TYPE | TYPICAL DIELECTRIC ABSORPTION |
ADVANTAGES | DISADVANTAGES |
NPO ceramic | <0.1% | Small case size Inexpensive Good stability Wide range of values Many vendors Low inductance |
DA generally low, but may not be specified Limited to small values (10 nF) |
Polystyrene | 0.001% to 0.02% |
Inexpensive Low DA available Wide range of values Good stability |
Damaged by temperature > +85°C Large case size High inductance |
Polypropylene | 0.001% to 0.02% |
Inexpensive Low DA available Wide range of values |
Damaged by temperature > +105°C Large case size High inductance |
Teflon | 0.003% to 0.02% |
Low DA available Good stability Operational above +125°C Wide range of values |
Relatively expensive Large size High inductance |
MOS | 0.01% | Good DA Small Operational above +125°C Low inductance |
Limited availability Available only in small capacitance values |
Polycarbonate | 0.1% | Good stability Low cost Wide temperature range |
Large size DA limits to 8-bit applications High inductance |
Polyester | 0.3% to 0.5% |
Moderate stability Low cost Wide temperature range Low inductance (stacked film) |
Large size DA limits to 8-bit applications High inductance |
Monolithic ceramic (High K) |
>0.2% | Low inductance Wide range of values |
Poor stability Poor DA High voltage coefficient |
Mica | >0.003% | Low loss at HF Low inductance Very stable Available in 1% values or better |
Quite large Low values (<10 nF) Expensive |
Aluminum electrolytic | High | Large values High currents High voltages Small size |
High leakage Usually polarized Poor stability Poor accuracy Inductive |
Tantalum electrolytic | High | Small size Large values Medium inductance |
Quite high leakage Usually polarized Expensive Poor stability Poor accuracy |