Film Capacitors

Part Number	Description / PDF	Quantity
R82EC2150AA50K KEMET	CAP FILM 0.015UF 10% 100VDC RAD	270
R82IC2220DQ50K KEMET	CAP FILM 0.022UF 10% 250VDC RAD	5000
R463N347050N0K KEMET	CAP FILM 0.47UF 10% 630VDC RAD	1192
LDEED3220KA5N00 KEMET	CAP FILM 0.22UF 10% 100VDC 2220	1833
R46KI315000M2M KEMET	CAP FILM 0.15UF 20% 560VDC RAD	51
C870ZF35600AA2J KEMET	CAP FILM 60UF 5% 470VAC RADIAL	0
MMK10223K400A01L4BULK KEMET	CAP FILM 0.022UF 10% 400VDC RAD	1998
SMC10.2334J50A31TR16 KEMET	CAP FILM 0.33UF 5% 50VDC SMD	16
SMR10333K100A01L4BULK KEMET	CAP FILM 0.033UF 10% 100VDC RAD	0
R76QN24704030J KEMET	CAP FILM 0.047UF 5% 1KVDC RADIAL	1104
C44BXFP3100ZA0J KEMET	CAP FILM 0.1UF 5% 2.4KVDC RADIAL	0
R75UN24704030J KEMET	CAP FILM 0.047UF 5% 2KVDC RADIAL	50
R46KI3100JNM1M KEMET	CAP FILM 0.1UF 20% 560VDC RADIAL	1810
R523I322050P0K KEMET	CAP FILM 0.22UF 10% 630VDC RAD	498
C4AQPLW4350M33J KEMET	CAP FILM 3.5UF 5% 1.2KVDC RADIAL	0
R75MD2220Z340J KEMET	CAP FILM 0.022UF 5% 400VDC RAD	1500
R60PI2470AA30K KEMET	CAP FILM 0.047UF 10% 630VDC RAD	0
R82EC2560JE60K KEMET	CAP FILM 0.056UF 10% 100VDC RAD	1985
C4AQIBW5550A3NJ KEMET	CAP FILM 55UF 5% 800VDC RADIAL	3
C4AQLBW5400M3FK KEMET	CAP FILM 40UF 10% 500VDC RADIAL	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.