Passive components
Capacitors
Capacitors for decoupling, filtering, timing and energy storage, across ceramic, electrolytic, tantalum and film technologies.
Capacitors appear on almost every bill of materials — decoupling IC supply pins, filtering power rails, setting timing and storing energy. Enquiries cover the capacitor technologies used in electronic assemblies, from small MLCCs to large electrolytic and film parts.
Two capacitors are interchangeable only when value, voltage rating, dielectric or technology, tolerance and size all agree. The details below help an enquiry reach the right part first time.
Capacitor types
- Multilayer ceramic capacitors (MLCCs)
- Aluminium electrolytic capacitors
- Tantalum capacitors
- Film capacitors
- Box capacitors
- Safety capacitors
- Supercapacitors
Representative examples
- 100nF MLCC
- 10uF ceramic capacitor
- 100uF aluminium electrolytic
Representative examples show common component types for reference. They are not a statement of current availability.
What to include in an enquiry
The more of these details an enquiry has, the quicker a requirement can be reviewed. A full manufacturer part number or a BOM line covers most of them.
- Capacitance
- Voltage rating
- Tolerance
- Dielectric or capacitor type
- Package or dimensions
- Capacitance and tolerance
- The value in pF, nF or uF with its tolerance, for example 100nF ±10%. Codes such as 104 (100nF) from a BOM or the part are fine.
- Rated voltage
- The DC working voltage. A replacement needs at least the voltage rating of the original part.
- Dielectric or technology
- For MLCCs, the dielectric — C0G (NP0) for stable, low-loss values; X7R or X5R for general decoupling. Otherwise state aluminium electrolytic, tantalum or film.
- Package or size
- SMD case size such as 0402, 0603 or 0805; for radial and snap-in parts, diameter × height and lead spacing.
- Temperature rating and life
- Aluminium electrolytics are rated for a maximum temperature, commonly 85 °C or 105 °C, and an endurance in hours. Mention low-ESR or high-ripple types.
- Safety class
- Capacitors across or to the mains need an X or Y safety class matching the original.
Capacitance alone does not identify a part: voltage rating, dielectric or type, tolerance and size are needed as well.
Related component categories
All component categories- ResistorsFixed resistors for signal, sensing and power applications, in surface-mount chip and through-hole forms.
- Inductors & coilsInductive components for power conversion, filtering and EMI suppression on power and signal lines.
- Protection componentsComponents that protect circuits against overcurrent, overvoltage, transients and electrostatic discharge.
Have a requirement for capacitors?
Share the part numbers, ratings or BOM lines you need reviewed — by the enquiry form, email or WhatsApp.