Film Capacitors

Part Number	Description / PDF	Quantity
SMDTF03330XA00KT00 WIMA	CAP FILM 0.33UF 10% 250VDC 5040	1565
SMDTC03220TA00MQ00 WIMA	CAP FILM 0.22UF 20% 63VDC 2824	2700
MKXR3W33305G00JSSD WIMA	CAP FILM 0.33UF 5% 400VAC RAD	1266
FKP2G004701D00KSSD WIMA	CAP FILM 470PF 10% 400VDC RAD	10999
MPY20W1150FA00MSC9 WIMA	CAP FILM 1500PF 20% 250VAC RAD	516
FKP2G011501D00HSSD WIMA	CAP FILM 1500PF 2.5% 400VDC RAD	11826
MKXR3W32205F00MSSD WIMA	CAP FILM 0.22UF 20% 400VAC RAD	273
FKP4T031506J00KSSD WIMA	CAP FILM 0.15UF 10% 1.6KVDC RAD	317
FKP2C006801D00KSSD WIMA	CAP FILM 680PF 10% 63VDC RAD	1660
FKP1G022204D00JSD0 WIMA	CAP FILM 0.022UF 5% 400VDC RAD	953
FKP2J001001D00ESSD WIMA	CAP FILM 100PF 1% 630VDC RAD	1335
MKS2B036801C00JSSD WIMA	CAP FILM 0.68UF 5% 50VDC RAD	8635
MKS4G041006B00MSSD WIMA	CAP FILM 1UF 20% 400VDC RAD	750
MKP1T034706J00KSSD WIMA	CAP FILM 0.47UF 10% 1.6KVDC RAD	699
MKS4G034705B00JSSD WIMA	CAP FILM 0.47UF 5% 400VDC RAD	291
FKP0D006800B00KSSD WIMA	CAP FILM 680PF 10% 100VDC RAD	14410
SMDTC03100TA00MS00 WIMA	CAP FILM 0.1UF 20% 63VDC 2824	0
MKS2F021001A00JSSD WIMA	CAP FILM 10000PF 5% 250VDC RAD	9713
MKS2D031001A00MSSD WIMA	CAP FILM 0.1UF 20% 100VDC RAD	2029
MKP1G034705G00MSSD WIMA	CAP FILM 0.47UF 20% 400VDC RAD	799

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.