TM3 Molded Case for Medical Instruments Vishay Sprague TM3 devices are optimized for input capacitor filters on DC / DC converters, hot plugging surges on battery chargers, low-drop-out devices, and capacitor charge pumps. Applications include glucose meters, infusion pumps, nebulizers, and thermometers. Vishay Sprague TM3 devices provide improved performance and reliability in a wide variety of non-life-support medical monitoring and diagnostic instruments for in-home and hospital use. Featuring a robust anode design, the TM3 series is 100% surge current tested (B, C, D, and E case sizes) and available with Weibull grading and Hi-Rel screening options.