Accutrim 1260 (RJ24 Style) Vishay Foil Resistors Bulk Metal Foil Ultra High Technology Precision Trimming Potentiometers, 3 / Square, RJ24 Style, Designed to Meet or Exceed the Requirements of 8 MIL-PRF-39035, Char. H with a Smooth and Unidirectional Output FEATURES Temperature coefficient of resistance (TCR): 10 ppm/C (- 55 C to + 150 C ref. at + 25 C) (2) through the wiper 25 ppm/C (see table 2 for low values) A smooth and unidirectional resistance with leadscrew adjustment Load life stability: 0.1 % typical R, 1.0 % maximum R under full rated power at + 85 C for 10 000 h INTRODUCTION Settability: 0.05 % typical 0.1 % maximum Vishay Foil Resistors (VFR) precision trimmers have the Setting stability: 0.1 % typical 0.5 % maximum Bulk Metal Foil resistive element which possesses a unique Power rating: 0.25 W at + 85 C inherent temperature and load life stability. Plus, their Resistance range: 5 to 10 k advanced virtually back lash-free adjustment mechanism Resistance tolerance: 5 %, 10 % makes them easy to set quickly and accurately and keeps O-ring prevents ingress of fluids during any board the setting exactly on target. cleaning operation Electrostatic discharge (ESD) up to 25 000 V Terminal finish: tin/lead or lead free BULK METAL WIREWOUND CERMET FOIL Wiper Travel Wiper Travel Wiper Travel TABLE 1 - MODEL SELECTION MODEL TERMINATION STYLE AVERAGE WEIGHT (g) POWER RATING at + 85 C AMBIENT NO. OF TURNS W-edge mount, top adjust 1260 0.4 0.25 W 21 2 X-edge mount, side adjust Note See figure 1 TABLE 2 - 1260 (RJ24 STYLE) SERIES TABLE 3 - VALUES VS. TOLERANCES ELECTRICAL SPECIFICATIONS STANDARD RESISTANCE VALUES STANDARD (in ) TOLERANCE Temperature Coefficient of 10 ppm/C maximum Resistance (TCR) 50 to 10 k (- 55 C to + 150 C, (1) End-to-end + 25 C ref.) 5, 10 10 % Temperature Coefficient of Resistance (TCR) 5 , 10 and 20 20 ppm/C (2) Through the wiper 25 ppm/C 20, 50, 100, 200, 500, 1K, 2K, 5K, 10K 5 % Stability 0.1 % typical R Load life at 10 000 h 1.0 % maximum R (under full rated power of 0.25 W at + 85 C) TABLE 4 - MECHANICAL SPECIFICATIONS (3) Power Rating 0.25 W at + 85 C Adjustment Turns 21 2 Settability 0.05 % typical 0.1 % maximum Mechanical Stops Wiper idles - no discontinuity Setting Stability 0.1 % typical 0.5 % maximum Internal Terminations All welded - no flux Contact Resistance 3 typical Variation - CRV (noise) 10 maximum Hop-off 0.25 % typical Case Material Diallyl-phthalate: black (DAP) 1.0 % maximum High-Frequency Operation Shaft Torque 3 oz. in. maximum Rise/decay time 1 ns without ringing Inductance 0.08 H typical Capacitance 0.5 pF typical Backlash 0.005 % typical Operating Temperature Range - 55 C to + 150 C Document Number: 63054 For any questions, contact: foil vishaypg.com www.vishayfoilresistors.com Revision: 8-Nov-12 1 Resistance Resistance ResistanceAccutrim 1260 (RJ24 Style) Vishay Foil Resistors FIGURE 1 - SCHEMATIC AND DIMENSIONS in Inches (Millimeters) 1260W 0.081 0.010 (2.06 0.25 mm) 0.080 (2.03 mm) maximum VFR 0.420 (10.67 mm) maximum 2 0.015 (0.38 mm) CW minimum 0.300 (7.62 mm) minimum 3 1 3 pins 0.024 0.006 (0.61 0.15 mm) diameter STANDARD MARKING: 0.090 0.005 Model No. (2.29 0.13 mm) diameter Date Code 0.170 0.025 0.010 ( 0.25 mm)C Resistance Value (4.32 0.64 mm) Tolerance 0.075 0.010 0.100 0.005 (1.91 0.25 mm) (2.54 0.13 mm) Termination Finish - in case of 0.375 0.015 0.187 0.020 Lead Free (L.F) (9.53 0.38 mm) (4.75 0.51 mm) NOTES: 0.080 (2.03 mm) maximum 1260X Adjustment screw 0.090 (2.29 mm) diameter with 0.020 (0.51 mm) x 0.081 0.010 0.031 (0.79 mm) slot. Model 1260 (2.06 0.25 mm) VFR has solder plated copper terminal 0.420 (10.67 mm) 2 pins. 0.024 (0.61 mm) diameter, maximum 0.300 (7.62 mm) length minimum. CW 0.015 (0.38 mm) 0.300 (7.62 mm) minimum 1 3 minimum 3 PINS 0.024 0.006 (0.61 0.15 mm) diameter 0.075 0.010 0.170 0.025 0.010 ( 0.25 mm) C (1.91 0.25 mm) (4.32 0.64 mm) 0.090 0.005 0.100 0.005 (2.29 0.13 mm) DIA (2.54 0.13 mm) 0.375 0.015 (9.53 0.38 mm) 0.187 0.020 (4.75 0.51 mm) FIGURE 2 - POWER DERATING CURVE + 85 C + 100 + 75 + 50 + 25 0 - 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 Ambient Temperature C www.vishayfoilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63054 2 Revision: 8-Nov-12 Percent of Rated Power