Film Capacitors

Part Number	Description / PDF	Quantity
PHE450RF6150JR06L2 KEMET	CAP FILM 0.15UF 5% 1.6KVDC RAD	792
R533R415050P0K KEMET	CAP FILM 1.5UF 10% 630VDC RADIAL	672
R76TR322050H3J KEMET	CAP FILM 0.22UF 5% 1.6KVDC RAD	61
R75RN31004030J KEMET	CAP FILM 0.1UF 5% 1.25KVDC RAD	363
R75LI28204000K KEMET	CAP FILM 0.082UF 10% 560VDC RAD	30
R75LN34704000K KEMET	CAP FILM 0.47UF 10% 630VDC RAD	584
C4AQQBW5120M3JJ KEMET	CAP FILM 12UF 5% 1.1KVDC RADIAL	0
R413F147040M1K KEMET	CAP FILM 4700PF 10% 1KVDC RADIAL	0
R76TF12705050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
C4AQNEW5550M3AJ KEMET	CAP FILM 55UF 5% 1KVDC RADIAL	0
C4GAMUB3220AA0J KEMET	CAP FILM 0.22UF 5% 850VDC AXIAL	216
P295BJ222M500A KEMET	CAP FILM 2200PF 20% 500VAC RAD	1672
PFR5471J63J11L4BULK KEMET	CAP FILM 470PF 5% 63VDC RADIAL	886
R46KR447050P1M KEMET	CAP FILM 4.7UF 20% 560VDC RAD	0
R75PW447050H3J KEMET	CAP FILM 4.7UF 5% 630VDC RADIAL	83
R75TN239050H3J KEMET	CAP FILM 0.039UF 5% 1.6KVDC RAD	249
R413R347050T0K KEMET	CAP FILM 0.47UF 10% 1.5KVDC RAD	128
R75MI26804030J KEMET	CAP FILM 0.068UF 5% 400VDC RAD	1980
C44UUGT6470M52K KEMET	CAP FILM 470UF 10% 1.3KVDC RAD	1
C4AQUBW5250A3NJ KEMET	CAP FILM 25UF 5% 1.3KVDC RADIAL	26

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.