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249D908103E3 Datasheet(PDF) 2 Page - Vishay Siliconix |
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249D908103E3 Datasheet(HTML) 2 Page - Vishay Siliconix |
2 / 3 page www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57054 112 Revision: 02-Jul-07 248, 249 Vishay Spectrol 1/2" (12.7 mm) Conductive Plastic & Cermet Potentiometers MECHANICAL SPECIFICATIONS Rotation 295° ± 5° Torque Starting and Running 1.5 to 18.75 mNm End Stop Torque 0.35 Nm (50 oz-in) Weight 8.3 g’s (0.29 oz) (1/4" × 7/8" FMF metal shaft) Max Tightening Torque 0.50 Nm (1/4" Bush) 0.70 Nm (3/8" Bush) Sealing IP50 ENVIRONMENTAL SPECIFICATIONS Temperature Range - 55 °C to + 125 °C Shock 390 meters/sec/sec. 1000 bumps Vibrations 98 meters/sec/sec. 0.75 mm, 10 to 500 Hz Rotational Life (Electrical) 25 000 cycles Load Life at 70 °C 1000 hours MARKING Unit identification: Manufacturer’s name and model number, EIA resistance value coding, tolerance, data code and terminal Identification. ELECTRICAL SPECIFICATIONS PARAMETER MODEL 248 MODEL 249 Element Type conductive plastic cermet Total Resistance Range 500 Ω to 1 MΩ Resistance Tolerance ± 20 % ± 20 % (on request ± 10 %) Power rating 0.5 W at 70 °C 1.0 W at 70 °C Both derated to zero at 125 °C Temperature Coefficient of Resistance ± 1000 ppm/°C ± 100 ppm/°C Linearity Tolerance ± 5 % Independent Contact Resistance Variation 5 % of the Total Resistance Insulation Resistance 1000 M Ω minimum, 500 VDC Dielectric Strength 750 VRMS minimum 50/60 Hz End Resistance 2 Ω maximum each end Effective Electrical Angle 265° ± 5° STANDARD RESISTANCE ELEMENT DATA Ω 248/249: 500R, 1K, 2K, 5K, 10K, 25K, 50K, 100K, 250K, 500K, 1M PACKAGING Carton box of 50, code: BO50 ORDERING INFORMATION 248 MODEL JE SPECIAL FEATURES 8 SHAFT OPTIONS 08 FMF SHAFT OPTIONS 103 EIA RESISTANCE CODE e3 LEAD FINISH 248/249 D: Rear locating lugs E: Rear stand off J: CW audio taper 7: 6.35 (1/4") plastic 8: 3.18 (1/8") plated brass 9: 6.35 (1/4") plated brass 08: 19.05 (3/4") for 3.18 (1/8") plated brass 10: 22.22 (7/8") for 6.35 (1/4") plated brass or plastic versions e3: pure Sn Example: 248 - JE - 8 - 08 - 103 SAP PART NUMBERING GUIDELINES 24 8 B BH S 0 E B 25 1 0 3 M L MODEL SHAFT PACKAGING OHMIC VALUE/TOL/LAW OR SPECIAL See the end of this data book for conversion tables SHAFT MATERIAL LEADS BUSHING |
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