Film Capacitors

Image Part Number Description / PDF Quantity Rfq
QXK2G223JTPTZH

QXK2G223JTPTZH

Nichicon

CAP FILM 0.022UF 5% 400VDC RAD

0

QXL2B104KTP7FG

QXL2B104KTP7FG

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CAP FILM 0.1UF 10% 125VAC RADIAL

0

QXT2G473KRP7FM

QXT2G473KRP7FM

Nichicon

CAP FILM 0.047UF 10% 400VDC RAD

0

QXK2J683JTPTZH

QXK2J683JTPTZH

Nichicon

CAP FILM 0.068UF 5% 630VDC RAD

0

QXP2E474JRP7FP

QXP2E474JRP7FP

Nichicon

CAP FILM 0.47UF 5% 250VDC RAD

0

QYS1H154KTP

QYS1H154KTP

Nichicon

CAP FILM 0.15UF 10% 50VDC RADIAL

0

QXP2E104JRP7FL

QXP2E104JRP7FL

Nichicon

CAP FILM 0.1UF 5% 250VDC RAD

0

QYX2A103KTP3TA

QYX2A103KTP3TA

Nichicon

CAP FILM 10000PF 10% 100VDC RAD

3977

QAK2G684JTP

QAK2G684JTP

Nichicon

CAP FILM 0.68UF 5% 400VDC AXIAL

0

QAK2E225JTP

QAK2E225JTP

Nichicon

CAP FILM 2.2UF 5% 250VDC AXIAL

0

QXP2G154JRPT

QXP2G154JRPT

Nichicon

CAP FILM 0.15UF 5% 400VDC RAD

0

QXT2J333KRP7FR

QXT2J333KRP7FR

Nichicon

CAP FILM 0.033UF 10% 630VDC RAD

0

QXP2K334JRPT

QXP2K334JRPT

Nichicon

CAP FILM 0.33UF 5% 800VDC RAD

0

QYX1H472JTP1FD

QYX1H472JTP1FD

Nichicon

CAP FILM 4700PF 5% 50VDC RAD

0

QAK2E474JTP

QAK2E474JTP

Nichicon

CAP FILM 0.47UF 5% 250VDC AXIAL

0

EEC2E106HWNM11

EEC2E106HWNM11

Nichicon

CAP FILM 10UF 250VAC RADIAL

0

QXK2E683JTPTZH

QXK2E683JTPTZH

Nichicon

CAP FILM 0.068UF 5% 250VDC RAD

0

QXK2J334KTP7ZHFT

QXK2J334KTP7ZHFT

Nichicon

CAP FILM 0.33UF 10% 630VDC RAD

0

QXK2E104KTP7ZHFJ

QXK2E104KTP7ZHFJ

Nichicon

CAP FILM 0.1UF 10% 250VDC RAD

0

QXP2E684KRP7FP

QXP2E684KRP7FP

Nichicon

CAP FILM 0.68UF 10% 250VDC RAD

0

Film Capacitors

1. Overview

Film capacitors are a type of electronic component using plastic films (e.g., polypropylene, polyester) as dielectric materials. They are non-polarized capacitors with high insulation resistance, low loss, and excellent long-term stability. These capacitors play critical roles in power electronics, automotive systems, renewable energy, and consumer devices due to their reliability and high voltage-handling capabilities.

2. Main Types and Functional Classification

Type Functional Characteristics Application Examples
Polyester (PET) Low cost, compact size, moderate temperature stability General-purpose circuits, consumer electronics
Polypropylene (PP) High voltage resistance, low dielectric loss, excellent thermal stability Power supplies, motor drives, EV charging systems
Polycarbonate (PC) High precision, low moisture absorption Medical devices, aerospace instrumentation
Polyphenylene Sulfide (PPS) High-temperature endurance, flame retardant Automotive electronics, industrial automation
Polyimide (PI) Ultra-high temperature resistance (up to 200 C), compact design Aviation systems, downhole drilling equipment

3. Structure and Composition

Film capacitors typically consist of metalized plastic films wound or stacked into a cylindrical/rectangular core. The dielectric thickness ranges from 1-10 m, with electrode materials like zinc or aluminum. The assembly is encapsulated in epoxy resin or plastic housings. Key structural elements include:

  • Dielectric layer (plastic film)
  • Metallized electrode patterns
  • Termination electrodes (sprayed metal contacts)
  • Protective outer coating

4. Key Technical Parameters

Parameter Description Importance
Capacitance Range 0.1 nF - 100 F Determines energy storage capacity
Rated Voltage 50 V - 10 kV Defines operational safety limits
Capacitance Tolerance 1% to 20% Affects circuit precision
Dissipation Factor 0.0001 - 0.05 Indicates energy efficiency
Insulation Resistance 10^9 - 10^12 Reflects leakage current performance
Operating Temperature -55 C to +155 C Dictates environmental adaptability
Temperature Coefficient 50 to 400 ppm/ C Impacts stability under thermal stress
Stability C/C < 2% over 10 years Long-term reliability indicator

5. Application Fields

Main industries and equipment:

  • Power electronics: AC/DC converters, frequency inverters
  • Automotive: Electric vehicle (EV) on-board chargers, battery management systems
  • Consumer electronics: LED lighting, plasma TVs
  • Industrial: Uninterruptible power supplies (UPS), welding machines
  • Renewable energy: Solar inverters, wind turbine converters

6. Leading Manufacturers and Products

Manufacturer Representative Product Key Features
TDK Corporation B32656 series PP film, 480 F/1200 V for industrial inverters
KEMET C4AZ-X7R4U3D106KE Automotive-grade DC link capacitor
AVX 6TP105K Tantalum polymer hybrid for aerospace
Vishay MKP1848 series Self-healing PP technology

7. Selection Guidelines

Key considerations:

  1. Determine required capacitance and voltage ratings with safety margins
  2. Assess environmental conditions (temperature, humidity, vibration)
  3. Evaluate dielectric absorption and frequency response requirements
  4. Consider packaging constraints (through-hole vs. surface-mount)
  5. Analyze cost-performance trade-offs for mass production

8. Industry Trends

Emerging trends include: development of high-power-density capacitors for EVs, adoption of nanodielectric materials for improved thermal stability, growth of biodegradable film technologies, and integration of smart monitoring features in industrial capacitors. The market is projected to grow at 7.2% CAGR (2023-2030), driven by renewable energy and 5G infrastructure demands.

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