Series 251 9mm Rotary Potentiometer Miniature 9mm Size Long Rotational Life (up to 1 million cycles) Low Rotational Torque Molded Shaft or Rotor Available Sturdy Insert Molded Terminal Low Noise Output Economical Solution Description Series 251 Rotary Potentiometer provides an economical solution in applications with space constraints by providing a compact, reliable, and long-life potentiometer. The variety of standard effective electrical angle options along with shaftless or shaft options provide flexibility to meet design requirements. Ordering Information Effective Terminal Shaft Resistance Resistance Tap Bushing Shaft Series Electrical Style Trim Code Tolerance Option Option Length L Angle 251 B 12 F 103 C 1 N B Code Spec. Code Spec. Code Spec. A 10% PC style N No center tap B 20% B perpendicular T 4 center tap Code Spec. C 30% Flatted F (5.00mm dia.) Code Spec. Flatted T (3.96mm dia.) 1 Linear (40) 0 Slotted rotor 3 Linear (60) 5 Linear (110) 9 Linear (280) Code Spec. Code Spec. 12mm molded Code Spec. 12 103 10 k shaft Bushingless 253 25 k 15mm molded 1 15 (slotted rotor only) 503 50 k shaft Threadless bushing 00 Slotted rotor 104 100 k B (shaft version only) 2021-02-04 Rev. B www.ctsco r p.com Page 1 of 3 2021 CTS Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote. Series 251 9mm Rotary Potentiometer Electrical Specifications Parameter Conditions & Remarks Min Max Unit Resistance Range Linear 10k 200k Standard -30 +30 % Resistance Tolerance Special -20 +20 % Special -10 +10 % 50C 0.01 watt Power Rating Dielectric Strength 1 minute 250 VAC Insulation Resistance 250 VDC 100 M 50 VAC Maximum Operating Voltage 5 VDC Effective Electrical Angle See ordering information 40 280 Mechanical and Environmental Parameter Conditions & Remarks Min Max Unit Operating Temperature Range -10 +70 C Rotational Torque 3 30 gf-cm Mechanical Angle 300 280 EEA 250,000 cycles Rotational Life 40, 60 & 110 EEA 1,000,000 cycles Stop Strength: 3 kgf-cm minimum Pull-Push Strength of Shaft: 5 kgs for 10 seconds Soldering Condition: Maximum temperature of 260 for 5 seconds Bushing mount on panel Mounting Information: Snap-in mount on PCB Packaging: Standard cardboard box packaging All testing is performed at room ambient conditions except as noted. Users should verify device actual performance in their specific applications. This product is compliant to RoHS3 Directive 2011/65/EU& 2015/863 Amendments of Annex II on 31 March 2015, and REACH SVHC Directive EC 1907/2006 Amendments of Annex XIV & Annex XVII on 15 January 2018. Custom and value-added options available on request. Please contact your sales representative for additional information. Mechanical Specifications Series 251 Bushing Mount, T Shaft Trim 2021-02-04 Rev. B www.ctsco r p.com Page 2 of 3 2021 CTS Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.