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| T18 Vishay Sfernice 3/4" Rectangular Multiturn Cermet Trimmer FEATURES * * * * Industrial Grade 0.75 Watt at 70C MIL-R-22097 CECC 41 100 Fine pitch screw for outstanding setting ability High performance plastic case Large size saddle to Metal collector improves prevent back-lash power dissipation Multi-fingered wiper for low contact resistance Thermoplast bottom protects Connections solded track form mechanical to track stresses due to sealing resin DIMENSIONS in millimeters T18 SHAFT 1 0.2 2 3 4.7 0.2 0.8 6.4 0.2 Base level 4.8 0.2 O 2.5 19 0.5 2.54 0.2* 0.6 1.5 0.5* 0.6 4.5 0.5 3.15 0.5* 5.1 0.2* 7.6 0.2* * To be measured at base level CIRCUIT DIAGRAM a (1) b (2) cw c (3) Document Number: 51027 Revision 15-Apr-02 For technical questions, contact sfer@vishay.com www.vishay.com 67 T18 Vishay Sfernice 3/4" Rectangular Multiturn Cermet Trimmer ELECTRICAL SPECIFICATIONS Resistive Element Electrical Travel Resistance Range Standard Series E3 Tolerance Power Rating Temperature Coefficient Limiting Element Voltage (Linear Law) Contact Resistance Variation End Resistance (Typical) Dielectric Strength (RMS) Insulation Resistance (500 VDC) Standard On Request Linear Logarithmic cermet 15 turns 1 10 to 2.2 M 1 - 2.2 - 4.7 and 1 - 2 - 5.. 10% 5% 0.75 W at + 70C not applicable See Standard Resistance Element Table 250 V 2% Rn or 1 1 1000 V 106M MECHANICAL SPECIFICATIONS Mechanical Travel Operating Torque (max. Ncm) End Stop Torque Unit Weight (max. g) 18 turns 5 2 1 POWER RATING CHART 0.75 RATED POWER IN WATT clutch action 0.50 ENVIRONMENTAL SPECIFICATIONS Temperature Range Climatic Category Sealing T18 : - 55C + 125C 55/100/56 T18 : fully sealed container IP67 0.25 0 0 20 40 60 70 80 100 125 140 TEMPERATURE IN DEGREES CELSIUS PERFORMANCE TESTS Load Life CONDITIONS 1000 hours at rated power 90'/30' - ambient temperature 70C Phase A dry heat 125C Phase B damp heat Phase C cold -55C Phase D damp heat 5 cycles 56 days 5 cycles - 55C at + 125C 50 g 11 ms 3 successive shocks in 3 directions 10 - 55 Hz 0.75 mm or 10 g during 6 hours 200 cycles TYPICAL VALUES AND DRIFTS RT R1-2 (%) (%) RT R1-2 1% 2% Contact resistance variation : < 1% Rn 0.5% 0.5% Dielectric strength : 1000 V RMS Insulation resistance : > 104 M Climatic Sequence 1% 1% Long Term Damp Heat Rapid Temperature Change Shock 0.5 % V1-2 1% V1-3 0.3% 0.2% Vibration 0.2% 1% Contact resistance variation : < 2% Rn V1-2 0.3% V1-3 Rotational Life www.vishay.com 68 For technical questions, contact sfer@vishay.com Document Number: 51027 Revision 15-Apr-02 T18 3/4" Rectangular Multiturn Cermet Trimmer STANDARD RESISTANCE ELEMENT DATA LINEAR LAW STANDARD MAX. MAX. CUR. MAX. RESISTANCE POWER WORKING THROUGH VALUES AT + 70C VOLTAGE ELEMENT W V mA 0.75 10 2.7 270 22 4.06 184 47 5.93 126 100 8.7 87 220 12.8 58 470 18.7 40 1k 27.4 27 2.2k 40.6 18 4.7k 59.3 11 10k 86.6 9 22k 128.4 5.8 0.75 47k 187 4 0.625 100k 250 2.5 0.28 220k 250 1.09 0.13 470k 250 0.44 0.06 1M 250 0.25 2.2M 250 T.C. - 55C + 125C ppm/C 0 + 200 Vishay Sfernice MARKING Printed : - VISHAY trademark - series - style - ohmic value (in , k, M) - manufacturing date - marking of terminal 3. 100 PACKAGING - In plastic box of 100 pieces, no code - In tube by 25 pieces code "TU25". ORDERING INFORMATION OPAQUE T18 10K 10 % TU25 SERIES OHMIC VALUE TOLERANCE PACKAGING TU25: Tube N.B.: On delivery the wiper is positioned at mid-travel. Document Number: 51027 Revision 15-Apr-02 For technical questions, contact sfer@vishay.com www.vishay.com 69 |
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