Film Capacitors

Part Number	Description / PDF	Quantity
MKP1U022205D00KSSD WIMA	CAP FILM 0.022UF 10% 2KVDC RAD	585
FKP3O104702B00MSSD WIMA	CAP FILM 470PF 20% 1KVDC RAD	3841
DCP4L054007ID4KSSD WIMA	CAP FILM 40UF 10% 800VDC RAD	813
SMDTC02100KA00MS00 WIMA	CAP FILM 10000PF 20% 63VDC 1812	0
DCP4L055007JD2JSC9 WIMA	CAP FILM 50UF 5% 800VDC RAD	8
MKP1G033305F00KSSD WIMA	CAP FILM 0.33UF 10% 400VDC RAD	1024
MKS4G044706G00MSSD WIMA	CAP FILM 4.7UF 20% 400VDC RAD	65
MKP2C024701C00KSSD WIMA	CAP FILM 0.047UF 10% 63VDC RAD	1891
SMDTD03220TA00MQ00 WIMA	CAP FILM 0.22UF 20% 100VDC 2824	1340
MKS4F036804D00KSSD WIMA	CAP FILM 0.68UF 10% 250VDC RAD	1700
MKS2B036801C00KSSD WIMA	CAP FILM 0.68UF 10% 50VDC RAD	1792
SMDIC03100QA00MP00 WIMA	CAP FILM 0.1UF 20% 63VDC 2220	10944
MKP1G016802C00KSSD WIMA	CAP FILM 6800PF 10% 400VDC RAD	8233
MKS0F026800E00KSSD WIMA	CAP FILM 0.068UF 10% 250VDC RAD	0
FKP3G012202C00KSSD WIMA	CAP FILM 2200PF 10% 400VDC RAD	2075
MKP1O112203C00JSSD WIMA	CAP FILM 2200PF 5% 1KVDC RAD	6147
MKX14W31005B00KSSD WIMA	CAP FILM 0.1UF 10% 440VAC RADIAL	971
MKP1U024706B00MSSD WIMA	CAP FILM 0.047UF 20% 2KVDC RAD	0
MKP2G011501B00KSSD WIMA	CAP FILM 1500PF 10% 400VDC RAD	7858
MKP4J031504F00MSSD WIMA	CAP FILM 0.15UF 20% 630VDC RAD	3379

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.