Film Capacitors

Part Number	Description / PDF	Quantity
R46KN347045N0M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	2226
PHE426DJ5470JR05 KEMET	CAP FILM 0.047UF 5% 100VDC RAD	5948
R75MD2470Z3B0J KEMET	CAP FILM 0.047UF 5% 400VDC RAD	890
C4AF9BU4330T11K KEMET	CAP FILM 3.3UF 10% 630VDC RADIAL	216
C4BSNBX4100ZEFJ KEMET	CAP FILM 1UF 5% 1KVDC SCREW	0
R46KI31000001K KEMET	CAP FILM 0.1UF 10% 560VDC RADIAL	67
F43KI2470ZA01K KEMET	CAP FILM 0.047UF 10% 275VAC RAD	998
R46KN368000P0M KEMET	CAP FILM 0.68UF 20% 560VDC RAD	875
R46KI3220JBL2K KEMET	CAP FILM 0.22UF 10% 560VDC RAD	998
SMR10224J100A01L4BULK KEMET	CAP FILM 0.22UF 5% 100VDC RADIAL	0
R82EC2470AA60J KEMET	CAP FILM 0.047UF 5% 100VDC RAD	49325
LDEED3330MA5N00 KEMET	CAP FILM 0.33UF 20% 100VDC 2220	0
F861KJ333M310A KEMET	CAP FILM 0.033UF 20% 630VDC RAD	1715
C4AF1BU4680A12K KEMET	CAP FILM 6.8UF 10% 250VAC RADIAL	33
R76PR412050H3J KEMET	CAP FILM 1.2UF 5% 630VDC RADIAL	249
R463I2680JHH1M KEMET	CAP FILM 0.068UF 20% 630VDC RAD	1999
R60MF2680506AK KEMET	CAP FILM 0.068UF 10% 400VDC RAD	0
LDEEB2470JA0N00 KEMET	CAP FILM 0.047UF 5% 100VDC 1210	4329
R82IC2220DQ60J KEMET	CAP FILM 0.022UF 5% 250VDC RAD	3479
MMK5124J63J01L4BULK KEMET	CAP FILM 0.12UF 5% 63VDC 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.