Film Capacitors

Part Number	Description / PDF	Quantity
MKP4G026802F00KSSD WIMA	CAP FILM 0.068UF 10% 400VDC RAD	4164
MKS4C042204C00MSSD WIMA	CAP FILM 2.2UF 20% 63VDC RAD	555
FKP1Y021006F00JSSD WIMA	CAP FILM 10000PF 5% 6KVDC RAD	410
MKX2AW32204H00KSSD WIMA	CAP FILM 0.22UF 10% 630VDC RAD	514
DCP4L052007GD4KSSD WIMA	CAP FILM 20UF 10% 800VDC RADIAL	229
MKX2AW45607F00KSSD WIMA	CAP FILM 5.6UF 10% 630VDC RAD	31
MKS2C034701C00MSSD WIMA	CAP FILM 0.47UF 20% 63VDC RAD	11468
FKS3G014703A00KSSD WIMA	CAP FILM 4700PF 10% 400VDC RAD	10707
FKP0G003300B00KSSD WIMA	CAP FILM 330PF 10% 400VDC RAD	6898
MKS2D021501A00MSSD WIMA	CAP FILM 0.015UF 20% 100VDC RAD	3057
MKP4O134706D00KSSD WIMA	CAP FILM 0.47UF 10% 1KVDC RAD	318
SMDTC04100VA00KR00 WIMA	CAP FILM 1UF 10% 63VDC 4030	588
MKP4F034704D00KSSD WIMA	CAP FILM 0.47UF 10% 250VDC RAD	1522
DCP4G054006JD2KSSD WIMA	CAP FILM 40UF 10% 400VDC RADIAL	306
MKP2J013301B00KSSD WIMA	CAP FILM 3300PF 10% 630VDC RAD	11382
MKP1U011003C00JSSD WIMA	CAP FILM 1000PF 5% 2KVDC RAD	9506
FKP1G022205A00MSSD WIMA	CAP FILM 0.022UF 20% 400VDC RAD	372
MKX2AW32205B00KSSD WIMA	CAP FILM 0.22UF 10% 630VDC RAD	11
MKP2G016801B00JSSD WIMA	CAP FILM 6800PF 5% 400VDC RAD	1326
FKP2F003301D00JSSD WIMA	CAP FILM 330PF 5% 250VDC RAD	12758

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.