Film Capacitors

Part Number	Description / PDF	Quantity
FKP4T021505F00KSSD WIMA	CAP FILM 0.015UF 10% 1.6KVDC RAD	155
MKP1T024706A00KSSD WIMA	CAP FILM 0.047UF 10% 1.6KVDC RAD	206
FKP3G021504C00KSSD WIMA	CAP FILM 0.015UF 10% 400VDC RAD	970
SMDTG02470TB00MQ00 WIMA	CAP FILM 0.047UF 20% 400VDC 2824	1375
MKS4C053306F00KSSD WIMA	CAP FILM 33UF 10% 63VDC RAD	326
SMDIC03150QA00MP00 WIMA	CAP FILM 0.15UF 20% 63VDC 2220	1476
MKS4J036805I00KSSD WIMA	CAP FILM 0.68UF 10% 630VDC RAD	234
FKP2F001501D00JSC9 WIMA	CAP FILM 150PF 5% 250VDC RAD	7442
FKP2O106801G00HSSD WIMA	CAP FILM 680PF 2.5% 1KVDC RAD	24521
SMDIF02100QA00KS00 WIMA	CAP FILM 10000PF 10% 250VDC 2220	0
FKP1J022205D00JSSD WIMA	CAP FILM 0.022UF 5% 630VDC RAD	2027
DCP4N051507GD2KSSD WIMA	CAP FILM 15UF 10% 900VDC RADIAL	14
MKPF4W42206J00KSSD WIMA	CAP FILM 2.2UF 10% 1KVDC RADIAL	120
FKP2J021001L00JSC9 WIMA	CAP FILM 10000PF 5% 630VDC RAD	3860
MKS4C034702C00KSSD WIMA	CAP FILM 0.47UF 10% 63VDC RAD	5514
MKS4G034704F00KSSD WIMA	CAP FILM 0.47UF 10% 400VDC RAD	0
FKS2F011001A00KSSD WIMA	CAP FILM 1000PF 10% 250VDC RAD	10001
FKP0F011000B00KSSD WIMA	CAP FILM 1000PF 10% 250VDC RAD	2972
MKS4C043303G00KSSD WIMA	CAP FILM 3.3UF 10% 63VDC RAD	1254
MKS4U041009FD4KSSD WIMA	CAP FILM 1UF 10% 2KVDC RAD	46

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.