208 VISHAY

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www.vishay.com Vishay Spectrol Revision: 22-Nov-16 1 Document Number: 57053 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 1 3/4" (44.5 mm) Single Turn Conductive Plastic Precision Potentiometer

FEATURES

  • Rotational life exceeds 20 million shaft revolutions
  • Virtually infinite resolution
  • Designed for high reliability applications
  • Co-molded track and multi-finger wiper provide low noise signal
  • Bushing or servo types available up to 6 sections
  • Ohmic value range: 1 k 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 1 ¾" (44.5 mm) ELECTRICAL SPECIFICATIONS PARAMETER Total resistance tolerance STANDARD 1 k to 50 k ± 10 % SPECIAL ± 5 % Linearity (independent) STANDARD ± 0.3 % SPECIAL ± 0.1 % Electrical angle 350° ± 3° Power rating: Section 1: Additional sections

1.75 W at 70 °C 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 Taps (extra) Extra taps available as special Phasing Points at which output ratio is 0.5 aligned ± 1° (ref. to section 1) Temperature coefficient of resistance ± 600 ppm/°C maximum

ORDERING INFORMATION

MODEL STYLE GANGS OHMIC VALUE GANGS No 1 OHMIC VALUE GANGS No 2 SPECIAL REQUEST

208 B: bushing

S: servo 470 = 47  222 = 2.200  103 = 10 k For ohmic value range see electrical specification 470 = 47  222 = 2.200  103 = 10 k For ohmic value range see electrical specification xxxx PART NUMBER DESCRIPTION (for information only) 208- 2 1 502 203 xxxx MODEL STYLE GANGS OHMIC VALUE GANGS No 1 OHMIC VALUE GANGS No 2 SPECIAL B: 1 S: 2

www.vishay.com Vishay Spectrol Revision: 22-Nov-16 2 Document Number: 57053 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 Ball bearing BUSHING MOUNT Sleeve bearing Ganging 6 sections maximum terminal alignment, added sections within ± 10° of section 1 terminals Torque (maximums) Servo section 1 Bushing section 1 Each additional section STARTING 0.7 oz. - in (50.40 g - cm) 1.0 oz. - in (72.0 g - cm) 0.4 oz. - in (28.80 g - cm) RUNNING 0.4 oz. - in (28.80 g - cm) 0.7 oz. - in (50.40 g - cm) 0.3 oz. - in (21.60 g - cm) Mechanical runouts (maximums): Shaft (TIR/in) Pilot dia. (TIR) Lateral (TIR) Shaft end play Shaft radial play SERVO 0.002" (0.05 cm) 0.002" (0.05 cm) 0.003" (0.08 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) 0.003" (0.08 cm) Moment of inertia 1.0 g - cm 2 per section maximum Weight: Single section Each additional section 3.0 oz. (85.05 g) 1.0 oz. (28.35 g) SERVO MOUNT: 208S/208-2 0.831 (21.10) ± 0.010 0.625 (15.88) ± 0.031 0.073 MIN. (1.85) Ø 1.5620 (39.67) + 0.0000 - 0.0005 Ø 1.750 (44.45) Ø 0.2497 (6.34) + 0.0000 - 0.0003 0.062 (1.57) MTG. FACE Ø 1.750 (44.45) ± 0.015 Ø 1.562 MAX. (39.67) 0.093 (2.36) 0.340 MIN. (8.64) 45° 16° 20° TYP. 1.015 R MAX. (25.78) BUSHING MOUNT: 208B/208-1 0.875 (22.22) ± 0.031 0.375 (9.52) ± 0.015 3/8 - 32 UNEF - 2A Ø 0.2497 (6.34) + 0.0000 - 0.0003 Ø 1.750 (44.45) ± 0.015 Ø 1.000 (25.40)Ø 0.4062 (10.32) + 0.0000 - 0.0010 MTG. FACE 0.010 (0.25) 0.062 (1.57) 0.239 MIN. (6.07) 0.705 (17.91) ± 0.010 1.075 R MAX. (27.30) ± 5° 1 ADD 0.500 ± 0.002 (12.70) FOR EACH ADDITIONAL SECTION TOLERANCES: UNLESS OTHERWISE NOTED. DECIMALS ± 0.005 ANGLES ± 2° CW SCHEMATIC

www.vishay.com Vishay Spectrol Revision: 22-Nov-16 3 Document Number: 57053 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 POWER RATING CHART (Ratings for cup No. 1. Additional cups 75 % of values shown) Note

  • Nothing stated herein shall be construed as a guarantee of quality or durability. MATERIAL SPECIFICATIONS Housing and lids Aluminum, anodized Shaft and clamp rings 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 MARKING Unit identification Units shall be marked with Spectrol name, model number and data code on each section, resistance, resistance tolerance, linearity and terminal identification. Example of a marking for a standard part: 208-12502 103AMBIENT TEMPERATURE IN °C 20 40 60 80 100 120 140 160 RATED POWER IN W 0.5 1.0 1.5 2.0 2.5 3.0 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 Operating temperature range -55 °C to +125 °C RESISTANCE ELEMENT DATA RESISTANCE VALUES () MAXIMUM VOLTAGE APPLICABLE (V) 1K 42 2K 59 5K 94 10K 132 20K 187 50K 299

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