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)
    		•  Spectrol 249 Series
    Potentiometer - 1 Watt, 1/2" square,
    1/8" and 1/4" dia. shaft
    Photo of 249 Series PotentiometerPhoto of 249 Series Potentiometer

    Spectrol No. 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
    249-8-08-503 502-0070 50K 3/4" P9
    249-J-8-08-503 502-0182 50K 3/4" P9
    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
    NOTE: 249-7-XX-XX are plastic shaft types

    		  
    Dimensional Drawing

    P9

    P10

    Schematic Diagram

    Specifications
    Electrical
    Resistance Range - Linear Taper: 500 Ohms to 500K Ohms
    Resistance Range - CW Audio Taper: J types
    Resistance Tolerance: ±10%
    Power Rating: 1W @ +70°C derated to 0W @ +125°C
    Temperature Coefficient of Resistance: ±100ppm/°C
    Linearity Tolerance: ±5% independent
    Contact Resistance variation: 3% of total resistance
    Insulation Resistance: 1000 Meg Ohm min, 500VDC
    Dielectric Strength: 750V RMS min 50Hz
    End Resistance: 2 Ohms 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 (50 oz in)

    Environmental
    Operating Temperature: -55° to +125°C
    Load Life: 1000 hr.

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