Capacitance Change of Capacitor
 1. Class 1 Capacitors
    Capacitance might change a little depending on the
    surrounding temperature or an applied voltage.
    Please contact us if you intend to use this product 
    in a strict time constant circuit.
 2. Class 2 and 3 Capacitors
    Class 2 and 3 capacitors with temperature 
    characteristics B, E and F have an aging 
    characteristic, whereby the capacitor continually
    decreases its capacitance slightly if the 
    capacitor is left on for a long time. Moreover, 
    capacitance might change greatly depending on the 
    surrounding temperature or an applied voltage. 
    So, it is not likely to be suitable for use in a 
    time constant circuit. Please contact us if you 
    need detailed information.