Film Capacitors

Part Number	Description / PDF	Quantity
MKP4F042205I00JSSD WIMA	CAP FILM 2.2UF 5% 250VDC RAD	290
SMDID04100XA00MT00 WIMA	CAP FILM 1UF 20% 100VDC 5040	1571
SMDTC04100QB00KP00 WIMA	CAP FILM 1UF 10% 63VDC 2220	693
MKY22W32205I00KSSD WIMA	CAP FILM 0.22UF 10% 300VAC RAD	51
MKP1V021005F00KSSD WIMA	CAP FILM 10000PF 10% 2.5KVDC RAD	2434
MKP1O132206B00KSSD WIMA	CAP FILM 0.22UF 10% 1KVDC RAD	1071
FKP1G022204D00KSSD WIMA	CAP FILM 0.022UF 10% 400VDC RAD	1192
FKP2O111001I00JSSD WIMA	CAP FILM 1000PF 5% 1KVDC RAD	4372
FKP4U022206B00JSSD WIMA	CAP FILM 0.022UF 5% 2KVDC RAD	418
SMDIJ02100XA00MT00 WIMA	CAP FILM 10000PF 20% 630VDC 5040	0
SMDTG03470YA00KS00 WIMA	CAP FILM 0.47UF 10% 400VDC 6054	0
FKP1J026806B00JSSD WIMA	CAP FILM 0.068UF 5% 630VDC RAD	0
FKP1G023304F00JSSD WIMA	CAP FILM 0.033UF 5% 400VDC RAD	2094
MKPF1W52007I00KSSD WIMA	CAP FILM 20UF 10% 600VDC RADIAL	63
SMDTF03100TB00MQ00 WIMA	CAP FILM 0.1UF 20% 250VDC 2824	447
FKP2F021501L00JSSD WIMA	CAP FILM 0.015UF 5% 250VDC RAD	566
FKP0C004700B00JSSD WIMA	CAP FILM 470PF 5% 63VDC RAD	5379
FKP0D002200B00KSSD WIMA	CAP FILM 220PF 10% 100VDC RAD	27894
SMDTD04470YA00MT00 WIMA	CAP FILM 4.7UF 20% 100VDC 6054	812
MKP1D042206D00JSSD WIMA	CAP FILM 2.2UF 5% 100VDC RAD	759

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.