Film Capacitors

Part Number	Description / PDF	Quantity
PHE450KD6220JR06L2 KEMET	CAP FILM 0.22UF 5% 400VDC RADIAL	0
C20ALGR5150AASK KEMET	CAP FILM 15UF 10% 1.4KVDC RADIAL	9
R463R410040M1K KEMET	CAP FILM 1UF 10% 630VDC RAD	988
C4AQPBU4330M11J KEMET	CAP FILM 3.3UF 5% 1.2KVDC RADIAL	0
R75QN32204000J KEMET	CAP FILM 0.22UF 5% 1KVDC RADIAL	300
R463I22204001M KEMET	CAP FILM 0.022UF 20% 630VDC RAD	1248
R82EC3330AA70J KEMET	CAP FILM 0.33UF 5% 100VDC RADIAL	3105
F161WP474K063V KEMET	CAP FILM 0.47UF 10% 63VDC SMD	0
R46KI347040P0M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	1710
C44USGT6400M87K KEMET	CAP FILM 400UF 10% 1.5KVDC RAD	10
PHE840MB6100MB05R17 KEMET	CAP FILM 0.1UF 20% 760VDC RADIAL	0
R46KN31500001K KEMET	CAP FILM 0.15UF 10% 560VDC RAD	0
P278SJ333M480A KEMET	CAP FILM 0.033UF 20% 480VAC RAD	744
R60MR4470AA40K KEMET	CAP FILM 4.7UF 10% 400VDC RADIAL	350
R76QD1100SE40J KEMET	CAP FILM 1000PF 5% 1KVDC RADIAL	447
PME271Y433MR30 KEMET	CAP FILM 3300PF 20% 1KVDC RADIAL	4982
R82DC3220AA60K KEMET	CAP FILM 0.22UF 10% 63VDC RADIAL	949
C44APFP4300ZB0J KEMET	CAP FILM 3UF 5% 1.2KVDC RADIAL	100
R46KI322000P0M KEMET	CAP FILM 0.22UF 20% 560VDC RAD	235
PHE844RR7220MR30L2 KEMET	CAP FILM 2.2UF 20% 1KVDC 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.