Spectrol Features • • • • • Phosphor bronze, solder plated terminals Available in 1/8” and 1/4” shaft diameter 1/4” plastic shaft types Plastic flame retardant housing Available in audio taper (J types) 249 Series Potentiometer − 1 Watt, 1/2” square 1/8” and 1/4” dia. shaft P9 .300 (7.6) L .500 (12.7) .125 (3.17) Dia .375 (9.52) .500 (12.7) 1/4−32 NEF−2A .250 (6.34) 1 2 3 .016 (0.41) .014 (0.36) .200 (5.08) NTE Part No. Value (Ohms) Shaft Length Diag No. 249−7−10−501 502−0164 500 7/8” P10 249−8−08−501 502−0064 500 3/4” P9 249−7−10−102 502−0165 1K 7/8” P10 249−8−08−102 502−0065 1K 3/4” P9 249−J−8−08−102 502−0180 1K 3/4” P9 249−J−9−10−102 502−0185 1K 7/8” P10 249−7−10−252 502−0166 2.5K 7/8” P10 249−8−08−252 502−0066 2.5K 3/4” P9 249−7−10−502 502−0167 5K 7/8” P10 249−8−08−502 502−0067 5K 3/4” P9 249−7−10−103 502−0168 10K 7/8” P10 249−8−08−103 502−0068 10K 3/4” P9 249−J−8−08−103 502−0181 10K 3/4” P9 249−J−9−10−103 502−0186 10K 7/8” P10 249−7−10−253 502−0169 25K 7/8” P10 249−8−08−253 502−0069 25K 3/4” P9 249−7−10−503 502−0170 50K 7/8” P10 Clockwise 249−8−08−503 502−0070 50K 3/4” P9 249−J−8−08−503 502−0182 50K 3/4” P9 Specifications 249−J−9−10−503 502−0187 50K 7/8” P10 249−7−10−104 502−0171 100K 7/8” P10 249−8−08−104 502−0071 100K 3/4” P9 249−J−8−08−104 502−0183 100K 3/4” P9 249−J−9−10−104 502−0188 100K 7/8” P10 249−7−10−254 502−0172 250K 7/8” P10 249−8−08−254 502−0072 250K 3/4” P9 249−7−10−504 502−0173 500K 7/8” P10 249−8−08−504 502−0073 500K 3/4” P9 Spectrol No. NOTE: 249−7−XX−XXX are plastic shaft types P10 .300 (7.6) .025 (0.63) L .100 (2.54) .500 (12.7) .250 (6.35) Dia .375 (9.52) .500 (12.7) 3/8−32 NEF−2A .250 (6.34) 1 .200 (5.08) Wiper 1 3 .016 (0.41) .014 (0.36) 2 2 .025 (0.63) .100 (2.54) 3 L = Shaft Length (See Table) Electrical Resistance Range − Linear Taper: 500Ω to 500kΩ − CW Audio Taper: J types Resistance Tolerance: ±10% Power Rating: 1 Watt @ 70°C derated to 0 Watts @ 125°C Temperature Coefficient of Resistance: ±100ppm/°C Linearity Tolerance: ±5% independent Contact Resistance Variation: 3% of total resistance Insulation Resistance: 1000 Meg Ω min, 500VDC Dielectric Strength: 750V RMS min 50Hz End Resistance: 2Ω max each end Effective Electrical Angle: 265° ±5° Rotation Life: 25,000 cycles Mechanical Resistance Element: Cermet Mechanical Rotation: 295° ±5° Starting and Running Torque: 1.5 to 18.75mNm End Stop Torque: 0.35Nm (50oz in) Environmental Operating Temperature: −55°C to +125°C Load Life: 1000 hr. NTE Electronics, Inc. D Voice (973) 748−5089 D FAX (973) 748−6224 D http://www.nteinc.com 25