248_V01 VISHAY

Document overview

  • Manufacturer or author: Provided By digicamel.com
  • PDF pages: 5

Technical content

248, 249 www.vishay.com Vishay Spectrol Revision: 30-Aug-17 1 Document Number: 57054 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 1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers

FEATURES

  • Model 248: 0.5 W at 70 °C (conductive plastic element)
  • Model 249: 1 W at 70 °C (cermet element)
  • Cost effective panel potentiometer
  • PCB mounting
  • Tests according to CECC 41000 or IEC 60393-1
  • Material categorization: fo r definitions of compliance please see www.vishay.com/doc?99912 QUICK REFERENCE DATA Multiple module No Switch module n/a Detent module n/a Special electrical laws A: linear, L: logarithmic Sealing level IP 50 Lifespan 10K cycles DIMENSIONS in millimeters (inches) ± 0.5 mm (± 0.02") VERSION BUSHING / SHAFT ABCS SHAFT BUSHING SCREWDRIVER ØLØ S L O T (0.335) 2.54 ± 0.25 (0.100 ± 0.010) 12.7 ± 0.4 (0.500 ± 0.016) B 0.36 (0.014) 0.6 (0.024) C A 9.5 (0.375) (0.395) (0.039) 5.08 (0.200) Mounting surface 12.7 ± 0.4 (0.500 ± 0.016) Screwdriver slot shown in mid electrical travel S 0.6 (0.024) 2.54 ± 0.25 (0.100 ± 0.010)

248, 249 www.vishay.com Vishay Spectrol Revision: 30-Aug-17 2 Document Number: 57054 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 Note

  • Hardware supplied in separate bags ELECTRICAL SPECIFICATIONS PARAMETER MODEL 248 MODEL 249 Element type Conducti ve plastic Cermet Total resistance range 500  to 1 M Standard series 1, 2, 5 Resistance tolerance ± 20 % ± 20 % (on request ± 10 %) Power rating Linear 0.5 W at 70 °C 1.0 W at 70 °C Circuit diagram Temperature coefficient of resistance (typical) ± 500 ppm/°C ± 150 ppm/°C Linearity (typical) ± 5 % independent Limiting element voltage 300 V Contact resistance variation (typical) 5 % of the total resistance Insulation resistance 1000 M  minimum, 500 V DC Dielectric strength 750 V RMS minimum 50 Hz / 60 Hz End resistance 2  maximum each end Effective electrical travel 265° ± 5° 0 50 150125 AMBIENT TEMPERATURE IN °C POWER IN W 7025 100 0.5 0 50 150125 AMBIENT TEMPERATURE IN °C POWER IN W 7025 100 CW MECHANICAL SPECIFICATIONS Mechanical travel 295° ± 5° Operating torque 0.1 Ncm to 2 Ncm End stop torque 35 Ncm (50 oz.-inch) Max. tightening torque 150 Ncm Weight 8.3 g (0.29 oz.) (1/4" x 7/8" FMF metal shaft) ENVIRONMENTAL SPECIFICATIONS Temperature range - 55 °C to +125 °C Climatic category 55 / 125 / 4 Sealing IP 50 MARKING
  • V i s h a y m o d e l
  • V i s h a y l o g o
  • V a r i a t i o n l a w
  • SAP code for ohmic value
  • Tolerance in %
  • Date code (4 digits)
  • Terminal identification “3” for lead 3 PACKAGING
  • In box of 25 pieces, code BO25

248, 249 www.vishay.com Vishay Spectrol Revision: 30-Aug-17 3 Document Number: 57054 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 Note

  • Nothing stated herein shall be construed as a guarantee of quality or durability. PERFORMANCE TESTS CONDITIONS TYPICAL VALUES AND DRIFTS FOR 249 RT/RT (%) R1-2/R1-2 (%) OTHER Electrical endurance 1000 h at rated power 90’/30’ - ambient temp. 70 °C ± 3 % ± 5 % Contact res. variation: < 1 % Damp heat, steady state 4 days 40 °C 93 % HR ± 2 % - Dielectric strength: 1000 VRMS Insulation resistance: > 104 M Change of temperature 5 cycl es, -55 °C at +125 °C ± 1 % - V1-2/V1-3  ± 2 % Mechanical endurance 10 000 cycles ± 3 % - Contact res. variation:  2 % Rn Shock 50 g’s at 11 ms 3 successive shocks in 3 directions ± 1 % ± 2 % - Vibration 10 Hz to 55 Hz, 0.75 mm or 10 g’s STANDARD RESISTANCE ELEMENT DATA STANDARD RESISTANCE VALUES

248 LINEAR TAPER 249 LINEAR TAPER

MAX. POWER AT 70 °C MAX. WORKING VOLTAGE MAX. WIPER CURRENT MAX. POWER AT 70 °C MAX. WORKING VOLTAGE MAX. WIPER CURRENT  W V mA W V mA 500 0.5 15.8 32 1 22.4 45 1K 0.5 22.4 22 1 31.6 32 2K 0.5 31.6 16 1 44.7 22 2.5K 0.5 35.4 14 1 50.0 20 5K 0.5 50.0 10 1 70.7 14 10K 0.5 70.7 7 1 100 10 20K 0.5 100 5.0 1 141 7 25K 0.5 112 4.5 1 158 6 50K 0.5 158 3.2 1 224 4 100K 0.5 224 2.2 0.90 300 3.0 200K 0.45 300 1.50 0.45 300 1.5 250K 0.36 300 1.20 0.36 300 1.2 500K 0.18 300 0.60 0.18 300 0.6 1M 0.09 300 0.30 0.09 300 0.3

248, 249 www.vishay.com Vishay Spectrol Revision: 30-Aug-17 4 Document Number: 57054 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 ORDERING INFORMATION (part number) MODEL BUSHING SHAFT SHAFT END SHAFT MATERIAL LEADS PACKAGING RESISTANCE CODE / TOLERANCE / TAPER OR SPECIAL 248 = plastic conductive 249 = cermet element F = Ø 3/8" B = Ø 1/4" Ø L S = slotted R = round F = flatted 0 = metal X = std B25 = box of 25 pieces Resistance: From 501 = 500  to 105 = 1 M Tolerance: M = 20 %; On request: K = 10 % (249 only) Taper: A = linear; L = logarithmic GJ 1/4" 7/8" BH 1/8" 3/4" RELATED DOCUMENTS APPLICATION NOTES Potentiometers and Trimmers www.vishay.com/doc?51001 Guidelines for Vishay Sfernice Resistive and Inductive Components www.vishay.com/doc?52029 G J S0XB 5 5 M82 F4 222 A

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