capacitor
Let an agent explain capacitors and their types, relay principles, ratings and applications from electronics references, describe safety and selection, and distinguish capacitors from batteries, inductors and the LEDs misfiled under this entry.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain capacitors and their types, relay principles, ratings and applications from electronics references, describe safety and selection, and distinguish capacitors from batteries, inductors and the LEDs misfiled under this entry.
A passive two-terminal electronic component that stores energy in an electric field between two conductors separated by a dielectric, characterised by capacitance in farads, in types such as ceramic, film, electrolytic, tantalum and supercapacitors, used for filtering, energy storage, timing, coupling and power factor correction; capacitors are ubiquitous in electronics and power systems, and the registry entry also carries aliases for light-emitting diodes and related devices that are a different component.
What it is for: Storing charge and shaping signals in circuits.
It can be explain principles and types; relay ratings and applications; describe safety and selection; distinguish from other components.
Distinguishing features
Electric field storage
Frequency-dependent impedance
Many dielectric types
Ubiquitous use
What it looks like
A small cylinder, disc or chip with two leads.
Physical character
capacitance formula: C = epsilon A / d formula - parallel plate
energy stored: E = (1/2) C V^2 formula
supercapacitor capacitance: up to thousands of farads
How it is recognised
Two-terminal charge-storing component
Ceramic, film, electrolytic, tantalum, supercapacitors
Batteries store chemical energy; inductors store magnetic energy; LEDs emit light and are a different component
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is a kind of - in registry terms
is contrasted with - misfiled as an alias
In practice
Families and kinds
ceramic capacitors
film capacitors
aluminium and tantalum electrolytic capacitors
supercapacitors and ultracapacitors
variable and trimmer capacitors
power capacitors for grids
light-emitting capacitors as a novelty device distinct from LEDs
Identifiers
IEC 60384 fixed capacitors for electronic equipment
HS 8532 electrical capacitors
Standards and regulation
IEC 60384 and related component standards
Safety standards for mains-rated X and Y capacitors
RoHS and REACH material rules
Failure modes and hazards
Electrolytic capacitor failure and leakage
Stored charge shock hazards in high-voltage capacitors
Confusing capacitors with batteries or LEDs
Registry aliases naming LEDs
Also called
+23
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.capacitor
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a capacitor is.
Science.
Principle
Principle.
Principle
Principle.
- How does a capacitor store energy in an electric field, and what determines capacitance? definition
- Is the question about a capacitor, a battery, an inductor or an LED? boundary
Types
Types.
Types
Types.
- How do ceramic, film, electrolytic, tantalum and supercapacitors differ? definition
- Which entry fits the specific type? action
Use Applications and selection.
Practice.
Applications
Applications.
Applications
Applications.
- How are capacitors used in filtering, decoupling, timing, energy storage and power factor correction? provenance
- Which references are standard? provenance
Selection
Selection.
Selection
Selection.
- How are capacitors selected by capacitance, voltage rating, ESR, tolerance and temperature? action
- Which entry fits the specific parameter? action
Safety Safety and reliability.
Regulation.
Safety
Safety.
Safety
Safety.
- What hazards do charged and failing capacitors pose, and what standards apply? provenance
- Which sources are cited? provenance
Reliability
Reliability.
Reliability
Reliability.
- Why do electrolytic capacitors fail, and how is reliability assessed? provenance
- Which entry fits capacitor plague? action
Context History and future.
Context.
History
History.
History
History.
- How did capacitors develop from the Leyden jar to modern components? provenance
- Which entry fits the history of the capacitor? action
Future
Supercapacitors and research.
Future
Future.
- How are supercapacitors and new dielectrics advancing energy storage? provenance
- Which entry fits supercapacitor? action
What the second pass must settle
- Should supercapacitor and electrolytic capacitor be separate primary entries?
- How should electronics standards be linked?
- The registry entry has merged aliases naming light-emitting diodes; should they be removed?