Film Capacitors

Part Number	Description / PDF	Quantity
FKP1R014704D00MSSD WIMA	CAP FILM 4700PF 20% 1.25KVDC RAD	1893
SMDNC03470QB00KP00 WIMA	CAP FILM 0.47UF 10% 63VDC 2220	400
FKP2J016801J00JSSD WIMA	CAP FILM 6800PF 5% 630VDC RAD	1681
SMDIC02680KA00MP00 WIMA	CAP FILM 0.068UF 20% 63VDC 1812	6269
SMDIJ02470XA00KS00 WIMA	CAP FILM 0.047UF 10% 630VDC 5040	0
SMDIC04100TB00KS00 WIMA	CAP FILM 1UF 10% 63VDC 2824	0
MKS2F033301K00MSSD WIMA	CAP FILM 0.33UF 20% 250VDC RAD	3921
SMDID03220QB00MP00 WIMA	CAP FILM 0.22UF 20% 100VDC 2220	5848
SMDTF02470TA00MQ00 WIMA	CAP FILM 0.047UF 20% 250VDC 2824	5758
MKS2C043301K00MSSD WIMA	CAP FILM 3.3UF 20% 63VDC RAD	1167
FKP2D014701G00KSSD WIMA	CAP FILM 4700PF 10% 100VDC RAD	13425
MKP1F026804B00KSSD WIMA	CAP FILM 0.068UF 10% 250VDC RAD	5129
MPX21W3100FG00MSC9 WIMA	CAP FILM 0.1UF 20% 275VAC RAD	702
MKP4G036805F00KSSD WIMA	CAP FILM 0.68UF 10% 400VDC RAD	1095
FKP1T033307I00KSSD WIMA	CAP FILM 0.33UF 10% 1.6KVDC RAD	151
SMDIG02470VA00MS00 WIMA	CAP FILM 0.047UF 20% 400VDC 4030	0
FKP1U013305D00KSSD WIMA	CAP FILM 3300PF 10% 2KVDC RAD	447
SMDND04100TB00MQ00 WIMA	CAP FILM 1UF 20% 100VDC 2824	1722
FKP1R012204B00MSSD WIMA	CAP FILM 2200PF 20% 1.25KVDC RAD	0
FKP1O124706B00JSSD WIMA	CAP FILM 0.047UF 5% 1KVDC RAD	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.