Film Capacitors

Part Number	Description / PDF	Quantity
MKP2D024701C00JSSD WIMA	CAP FILM 0.047UF 5% 100VDC RAD	0
FKS3D022202B00KSSD WIMA	CAP FILM 0.022UF 10% 100VDC RAD	3660
FKP2F011001D00KSSD WIMA	CAP FILM 1000PF 10% 250VDC RAD	2265
FKP4G041006J00JSSD WIMA	CAP FILM 1UF 5% 400VDC RAD	217
FKP1G031005H00MSSD WIMA	CAP FILM 0.1UF 20% 400VDC RAD	1119
MKS4F041005B00MSSD WIMA	CAP FILM 1UF 20% 250VDC RAD	113
FKP4O121004C00MSSD WIMA	CAP FILM 10000PF 20% 1KVDC RAD	812
MKP1U014705B00JSSD WIMA	CAP FILM 4700PF 5% 2KVDC RAD	1917
FKP4J001004B00JSSD WIMA	CAP FILM 100PF 5% 630VDC RAD	568
SMDTD04470YA00MS00 WIMA	CAP FILM 4.7UF 20% 100VDC 6054	0
SMDTF03330XA00MS00 WIMA	CAP FILM 0.33UF 20% 250VDC 5040	0
FKP1J021004D00MSSD WIMA	CAP FILM 10000PF 20% 630VDC RAD	780
MKP1V014704C00JSSD WIMA	CAP FILM 4700PF 5% 2.5KVDC RAD	7946
FKP1T021506B00JSSD WIMA	CAP FILM 0.015UF 5% 1.6KVDC RAD	0
SMDTC04470XA00MT00 WIMA	CAP FILM 4.7UF 20% 63VDC 5040	2186
DCP4L055007JD4KSSD WIMA	CAP FILM 50UF 10% 800VDC RAD	5
SMDTC03330KB00KS00 WIMA	CAP FILM 0.33UF 10% 63VDC 1812	0
MKP2D021501B00KSSD WIMA	CAP FILM 0.015UF 10% 100VDC RAD	634
MKX2AW51007I00KSSD WIMA	CAP FILM 10UF 10% 630VDC RAD	55
MKS4G051507G00KSSD WIMA	CAP FILM 15UF 10% 400VDC RAD	110

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.