Film Capacitors

Part Number	Description / PDF	Quantity
R75TI1470AA00J KEMET	CAP FILM 4700PF 5% 1.6KVDC RAD	0
MMK15105J100B04L4BULK KEMET	CAP FILM 1UF 5% 100VDC RADIAL	108
R46KR422040M2M KEMET	CAP FILM 2.2UF 20% 560VDC RADIAL	268
R76QD0470SE00J KEMET	CAP FILM 470PF 5% 1KVDC RADIAL	3110
R76MR41004040J KEMET	CAP FILM 1UF 5% 400VDC RADIAL	2
R49AI21005001K KEMET	CAP FILM 10000PF 10% 800VDC RAD	900
R463I322040M2M KEMET	CAP FILM 0.22UF 20% 630VDC RAD	972
R60EI43305030J KEMET	CAP FILM 3.3UF 5% 100VDC RADIAL	470
R46KR34704001M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	398
LDEED3470KA0N00 KEMET	CAP FILM 0.47UF 10% 100VDC 2220	1408
R413F147050M1K KEMET	CAP FILM 4700PF 10% 1KVDC RADIAL	1441
R75IN41804040J KEMET	CAP FILM 1.8UF 5% 250VDC RADIAL	34
LDECA2220KA0N00 KEMET	CAP FILM 0.022UF 10% 50VDC 1206	0
F863BN334K310ALW0L KEMET	CAP FILM 0.33UF 10% 310VAC RAD	0
R533N415050P0K KEMET	CAP FILM 1.5UF 10% 630VDC RADIAL	0
R46KR447040P1M KEMET	CAP FILM 4.7UF 20% 560VDC RAD	0
C4ATDBW5200A30J KEMET	CAP FILM 20UF 5% 250VDC RADIAL	0
MMK5103J100J01L4BULK KEMET	CAP FILM 10000PF 5% 100VDC RAD	9884
R46KF3100CKM1M KEMET	CAP FILM 0.1UF 20% 560VDC RADIAL	1049
PHE426MR7390JR06L2 KEMET	CAP FILM 3.9UF 5% 630VDC RAD	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.