MLCC effective capacitance
Combine entered DC-bias retention with dielectric temperature range and manufacturing tolerance.
Development preview. Check the assumptions below before relying on a result. Calculations run in your browser.
How it calculates
Model: Ceff=Cnom × bias retention; bounds multiply manufacturing and temperature factors
Assumptions
- Bias retention must be read from the actual manufacturer curve at operating bias, package and capacitance.
- X5R/X7R ±15% is a bounded temperature characteristic, not a linear TCR. C0G uses ±30 ppm/°C. Independent multiplicative bounds are a screening estimate; ageing and bias/temperature interaction need actual device data.
Worked example
These are the calculator's default inputs. Change any input above to recalculate.
Inputs
- Nominal capacitance
- 0.00001 F
- DC-bias retained capacitance
- 50 %
- Temperature class
- X7R
- Operating temperature
- 25 °C
- Reference temperature
- 25 °C
- Manufacturing tolerance
- 10 %
Results
- Nominal at DC bias
- 0.000005 F
- Conservative lower bound
- 0.000003825 F
- Conservative upper bound
- 0.000006325 F
- Temperature variation bound
- 15 %