INTRODUCTION
Vishay Foil precision trimmers have the Bulk Metal® Foil resistive element which possesses a unique inherent temperature and load life stability. Plus, their advanced virtually back lash-free adjustment mechanism makes them easy to set quickly and accurately and keeps the setting exactly on target.

FEATURES
• Temperature coefficient of resistance (TCR): (- 55 °C to + 125 °C ref. at + 25 °C)
   - ± 15 ppm/°C (model 1280G);
   - ± 5 ppm/°C (model 1285G)3);
   - through the wiper ± 50 ppm/°C
• A smooth and unidirectional resistance with leadscrew adjustment
• Load life stability: 0.5 % maximum ΔR under full rated power at + 25 °C for 2000 h
• Electrostatic discharge (ESD) up to 25 000 V
• Settability: 0.05 % typical; 0.1 % maximum
• Setting stability: 0.1 % typical; 0.5 % maximum, ΔSS
• Power rating: 0.75 W at + 25 °C
• Resistance range: 10 Ω to 20 kΩ
• Resistance tolerance: ± 10 %, ± 5 %
• Backlash: < 0.05 %
• Tap test: 0.05 % typical; 0.1 % maximum
• “O”-ring prevents ingress of fluids during any board cleaning operation
• Terminal finish: gold plated (tin/lead finish available on request)