1242

1242 Vishay Foil Resistors Bulk Metal® Foil Technology Precision Trimming Potentiometers, QPL Approved 1/4 Inch Square, Qualified to MIL-PRF-22097, Char. F, RJ26 FEATURES Temperature coefficient of resistance (TCR): ± 10 ppm/°C maximum4) (- 55 °C to + 150 °C ref. at + 25 °C); through the wiper5); ± 25 ppm/°C Load life stability: 0.1 % typical ΔR, 1.0 % maximum ΔR under full rated power of 0.25 W at 85 °C for 1000 h Settability: 0.05 % typical; 0.1 % maximum Setting stability: 0.1 % typical; 0.5 % maximum, ΔSS Power rating: 0.25 W at + 85 °C Resistance range: 50 Ω to 5 kΩ Resistance tolerance: ± 10 % Terminal finish: gold plated www.DataSheet4U.com TABLE 1 - MODEL SELECTION* MODEL 1242 (RJ26) TERMINATION STYLE W-edge mount, top adjust X-edge mount, side adjust AVERAGE WEIGHT (g) 0.4 STANDARD RESISTANCE VALUES (in Ω)1) 50, 100, 200, 500, 1K, 2K, 5K STANDARD TOLERANCE2) ± 10 % POWER RATING at + 85 °C AMBIENT 0.25 W NO. OF TURNS 21 ± 2 Note * See figure 1 TABLE 2 - 1242 (RJ26) SERIES ELECTRICAL SPECIFICATIONS3) Temperature Coefficient of Resistance (TCR) End-to-end4) Through the wiper5) Stability Load life at 1000 h Power Rating (at + 85 °C)6) Settability Setting Stability Contact Resistance Variation - CRV (noise) Hop-off High-Frequency Operation Rise time Inductance Capacitance Operating Temperature Range Note See page 3 for footnotes ± 10 ppm/°C maximum (- 55 °C to + 150 °C, 25 °C ref.) ± 25 ppm/°C 0.1 % typical ΔR 1.0 % maximum ΔR (under full rated powe...