Film Capacitors

Part Number	Description / PDF	Quantity
FKP3G012203D00JSSD WIMA	CAP FILM 2200PF 5% 400VDC RAD	6205
SMDTC04470XA00KT00 WIMA	CAP FILM 4.7UF 10% 63VDC 5040	875
MKS2F034701M00KSSD WIMA	CAP FILM 0.47UF 10% 250VDC RAD	3228
FKP4R032206J00KSSD WIMA	CAP FILM 0.22UF 10% 1.25KVDC RAD	167
MKS2B041501E00JSSD WIMA	CAP FILM 1.5UF 5% 50VDC RAD	510
MKS2C024701A00KSSD WIMA	CAP FILM 0.047UF 10% 63VDC RAD	15400
MKP2G023301H00KSSD WIMA	CAP FILM 0.033UF 10% 400VDC RAD	6738
FKP2C023301L00KSSD WIMA	CAP FILM 0.033UF 10% 63VDC RAD	1840
SMDTG03470YA00KT00 WIMA	CAP FILM 0.47UF 10% 400VDC 6054	641
FKP1T006804B00JSD0 WIMA	CAP FILM 680PF 5% 1.6KVDC RADIAL	2829
FKP1R021505F00KSSD WIMA	CAP FILM 0.015UF 10% 1250VDC RAD	982
MKS2D026801A00MSSD WIMA	CAP FILM 0.068UF 20% 100VDC RAD	9657
FKP2O100681D00KSSD WIMA	CAP FILM 68PF 10% 1KVDC RAD	4970
SMDTF04100YA00JT00 WIMA	CAP FILM 1UF 5% 250VDC 6054	1021
FKP1J024705H00MSSD WIMA	CAP FILM 0.047UF 20% 630VDC RAD	232
MKP4F046806G00KSSD WIMA	CAP FILM 6.8UF 10% 250VDC RAD	49
FKP1J032207D00KSSD WIMA	CAP FILM 0.22UF 10% 630VDC RAD	0
MKP1U031006D00JSSD WIMA	CAP FILM 0.1UF 5% 2KVDC RAD	1502
FKP1U012205D00JSSD WIMA	CAP FILM 2200PF 5% 2KVDC RAD	1493
SMDTC04100QB00MS00 WIMA	CAP FILM 1UF 20% 63VDC 2220	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.