Film Capacitors

Part Number	Description / PDF	Quantity
DCP4L055007JD2KSSD WIMA	CAP FILM 50UF 10% 800VDC RAD	57
DCP4I061509JD4KSSD WIMA	CAP FILM 150UF 10% 600VDC RAD	0
MKY22W31805G00KSSD WIMA	CAP FILM 0.18UF 10% 300VAC RAD	365
SMDTF03220TB00KQ00 WIMA	CAP FILM 0.22UF 10% 250VDC 2824	444
FKP1J026806B00JSC9 WIMA	CAP FILM 0.068UF 5% 630VDC RAD	915
DCP4P051007GD2KSSD WIMA	CAP FILM 10UF 10% 1.1KVDC RADIAL	65
MKP2G013301B00KSSD WIMA	CAP FILM 3300PF 10% 400VDC RAD	19834
MKP1U032207E00JSSD WIMA	CAP FILM 0.22UF 5% 2KVDC RAD	0
FKP1T012204F00JSSD WIMA	CAP FILM 2200PF 5% 1.6KVDC RAD	488
FKP3J021004C00JSSD WIMA	CAP FILM 10000PF 5% 630VDC RAD	581
MKP1J026805B00KSSD WIMA	CAP FILM 0.068UF 10% 630VDC RAD	1943
MKP4O121002F00MSSD WIMA	CAP FILM 10000PF 20% 1KVDC RAD	4017
FKP2F021501L00KSSD WIMA	CAP FILM 0.015UF 10% 250VDC RAD	4003
FKP2J016801J00ESSD WIMA	CAP FILM 6800PF 1% 630VDC RAD	637
FKP0D016800E00KSSD WIMA	CAP FILM 6800PF 10% 100VDC RAD	1194
FKP0D013300D00KSSD WIMA	CAP FILM 3300PF 10% 100VDC RAD	3344
SMDTC04100QB00MP00 WIMA	CAP FILM 1UF 20% 63VDC 2220	1845
MKS0C033300D00MSSD WIMA	CAP FILM 0.33UF 20% 63VDC RAD	8615
MKS4J041006B00MSSD WIMA	CAP FILM 1UF 20% 630VDC RAD	918
MKP1D043306G00KSC9 WIMA	CAP FILM 3.3UF 10% 100VDC RAD	710

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.