Film Capacitors

Part Number	Description / PDF	Quantity
MKX2AW31004B00KSSD WIMA	CAP FILM 0.1UF 10% 630VDC RAD	2701
SMDIC02680KA00MS00 WIMA	CAP FILM 0.068UF 20% 63VDC 1812	0
FKP3D031004D00KSSD WIMA	CAP FILM 0.1UF 10% 100VDC RAD	3106
MKS4S021504C00KSSD WIMA	CAP FILM 0.015UF 10% 1.5KVDC RAD	417
MKP4F041505G00KSSD WIMA	CAP FILM 1.5UF 10% 250VDC RAD	0
SMDTD04100TB00MQ00 WIMA	CAP FILM 1UF 20% 100VDC 2824	3503
FKP1J016804C00KSSD WIMA	CAP FILM 6800PF 10% 630VDC RAD	501
MKP4J041506F00JSSD WIMA	CAP FILM 1.5UF 5% 630VDC RAD	1956
MKP1T026806A00KSSD WIMA	CAP FILM 0.068UF 10% 1.6KVDC RAD	500
FKP2J021001L00KSSD WIMA	CAP FILM 10000PF 10% 630VDC RAD	1342
MKP1U031006D00MSSD WIMA	CAP FILM 0.1UF 20% 2KVDC RAD	0
FKP1Y011505D00JSSD WIMA	CAP FILM 1500PF 5% 6KVDC RAD	539
MKS0C021500B00JSSD WIMA	CAP FILM 0.015UF 5% 63VDC RAD	1659
MKP2J021001E00JSSD WIMA	CAP FILM 10000PF 5% 630VDC RAD	7800
FKP1Y021006F00KSC9 WIMA	CAP FILM 10000PF 10% 6KVDC RAD	137
FKP1G031506B00JSSD WIMA	CAP FILM 0.15UF 5% 400VDC RAD	1370
DCP4N055009FD4KSSD WIMA	CAP FILM 50UF 10% 900VDC RAD	23
MKS2D032201C00MSSD WIMA	CAP FILM 0.22UF 20% 100VDC RAD	10200
FKP1G031005H00JSSD WIMA	CAP FILM 0.1UF 5% 400VDC RAD	0
SMDID02470QA00KP00 WIMA	CAP FILM 0.047UF 10% 100VDC 2220	1866

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.