Film Capacitors

Part Number	Description / PDF	Quantity
FKP1T022206B00KSSD WIMA	CAP FILM 0.022UF 10% 1.6KVDC RAD	0
SMDIF02470TB00KS00 WIMA	CAP FILM 0.047UF 10% 250VDC 2824	0
MKS2F033301K00KSSD WIMA	CAP FILM 0.33UF 10% 250VDC RAD	3296
MKS4J033306A00KSSD WIMA	CAP FILM 0.33UF 10% 630VDC RAD	485
FKP1T014705D00MSSD WIMA	CAP FILM 4700PF 20% 1.6KVDC RAD	218
FKP2O104701G00JSSD WIMA	CAP FILM 470PF 5% 1KVDC RAD	3448
FKS3F011002B00KSSD WIMA	CAP FILM 1000PF 10% 250VDC RAD	5885
MKP1U024706B00JSSD WIMA	CAP FILM 0.047UF 5% 2KVDC RAD	0
FKP1O121004F00MSSD WIMA	CAP FILM 10000PF 20% 1KVDC RAD	1658
FKP2D021501J00KSSD WIMA	CAP FILM 0.015UF 10% 100VDC RAD	9910
FKP3G013303D00KSSD WIMA	CAP FILM 3300PF 10% 400VDC RAD	2554
MKP1F044707F00JSSD WIMA	CAP FILM 4.7UF 5% 250VDC RAD	132
FKP2F011001D00HSSD WIMA	CAP FILM 1000PF 2.5% 250VDC RAD	3195
MKP4J041506F00MSC9 WIMA	CAP FILM 1.5UF 20% 630VDC RAD	799
MKS4D022203C00KSSD WIMA	CAP FILM 0.022UF 10% 100VDC RAD	920
SMDTC03330KB00MP00 WIMA	CAP FILM 0.33UF 20% 63VDC 1812	11298
MKS0C023300B00MSSD WIMA	CAP FILM 0.033UF 20% 63VDC RAD	11666
MKP1F042207C00KSSD WIMA	CAP FILM 2.2UF 10% 250VDC RAD	103
SMDTC03330KB00MS00 WIMA	CAP FILM 0.33UF 20% 63VDC 1812	0
SMDTC02150TA00MS00 WIMA	CAP FILM 0.015UF 20% 63VDC 2824	0

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.