Y50805K00000K0L

1248 Vishay Foil Resistors Bulk Metal® Foil Technology Precision Trimming Potentiometers, 1/4 Inch Rectilinear, RJ26 Style - Industrial Trimmer FEATURES • Temperature Coefficient of Resistance (TCR): ± 20 ppm/°C Max2) (- 55 °C to + 150 °C Ref. at + 25 °C); Through the wiper3); ± 50 ppm/°C • Load Life Stability: 1.0 % Maximum ΔR under Full Rated Power for 2000 hours at + 85 °C • Settability: 0.1 % • Setting Stability: 0.1 % Typical1); 0.5 % Maximum1), ΔSS • Power Rating4): 0.25 watts at + 85 °C Product may not be to scale • Resistance Range: 20 Ω to 5 kΩ • Resistance Tolerance: ± 10 % TABLE 1 - MODEL SELECTION† MODEL TERMINATION STYLE AVERAGE WEIGHT (g) STANDARD RESISTANCE VALUES (in Ω) 0.4 20, 50, 100, 200, 500, 1K 2K, 5K W-Edge Mount, Top Adjust 1248 X-Edge Mount, Side Adjust P-Horizontal Mount, Side Adjust STANDARD POWER RATING TOLERANCES at + 85 °C AMBIENT ± 10 % NO. OF TURNS 0.25 W 21 ± 2 NOTES: ADDITIONAL SPECIFICATIONS: † See Figure 1, next page. • Contact Resistance Variation - CRV (noise): 10 Ω Maximum5) 1. Maximum is 1.0 % A.Q.L. standard for all specifications except TCR. (For TCR information see notes 2 and 3). “Typical” is a designers reference which represents that 85 % of the lots supplied, over a long period of time, will be at least the figure stated or better. 2. Maximum TCR applies to the 3 s (sigma) limit or 99.73 % of a production lot. (Measured end-to-end with wiper off the element.) 3. Measurements of TCR through the wiper are influenced more by setting stability and the percentage of the total resistance in use (atthe wiper) than by fundamental resistance change due to temperature alone. The parameter shown is a 2 s distribution typifying the behavior of the device when used with 40 % or more of the total resistance in use. 4. Derated linearly from full power at + 85 °C to zero (0) watts at + 150 °C. See Figure 2, next page. 5. Independent of resistance value 3 W maximum available on special request. Special Available Options: Special marking Burn-in and screening operations • Hop-off: 0.25 % Typical; 1.0 % Maximum • Operating Temperature Range: - 55 °C to + 150 °C • Adjustment Turns: 21 ± 2 • Mechanical Stops: Wiper Idles - No Discontinuity TABLE 2 - ORDERING INFORMATION - 1248 SERIES PARTS Please specify Vishay Model 1248 Precision Trimming Potentiometers as follows: MODEL NO. TERMINATION STYLE RESISTANCE VALUE TOLERANCE W 100R 10 % 1248 NOTES: See Table 1 for details. See Figure 1, next page for Standard Marking. www.foilresistors.com 1 For any questions, contact: foil@vishaypg.com Document Number: 63058 Revision: 24-Mar-10 1248 Vishay Foil Resistors FIGURE 1 - SCHEMATIC AND DIMENSIONS in inches (millimeters) 1248X 0.040" (1.02 mm) C 1248W 0.050" (1.27 mm) C 0.040" (1.02 mm) C 0.250" (6.352 mm) D VISHAY VISHAY 2 0.250" (6.352 mm) D 1 3 CW CW 3 1 1 3 2 2 2 3 1 0.250" (6.35 mm) D 0.250" (6.35 mm) D 0.050" (1.27 mm) C 0.050" (1.27 mm) C 0.010" (0.25 mm) A 0.050" (1.27 mm) C 0.100" (2.54 mm) A 0.175" (4.45 mm) C 0.100" (2.54 mm) A 0.175" (4.45 mm) C 0.050" (1.27 mm) C 0.050" (1.27 mm) C 0.100" (2.54 mm) A 0.100" (2.54 mm) A 0.125" (3.18 mm) C 0.125" (3.18 mm) C (bottom view) (bottom view) 1248P STANDARD MARKING Model No. 0.050" (1.27 mm) C VISHAY Date Code 0.175" (4.45 mm) C 1 1 2 Resistance Value CW Tolerance 3 3 TOLERANCES 0.250" (6.35 mm) D 0.055" (1.40 mm) C A = ± 0.005 Inches (0.13 mm) 0.035" (0.89 mm) C 0.016" (0.41 mm) A C = ± 0.010 Inches (0.25 mm) Resistance Value Tolerance 0.100" (2.54 mm) A 0.125" (3.18 mm) C D = ± 0.020 inches (0.51 mm) 0.250" (6.36 mm) D NOTE: † Standard markings on this surface. Model No. Date Code 0.100" (2.54 mm) A 0.125" (3.18 mm) C NOTE: 1. Adjustment screw 0.080 Inches (2.03 mm) diameter with 0.025 Inches (0.64 mm) x 0.030 Inches (0.76 mm) slot. Tolerances on screw dimensions is ± 0.005 Inches (0.13 mm). Model 1248 has gold plated terminal pins 0.016 Inches (0.41 mm) ± 0.001 Inches (0.03 mm) diameter, 0.200 Inches (5.08 mm) length minimum. Percent of Rated Power 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 Document Number: 63058 Revision: 24-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 2 Legal Disclaimer Notice Vishay Precision Group, Inc. Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. 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