Film Capacitors

Part Number	Description / PDF	Quantity
C4ASPBW4100A3FJ KEMET	CAP FILM 1UF 5% 1.2KVDC RADIAL	0
PHE840MK5330MK03R17 KEMET	CAP FILM 0.033UF 20% 760VDC RAD	1
R46KI315050M2K KEMET	CAP FILM 0.15UF 10% 560VDC RAD	0
R413F147000M1K KEMET	CAP FILM 4700PF 10% 1KVDC RADIAL	1039
R46KN347000P1K KEMET	CAP FILM 0.47UF 10% 560VDC RAD	589
PHE820ED6220MR06L2 KEMET	CAP FILM 0.22UF 20% 300VAC RAD	199
R75PW43904030J KEMET	CAP FILM 3.9UF 5% 630VDC RADIAL	234
R463I26804001M KEMET	CAP FILM 0.068UF 20% 630VDC RAD	2842
R46KI24704001M KEMET	CAP FILM 0.047UF 20% 560VDC RAD	955
PHE426KD6470JR06L2 KEMET	CAP FILM 0.47UF 5% 400VDC RADIAL	0
C4AF3EW5225A3BK KEMET	CAP FILM 22.5UF 10% 800VDC RAD	18
RSBCC4220CK10K KEMET	CAP FILM 2.2UF 10% 50VDC RADIAL	0
SMC7.3104J50K33TR12 KEMET	CAP FILM 0.1UF 5% 50VDC 2824	3
R75II32204040J KEMET	CAP FILM 0.22UF 5% 250VDC RADIAL	986
R76MD1680SE40J KEMET	CAP FILM 6800PF 5% 400VDC RADIAL	0
C276CCF5300LG0J KEMET	CAP FILM 30UF 5% 470VAC RADIAL	0
R76QF11504000K KEMET	CAP FILM 1500PF 10% 1KVDC RADIAL	769
R76UI04704000J KEMET	CAP FILM 470PF 5% 2KVDC RADIAL	195
R75PI3220ZA40K KEMET	CAP FILM 0.22UF 10% 630VDC RAD	608
R82IC2100Z350K KEMET	CAP FILM 10000PF 10% 250VDC RAD	35114

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:

Determine required capacitance and voltage ratings with safety margins
Assess environmental conditions (temperature, humidity, vibration)
Evaluate dielectric absorption and frequency response requirements
Consider packaging constraints (through-hole vs. surface-mount)
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.