Film Capacitors

Image Part Number Description / PDF Quantity Rfq
25MU156MD35750

25MU156MD35750

Rubycon

CAP FILM 15UF 20% 25VDC 2220

483

16MU105MA23216

16MU105MA23216

Rubycon

CAP FILM 1UF 20% 16VDC 1206

2881

63MU101KZ12012

63MU101KZ12012

Rubycon

CAP FILM 100PF 10% 63VDC 0805

72

630MPB224J

630MPB224J

Rubycon

CAP FILM 0.22UF 5% 630VDC RADIAL

0

50MU102KY11608

50MU102KY11608

Rubycon

CAP FILM 1000PF 10% 50VDC 0603

4000

121MPE333J

121MPE333J

Rubycon

CAP FILM 0.033UF 5% 1.25KVDC RAD

724

35MU105MB13225

35MU105MB13225

Rubycon

CAP FILM 1UF 20% 35VDC 1210

0

25MU104MZ22012

25MU104MZ22012

Rubycon

CAP FILM 0.1UF 20% 25VDC 0805

0

16MU226MD35750

16MU226MD35750

Rubycon

CAP FILM 22UF 20% 16VDC 2220

129

50MU472KY11608

50MU472KY11608

Rubycon

CAP FILM 4700PF 10% 50VDC 0603

3954

35MU474KA13216

35MU474KA13216

Rubycon

CAP FILM 0.47UF 10% 35VDC 1206

4691

63MU473MA13216

63MU473MA13216

Rubycon

CAP FILM 0.047UF 20% 63VDC 1206

31

63MU684MC14532

63MU684MC14532

Rubycon

CAP FILM 0.68UF 20% 63VDC 1812

12

63MU683MA13216

63MU683MA13216

Rubycon

CAP FILM 0.068UF 20% 63VDC 1206

0

63MU681MZ12012

63MU681MZ12012

Rubycon

CAP FILM 680PF 20% 63VDC 0805

0

50MU154MA13216

50MU154MA13216

Rubycon

CAP FILM 0.15UF 20% 50VDC 1206

0

50MU225MC44532

50MU225MC44532

Rubycon

CAP FILM 2.2UF 20% 50VDC 1812

75

50MU332KY11608

50MU332KY11608

Rubycon

CAP FILM 3300PF 10% 50VDC 0603

3946

450MPK225J

450MPK225J

Rubycon

CAP FILM 2.2UF 5% 450VDC RADIAL

1568

63MU222KZ12012

63MU222KZ12012

Rubycon

CAP FILM 2200PF 10% 63VDC 0805

158

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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