tel: 82 - 32 - 817 - 4325 r esistors a nd fax: 82 - 32 - 817 - 4329 r esistive a pplications web: http://www.raraohm.com email: sg@raraohm.com date: 2012 - 12 - 12 copyright? rara electronics corp. p r18 single - turn rotary p otentiometers description the pr 18... single - turn, housed in a metal case, rotary carbon control potentiometers. it comprises a carbon resistive track fitted on a resin modified paper base. base diameter of potentiometers is 18 mm. resis tance track can be linear - a, logarithmic - b, inverse logarithmic - c. potentiometers are made single or tandem, with plastic or metallic spindle. terminals are designed for the pcb or soldering pins. application s potentiometers are widely used in electronic au dio - video equipment, electric domestic equipment and outer control elements. quick r eference d ata parameter value rated resistance r n a ccording e3 - series (1 - 2,2 - 4,7 - 10 etc.) resistance range: a low (linear) ( ohms ) b low (logar ithmic) ( ohms ) c low (inverse logarithmic) ( ohms ) 120 2,2m 1k 1m 1k 1m tolerance of resistance (%) 5 % on r n less or = 470 k ohms on request 10% on r n less or = 470 k ohms on request 20% on r n less or = 220 k ohms on request 30 % on r n more than 220 k ohms on request maximum dissipation p n at t amb = 40 o c: a low (w) b low (w) c low (w) 0.2 0.1 0.1 maximum limit voltage : a low (v) b low (v) c low (v) 200 200 200 total mechanical angle of rotation ( o ) 300 5 synchronous characteristic: (db) (only for tandem potencjometers g) - for linear a at values between 10 and 90 % of r total - for logarithmic b at attenuation range 0 40db 2 4 maximum dissipa tion at category temperature 25% p n switch data: voltage/current 120 v / 1 a ac or 16 v / 2 a dc climatic category 25/070/10 marking marking on metal case: producer "telpod"; rated resistance; month and yea r of production. ordering example : please order by an example: we need potentiometer 18 mm; with switch; single; 47kw; linear a low; diameter of spindle 6 mm, long 25 mm; end type of spindle p - 6; for mounting on printed circuit board: potentiome ter prp 185 s56 47k ohm a 25 p6 packing the potentiometers can be supplied in bulk packing in a plastic bags and in a carton box.
tel: 82 - 32 - 817 - 4325 r esistors a nd fax: 82 - 32 - 817 - 4329 r esistive a pplications web: http://www.raraohm.com email: sg@raraohm.com date: 2012 - 12 - 12 copyright? rara electronics corp. mechanical d ata table 2 type of potentiomete r single tan dem switch tap material of spindle spindle diameter (mm) typical length of spindle end of spindle bush m...x../ length (mm) pins/ assembly pr 185 s ingle n o no m etal 6 16; 20; 25; 40 p1; p3; p5; p6 m 7x0.75/6 dir. assemb. prp 18 5 no pcb prt 185 yes dir. assemb. prpt 185 yes pcb pr 185 s56 yes no dir. assemb. prt 185 s56 yes dir. assemb. pr 186 n o no 4 8; 10; 12.5; 16; 20; 25; 32; 40; p1; p3; p5.1; p5.2 m 7x0.75/6.5 dir. assemb. prp 186 no pcb prt 186 yes dir. assemb. prpt 186 yes pcb pr 1862 no plastic 12; 20; 25 p5 dir. assemb prt 1862 yes dir. assemb pr 186 s56 yes no m etal 8; 10; 2.5;16; 20; 25; 32; p1; p3; dir. assemb prt 186 s56 yes dir. assemb pr 18 g t andem no no 6 16; 20; 25; 32; 40 p5; p6 m7x0.75/6; 16 pcb prp 18 g no dir. assemb prt 183 g yes pcb prpt 183 g yes dir. assemb resistance l aws : fig. 1. resistance laws: a - linear; b - logarithmic, c - reverse logarithmic. fig. 2. derating curve versus ambient temperature. derating curve: potentiometers are derated from 100% rated dissipation at 40 o c to 25% rated dissipation at 70 o c.
tel: 82 - 32 - 817 - 4325 r esistors a nd fax: 82 - 32 - 817 - 4329 r esistive a pplications web: http://www.raraohm.com email: sg@raraohm.com date: 2012 - 12 - 12 copyright? rara electronics corp. spindles i n dicating of spindle ends dimensions (mm) diameter d l/a/h for l 8, 10, 12, 12.5 for l 16 for l 20 for l 25, 32, 40 p1 4, 6 p3 4 p5 6 8/ - / - 10/ - / - 10/ - / - p5.1 4 6/ - / - 6/ - / - 6/ - / - 6/ - / - p5.2 4 12/ - / - 12/ - / - p6 6 8/7/6 12/11/10 14/13/12 outline view of potentiometers
tel: 82 - 32 - 817 - 4325 r esistors a nd fax: 82 - 32 - 817 - 4329 r esistive a pplications web: http://www.raraohm.com email: sg@raraohm.com date: 2012 - 12 - 12 copyright? rara electronics corp. outline view of potentiometers (cont.)
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