 32 2K 45 5K 71 10K 100 20K 141 50K 224

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