Film Capacitors

Part Number	Description / PDF	Quantity
MMK5183K100J01L16.5TA18 KEMET	CAP FILM 0.018UF 10% 100VDC RAD	9000
C4AQLBU5125A1YK KEMET	CAP FILM 12.5UF 10% 500VDC RAD	0
C878BF35350SA0J KEMET	CAP FILM 35UF 5% 470VAC RADIAL	0
PHE850EA4470MA03R17 KEMET	CAP FILM 4700PF 20% 1.25KVDC RAD	0
C44PPGR6100RASK KEMET	CAP FILM 100UF 10% 1.28KVDC RAD	0
C44AFGP5750ZA0J KEMET	CAP FILM 75UF 5% 400VDC RADIAL	14
R463I315040M2M KEMET	CAP FILM 0.15UF 20% 630VDC RAD	2661
R71VI4100ZA0EK KEMET	CAP FILM 1UF 10% 520VDC RADIAL	405
C44UOGT6550M84K KEMET	CAP FILM 550UF 10% 900VDC RADIAL	25
C4AQQBU4660M12J KEMET	CAP FILM 6.6UF 5% 1.1KVDC RADIAL	0
C44PKGR6150AASJ KEMET	CAP FILM 150UF 5% 1KVDC RADIAL	9
C44AFGP6100ZG0J KEMET	CAP FILM 100UF 5% 400VDC RADIAL	124
LDEEC2270KA5N00 KEMET	CAP FILM 0.027UF 10% 100VDC 1812	0
C44UVGT6110M82K KEMET	CAP FILM 110UF 10% 1.8KVDC RAD	6
C875CG36160AA0K KEMET	CAP FILM 160UF 10% 470VAC RADIAL	0
PHE845VF6330MR06L2 KEMET	CAP FILM 0.33UF 20% 1.5KVDC RAD	150
C878AF14400ZA4J KEMET	CAP FILM 4UF 5% 470VAC RADIAL	0
R75LN38204000K KEMET	CAP FILM 0.82UF 10% 560VDC RAD	28
F861DU225K310ZLH0J KEMET	CAP FILM 2.2UF 10% 310VAC RADIAL	3987
R76TI25605050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	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:

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.