Film Capacitors

Part Number	Description / PDF	Quantity
PHE450MK4470JR05 KEMET	CAP FILM 4700PF 5% 630VDC RADIAL	6216
R79IC2330AA45J KEMET	CAP FILM 0.033UF 5% 250VDC RAD	1428
R66DD4220AA6AJ KEMET	CAP FILM 2.2UF 5% 63VDC RADIAL	930
R46KI315000M2K KEMET	CAP FILM 0.15UF 10% 560VDC RAD	829
R46KI21004001M KEMET	CAP FILM 10000PF 20% 560VDC RAD	0
R60MI3330DQ30K KEMET	CAP FILM 0.33UF 10% 400VDC RAD	1000
R76PN34705050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
C4AQJBU5110M1EJ KEMET	CAP FILM 11UF 5% 700VDC RADIAL	0
R46KN347000M1K KEMET	CAP FILM 0.47UF 10% 560VDC RAD	365
R82DC3150AA60K KEMET	CAP FILM 0.15UF 10% 63VDC RAD	2911
R60IF3100AA6AK KEMET	CAP FILM 0.1UF 10% 250VDC RADIAL	0
R75PR418050H3J KEMET	CAP FILM 1.8UF 5% 630VDC RADIAL	128
F871DO474M330Z KEMET	CAP FILM 0.47UF 20% 330VAC RAD	0
PHE840MB6100KB05R17 KEMET	CAP FILM 0.1UF 10% 760VDC RADIAL	800
R75UI222050H3J KEMET	CAP FILM 0.022UF 5% 2KVDC RADIAL	0
PHE844RF7100MR06L2 KEMET	CAP FILM 1UF 20% 1KVDC RADIAL	0
R60IN43305030K KEMET	CAP FILM 3.3UF 10% 250VDC RADIAL	147
R75IW533050H4J KEMET	CAP FILM 33UF 5% 250VDC RADIAL	37
MMK5223J50J01L4BULK KEMET	CAP FILM 0.022UF 5% 50VDC RADIAL	2000
C4AQCBW5550A3MJ KEMET	CAP FILM 55UF 5% 650VDC RADIAL	14

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.