® Electrocomponents Series 251 Data Sheet Rotary Potentiometer Long Life 9mm Carbon Composition Rotary Potentiometer Features • 1M Cycle Life Available • Miniature 9mm Size • Light Rotational Torque • Molded Shaft or Rotor Available • Sturdy Insert Molded Terminal • Low Noise • Low Cost • RoHS compliant Electrical and Mechanical Specifications Resistance Range 10 K through 200 K ohms, linear Stop Strength 3 kgf-cm minimum Resistance Tolerance ± 10%, ± 20%, ± 30% Push-Pull Strength on Shaft 5 kg for 10 seconds Power Rating 0.01 watts @ 50°C Rotational Life 250,000 cycles ( 240° to 280° effective electrical angle) 1,000,000 cycles (40° to 110° effective electrical angle) Dielectric Stength 250 VAC for 1 minute Operating Temperature - 10°C to 70°C Maximum Operating Voltage 50 VAC, 5 VDC Insulation Resistance 100 Megohm minimum @ 250 VDC Angle of Rotation Total Rotational Angle: 300° Effective Electrical Angle: 40°, 60°, 110°, 280° Solder Heat Resistance 260°C for 5 seconds Mounting Information Bushing Mount Snap-in Mount Rotational Torque 3 to 30 gf-cm 1-2 CTS Electrocomponents © 2010 CTS Corporation. All rights reserved. Information subject to change. 05/19/10 www.ctscorp.com "T" Shaft Trim, Bushing Mount 5.1 .201 L± 0.5 .020 10.0 .394 5.0 .197 3.45 ±0.10 .136 ±.004 4.9 .193 4.4 .173 +0.0 0.8 -0.1 .031 +.000 -.004 2.5 .0985 REF. 3.6 .142 0.5 C .020 0.8 .031 2.0 .079 3.7 .146 5.0±0.05 .197±.002 Ø7.0 .276 5.8 .228 6.2 .244 2.5±0.05 .0985±.002 +0.05 3.96 -0.10 .156 +.002 -.004 Ø 0.5 .020 Ø 1.1 +0.2 -0.0 (3) +.008 .043 -.000 MOUNTING SURFACE 0.3 .012 TERMINAL HOLE DETAIL 3.7 .146 (3) 5.0 .197 DIMENSION: mm INCH "F" Shaft Trim, Bushing Mount 4.9 .193 Ø 5.0 .197 3.50 ±0.10 .138 ±.004 C 0.8 .031 2.0 .079 +0.0 0.8 -0.1 +.000 .031 -.004 3.7 .146 REF. 5.0±0.05 .197±.002 Ø7.0 .276 4.4 .173 2.5±0.05 .0985±.002 +0.05 5.00 -0.10 .197 -.002 -.004 7.0 .276 5.8 .228 6.2 .244 5.1 .201 L± 0.5 .020 10.0 .394 3.6 .142 0.5 .020 0.5 .020 Ø (3) MOUNTING SURFACE 0.3 .012 TERMINAL HOLE DETAIL 3.7 .146 (3) +0.2 1.1 -0.0 .043 +.008 -.000 2.5 .0985 5.0 .197 DIMENSION: mm INCH Slotted Rotor, Snap-in Mount 8.20 .322 3.20 .126 C L C L 4.05 .159 3.0 .118 0.5 (2) .020 8.5 .335 Ø 1.8 (2) .071 37°(2) 0.5 (2) .020 10.6 .417 +.000 .031 -.004 2.5 (2) .098 Ø 1.30±0.1 (3) .051±.004 7.2 .283 1.8 .071 1.0 .039 C L +0.0 0.8 -0.1 (3) 0.3 .012 7.40 .291 9.60 .378 HOLE PLACEMENT DETAIL VIEW 5.0 .197 FROM POT. MOUNTING SIDE. 0.3 .012 2.4 .09 4 1.56 .061 4.0 .157 8.20 .323 11.1 .437 10.3 .406 3.7 .146 7.40 .291 C L 4.9 .193 3.1 .122 3.20 .126 1.0 .039 1.2(3) Ø .047 1.2 .047 9.5 .374 DIMENSION: mm INCH Ordering Information 251 B TERMINAL STYLE B- PC terminal 12 F MOLDED SHAFT LENGTH 12 - 12 mm 15 - 15 mm MOLDED SLOTTED ROTOR 00 - Slotted rotor 2-2 CTS Electrocomponents B 1 SHAFT TRIM RESIST TOL F - 5.00 mm dia., Flatted A- ± 10% B- ± 20% C- ± 30% T - 3.96 mm dia., Flatted 0 - Slotted rotor SHAFT LENGTH “L” 103 RESISTANCE CODE EXAMPLES CODE 103 253 503 104 RESISTANCE 10 K 25 K 50 K 100 K N B RESIST TAP N - No center tap T - 4° tap at center EFFECTIVE ELECTRICAL ANGLE 1359- Linear (40°) Linear (60°) Linear (110°) Linear (280°) © 2010 CTS Corporation. All rights reserved. Information subject to change. SPECIALS 1 - Without bushing B - Bushing (No thread) Notes: Without bushing for slotted rotor. Bushing (No thread) for shaft. 05/19/10 www.ctscorp.com