Ultra-precision thin film MELF resistor

Paul Boughton

Vishay Intertechnology Inc's new series of high-precision thin film MELF resistors are designed for demanding applications with high stability and reliability requirements. The Vishay Beyschlag UMB 0207 series devices are the industry's first MELF resistors to offer low TCR down to ±5 ppm/K and tolerances down to ±0.02 % in the standard 0207 case size.

The UMB 0207 series combines the proven reliability of professional MELF products with the most advanced level of precision and stability ever achieved with axial thin film high-precision resistors. This combination makes the devices perfectly suited for precision circuits in measurement and calibration equipment, industrial process control systems, aerospace electronics, and medical equipment.

The UMB 0207 offers a resistance range from 100Ω to 390kΩ, high operating voltage of 350 V, rated power dissipation to 400mW at 70°C, and excellent long-term stability down to <0.02 per cent after 1,000 hours. Suitable for processing on automatic SMD assembly systems, the devices are completely 'Green' — lead (Pb)-free, halogen-free, and RoHS-compliant without exemptions.

For more informatiomn, visit www.vishay.com