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| LRA25 Series TOCOS PA N E L C O N T R O L S (R) 25mm Diameter, Single-Turn, Wirewound Industrial Panel Controls LRA25 Features 25mm diameter, single-turn industrial panel controls Wirewound element High linearity, 0.5% max. Single unit, single shaft Linear taper Metal shaft and bushing 5% standard total resistance tolerance Wide operating temperature of 10 C to 100 C Panel mounting style only Right angle ear-lug terminals 6mm diameter shafts in slot, flat or round end styles Standard 20mm shaft length Specifications Electrical Standard Resistance Range . . . . . . . . . . . . . 500 to 20k Resistance Tolerance . . . . . . . . . . . . . . . . . . 5% standard ( 2% or 1% special order ) End Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2% max. Resistance Taper . . . . . . . . . . . . . . . . . . . . . . . . . . B = linear Independent Linearity . . . . . . . . . . . . . . . . . . . 0.5% max. 40 C Power Rating . . . . . . . . . . . . . . . . . . . . . .1.5 watts at Environmental Temperature Range . . . . . . . . . . . . . . . . . Temperature Characteristics . . . . . . . . . . . 10 C to 100 C 85 C, 5 hours without load T/R ) 5% Low Temperature Exposure . . . 10 C, 1 hour without load T/R ) 3% Load Life . . . . . . . . . . . . 40 C, 1,000 hours with rated load T/R ) 3% Insulation Resistance . . . . . . .100M minimum at 500VDC Dielectric Strength . . . . . . . . . . . . . . . . . . 500VAC, 1 minute Theoretical Resolution Resistance ( ) 500 1,000 2,000 Resolution ( % ) 0.27 0.21 0.17 Resistance ( ) 5,000 10,000 20,000 Resolution ( % ) 0.12 0.08 0.09 Moisture and Load Life . . . . . . . . . . . . 40 C, 90-95%RH, 500 hours with 1/10 rated load T/R ) 5% Vibration . . . . . . . . . . . . . . . . . . .10-55Hz, 1.5mm amplitude, 2 directions, 2 hours each T/R ) 1% Soldering Heat Resistance . . . . . . . . . . 350 C, 3.5 seconds T/R ) 2% Rotational Life . . . . . . . . . 15,000 cycles with 1/2 rated load T/R ) 3% T/R = Total Resistance Change Mechanical Mechanical Travel . . . . . . . . . . . . . . . . . . . . . . . . . . 300 5 Shaft Torque . . . . . 70.2 to 306 gf* cm (0.973 to 4.242 oz*in) Stop Strength . . . . . . . . . . . . 10.2 kgf* cm (141.4 oz*in) max. Mounting Nut Torque . . . . . . 15 kgf*cm (207.94 oz*in) max. Solderability . . . . . . . . . . . . . . . . . . . . . . . 235 C, 3 seconds Marking . . . . . . . . . . Taper, resistance, resistance tolerance, terminal identification, date code TOCOSAMERICA, INC. 1177 East Tower Road, Schaumburg, IL 60173 Tel: 847-884-6664 Fax: 847-884-6665 E-mail: sales@tocos.com www.tocos.com 61 LRA25 Series LRA25 Panel Mount, Single Unit, Single Shaft Right Angle Ear-Lug Terminals Dimensions Unit: mm Recommended Panel Mounting Holes Part Numbering System L RA 25 20 S B 103 J NOTE: FMS = From Mounting Surface Resistance Tolerance: J = G= F= 5% (standard). 2% (special order ). 1% (special order ). Resistance Code: Expressed in ohms. A three digit code where the first two digits are significant figures, and the third digit indicates the number of zeros that follow these figures (i.e., 100 = 10; 101 = 100; 102 = 1,000; 103 = 10,000; 105 = 1,000,000 ). See table for standard resistance values. Resistance Taper: B = Linear. Shaft End Style: S = Slotted. F = Flatted. R = Round. Standard Shaft Length: 20 = 20mm FMS. Up to 50mm shaft length available (special order ). Size: 25 = 25mm Diameter. TOCOS Series Name: RA = Wirewound Element. Linearity: L = High Linearity, 0.5% Max. Standard Resistance Values and Part Numbering Codes Standard Nominal Total Resistance Values and Part Numbering Codes Resistance ( ) 500 Code 501 Resistance ( ) 1,000 2,000 5,000 Code 102 202 502 Resistance ( ) 10,000 20,000 Code 103 203 Refer to Shaft End Styles Specifications and Hardware Specifications for details and availability. For additional information, refer to Guidelines and Precautions for Using Panel Controls. 62 1177 East Tower Road, Schaumburg, IL 60173 TOCOSAMERICA, INC. Tel: 847-884-6664 Fax: 847-884-6665 E-mail: sales@tocos.com www.tocos.com |
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