ECHU Series PPS Film Chip Capacitors Panasonic ECHU Series Capacitors are plastic film capacitors with stacked metallized PPS film as a dielectric. With a simple mold-less construction, the ECHU Series is small (min. 1.6mm x 0.8mm) and withstands 85°C, 85%RH, W.V. x 1.0 for 500 hours. The RoHS compliant Panasonic ECHU Series Capacitors are recommended for time-constant, filtering, oscillation, and resonance.