Film Capacitors

Part Number	Description / PDF	Quantity
R75IN33305030J KEMET	CAP FILM 0.33UF 5% 250VDC RADIAL	1000
R66ED4100AA7AK KEMET	CAP FILM 1UF 10% 100VDC RADIAL	370
C4AF9BU4330A11K KEMET	CAP FILM 3.3UF 10% 310VAC RADIAL	227
PHE820EB5680MR17 KEMET	CAP FILM 0.068UF 20% 760VDC RAD	0
R75TI13305030J KEMET	CAP FILM 3300PF 5% 1.6KVDC RAD	1500
LDEDA2330KA0N00 KEMET	CAP FILM 0.033UF 10% 63VDC 1206	0
R73TN2220SE00J KEMET	CAP FILM 0.022UF 5% 1.6KVDC RAD	196
LDEEC3100MA5N00 KEMET	CAP FILM 0.1UF 20% 100VDC 1812	0
PHE450RD5470JR06L2 KEMET	CAP FILM 0.047UF 5% 1.6KVDC RAD	0
R474I282050A1KV057 KEMET	CAP FILM 0.08UF 10% 1KVDC RADIAL	0
C4AQLLW5120A34K KEMET	CAP FILM 12UF 10% 500VDC RADIAL	101
R46KI28200001M KEMET	CAP FILM 0.082UF 20% 560VDC RAD	0
LDEQG2680KA5N00 KEMET	CAP FILM 0.068UF 10% 1KVDC 5040	390
PME261KA5100KR19T0 KEMET	CAP FILM 10000PF 10% 400VDC RAD	4200
R60PI24704030K KEMET	CAP FILM 0.047UF 10% 630VDC RAD	1000
PHE426HD7150JR06L2 KEMET	CAP FILM 1.5UF 5% 250VDC RAD	0
MMK27.5106K100F12L4TRAY KEMET	CAP FILM 10UF 10% 100VDC RADIAL	0
R463W468000M2M KEMET	CAP FILM 6.8UF 20% 630VDC RADIAL	8
PME261JB5100KR30 KEMET	CAP FILM 10000PF 10% 1KVDC RAD	456
LDEMD2330KA5N00 KEMET	CAP FILM 0.033UF 10% 400VDC 2220	7

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.