148, 149 www.vishay.com Vishay Spectrol 1/2 (12.7 mm) Conductive Plastic and Cermet Potentiometer FEATURES Robust construction High rotational life (50 000 cycles) Up to three sections PC support plates Rotary switches and solder lugs terminals available Tests according to CECC 41000 or IEC 60393-1 Material categorization: for definitions of compliance please see www.vishay.com/doc 99912 148 FEATURES click logo to get started DESIGN SUPPORT TOOLS Conductive plastic element Quiet electrical output Models Available 149 FEATURES QUICK REFERENCE DATA Cermet element Multiple module Up to 3 modules Low temperature coefficient ( 150 ppm/C) Switch module Yes Detent module n/a A: linear, L: logarithmic, F: reverse Special electrical laws logarithmic Sealing level IP 64 Lifespan 50K cycles DIMENSIONS in millimeters (inches) 0.5 mm ( 0.02 ) Single, dual or triple Solder lug terminals 12.5 16.45 (0.492) 12.5 (0.648) FMS (0.492) 4.7 8.83 9.52 1.2 0.8 (0.185) (0.375) (0.348) (0.047) (0.031) 8.0 FMS 6.35 (0.315) (0.250) 0.6 (0.024) Thread 1/4 32-NEF-2A 2.54 0.300 0.30 0.9 2.54 (0.012) (0.100) (0.012) (0.035) (0.100) 4.770 7.62 5.07 1.800 (0.188) Thread 3/8 32-NEF-2A (0.300) (0.200) 123 (0.071) 4.65 4.65 (0.183) (0.183) 123 Front and rear support plates E = Flush with board surface 12.5 (0.492) 4.70 (0.185) 0.80 Dual Single (0.031) 1.52 6.35 1.52 (0.06) 2.54 (0.250) 2.54 (0.06) (0.100) 6.35 3.85 (0.100) (0.250) (0.151) 7.62 3.85 5.08 5.08 (0.300) (0.151) (0.200) (0.200) 123 Revision: 12-Apr-18 Document Number: 57040 1 For technical questions, contact: sferpottrimmers 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 0.6 12.50 12.5 (0.024) (0.492) 0.60 (0.492) (0.024) 8.85 (0.341) 3.17 (0.125) 12.5 (0.492) 0.6 (0.024) 2.4 (0.094) 4.900 (0.193) 6.35 (0.250)148, 149 www.vishay.com Vishay Spectrol ELECTRICAL SPECIFICATIONS PARAMETER 148 149 linear 1 k to 1 M 100 to 2 M Resistance range non-linear 500 to 500 k 250 to 1 M linear 10 % 10 % Tolerance non-linear 20 % on request 10 % 10 % Linearity (typical) 5 % independent End resistance 4 maximum each end 0.5 W at 70 C 1 W at 70 C 0 W at 120 C 0 W at 150 C Power rating Non-linear or PC mount, derate 50 % c a Circuit diagram (3) (1) b cw (2) 270 10 without rotary switch Effective rotation 240 10 with rotary switch Contact resistance variation (typical) 1.5 % of total resistance 3 % of total resistance Maximum continuous working voltage 350 V across end terminals, but within power rating AC Dielectric withstanding voltage Sea level -750 V AC MECHANICAL SPECIFICATIONS Mechanical travel 300 5 Operating torque (typical) Single section 0.2 oz. to 3.0 oz. - in dual or triple section 0.3 oz.-inch to 4.5 oz.-inch bushing A and B 2.1 lb-inch max. End stop torque bushing F 6.8 lb-inch max. single 0.19 oz. Weight (approx.) dual 0.27 oz. triple 0.35 oz. electrical elements e3: pure Sn Terminals switch elements e4: gold plated ENVIRONMENTAL SPECIFICATIONS 148 149 Operating temperature -40 C to +125 C -40 C to +125 C Storage temperature -55 C to +125 C -55 C to +125 C Temperature cycling (5 cycles) -40 C to +125 C (4 % R ) -40 C to +125 C (3 % R ) T T Load life (1000 h rated load at 70 C) 10 % R 5 % R T T Mechanical endurance 50 000 cycles TCR (typical) 500 ppm/C 150 ppm/C Sealing IP64 Note Nothing stated herein shall be construed as a guarantee of quality or durability MARKING Vishay logo, SAP code of ohmic value, tolerance in %, variation law, manufacturing date (four digits), 3 for the lead 3, product series (148, 149) Revision: 12-Apr-18 Document Number: 57040 2 For technical questions, contact: sferpottrimmers 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