Film Capacitors

Part Number	Description / PDF	Quantity
SMDTC03220KA00MS00 WIMA	CAP FILM 0.22UF 20% 63VDC 1812	0
FKP2D012201D00JSSD WIMA	CAP FILM 2200PF 5% 100VDC RAD	11520
FKP1U016805H00MSSD WIMA	CAP FILM 6800PF 20% 2KVDC RAD	0
FKP3G011002B00KSSD WIMA	CAP FILM 1000PF 10% 400VDC RAD	3430
DCP4G064009JD4KSSD WIMA	CAP FILM 400UF 10% 400VDC RAD	214
SMDID04100XA00MS00 WIMA	CAP FILM 1UF 20% 100VDC 5040	0
MKS0F016800B00MSSD WIMA	CAP FILM 6800PF 20% 250VDC RAD	6698
FKS3D022202B00MSSD WIMA	CAP FILM 0.022UF 20% 100VDC RAD	1336
MKP4G043306G00MSSD WIMA	CAP FILM 3.3UF 20% 400VDC RAD	97
DCP4L054007ID4MSSD WIMA	CAP FILM 40UF 20% 800VDC RAD	10
DCP4P052007JD4MSSD WIMA	CAP FILM 20UF 20% 1100VDC RAD	8
SMDTC03680QB00MP00 WIMA	CAP FILM 0.68UF 20% 63VDC 2220	395
MKP1U021005B00JSSD WIMA	CAP FILM 10000PF 5% 2KVDC RAD	0
SMDTD03330QB00MS00 WIMA	CAP FILM 0.33UF 20% 100VDC 2220	0
SMDTC03330QA00MP00 WIMA	CAP FILM 0.33UF 20% 63VDC 2220	2424
MKP4G032204D00MSSD WIMA	CAP FILM 0.22UF 20% 400VDC RAD	1455
MKY22W34707C00KSSD WIMA	CAP FILM 0.47UF 10% 300VAC RAD	408
MKP1D031003G00JSSD WIMA	CAP FILM 0.1UF 5% 100VDC RAD	3357
SMDNC04100TB00KQ00 WIMA	CAP FILM 1UF 10% 63VDC 2824	2500
MKS2D021001A00MSSD WIMA	CAP FILM 10000PF 20% 100VDC RAD	3819

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.