Film Capacitors

Image Part Number Description / PDF Quantity Rfq
B32524Q1476K000

B32524Q1476K000

TDK EPCOS

CAP FILM 47UF 10% 100VDC RADIAL

0

B32672L8822J189

B32672L8822J189

TDK EPCOS

CAP FILM 8200PF 5% 2KVDC RADIAL

0

B32520C1224M289

B32520C1224M289

TDK EPCOS

CAP FILM 0.22UF 20% 100VDC RAD

0

B32524Q1106J000

B32524Q1106J000

TDK EPCOS

CAP FILM 10UF 100V METAL POLY

0

B32529C6472J189

B32529C6472J189

TDK EPCOS

CAP FILM 4700PF 5% 400VDC RADIAL

11200

B32652A3474J289

B32652A3474J289

TDK EPCOS

CAP FILM 0.47UF 5% 250VDC RADIAL

0

B25620B0447K883

B25620B0447K883

TDK EPCOS

CAP FILM 440UF 10% 900VDC RADIAL

32

B32024A3154M000

B32024A3154M000

TDK EPCOS

CAP FILM 0.15UF 20% 1.5KVDC RAD

6098

B32652J1332J189

B32652J1332J189

TDK EPCOS

CAP FILM 3300PF 5% 1.6KVDC RAD

0

B32621A4473J289

B32621A4473J289

TDK EPCOS

CAP FILM 0.047UF 5% 400VDC RAD

0

B32529C3273K289

B32529C3273K289

TDK EPCOS

CAP FILM 0.027UF 10% 250VDC RAD

0

B32653A3904J189

B32653A3904J189

TDK EPCOS

CAP FILM 0.9UF 5% 250VDC RADIAL

0

B32523Q3684K289

B32523Q3684K289

TDK EPCOS

CAP FILM 0.68UF 10% 250VDC RAD

0

B32933A3564K000

B32933A3564K000

TDK EPCOS

CAP FILM 0.56UF 10% 305VAC RAD

4344

B32653A4274J000

B32653A4274J000

TDK EPCOS

CAP FILM 0.27UF 5% 400VDC RADIAL

0

B32522E6104M189

B32522E6104M189

TDK EPCOS

CAP FILM 0.1UF 20% 400VDC RADIAL

0

B32653A0683K289

B32653A0683K289

TDK EPCOS

CAP FILM 0.068UF 10% 1KVDC RAD

0

B32320I1666K000

B32320I1666K000

TDK EPCOS

66MFD 1300V PP 50X120 PBT 5 PIN

0

B32529C6473J289

B32529C6473J289

TDK EPCOS

CAP FILM 0.047UF 5% 400VDC RAD

0

B32529C0184J000

B32529C0184J000

TDK EPCOS

CAP FILM 0.18UF 5% 63VDC RADIAL

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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