Film Capacitors

Part Number	Description / PDF	Quantity
FKP4O132206F00JSSD WIMA	CAP FILM 0.22UF 5% 1KVDC RAD	347
DCP4L053007HD4KSSD WIMA	CAP FILM 30UF 10% 800VDC RAD	73
MKP1F042206F00KSSD WIMA	CAP FILM 2.2UF 10% 250VDC RAD	100
MKP1U031506F00KSSD WIMA	CAP FILM 0.15UF 10% 2KVDC RAD	591
MKPFBW42206F00KSSD WIMA	CAP FILM 2.2UF 10% 700VDC RAD	124
MKP4D046806F00KSSD WIMA	CAP FILM 6.8UF 10% 100VDC RAD	120
SMDID03220QB00MS00 WIMA	CAP FILM 0.22UF 20% 100VDC 2220	0
FKS2G013301A00MSSD WIMA	CAP FILM 3300PF 20% 400VDC RAD	7852
FKS2F011001A00JSSD WIMA	CAP FILM 1000PF 5% 250VDC RAD	10045
FKP1Y024707H00MSSD WIMA	CAP FILM 0.047UF 20% 6KVDC RAD	83
MKS2B033301A00KSSD WIMA	CAP FILM 0.33UF 10% 50VDC RAD	1241
MKP1F042206F00JSSD WIMA	CAP FILM 2.2UF 5% 250VDC RAD	462
MPRY2W2100FF00MSSD WIMA	CAP FILM 10000PF 20% 300VAC RAD	69
MKX2AW42206F00KSSD WIMA	CAP FILM 2.2UF 10% 305VAC RADIAL	294
MKS4O122204B00MSSD WIMA	CAP FILM 0.022UF 20% 1KVDC RAD	0
MKS2B033301A00MSSD WIMA	CAP FILM 0.33UF 20% 50VDC RAD	6266
FKP4U024706F00JSSD WIMA	CAP FILM 0.047UF 5% 2KVDC RAD	648
MKPF1W51507H00KSSD WIMA	CAP FILM 15UF 10% 600VDC RADIAL	104
MPX21W3330FJ00MSSD WIMA	CAP FILM 0.33UF 20% 275VAC RAD	979
MKX2AW51007H00KSSD WIMA	CAP FILM 10UF 10% 305VAC RADIAL	224

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.