Film Capacitors

Part Number	Description / PDF	Quantity
R75PI33905030J KEMET	CAP FILM 0.39UF 5% 630VDC RADIAL	700
SMC5.7104J50J35TR12 KEMET	CAP FILM 0.1UF 5% 50VDC 2220	914
R76QF082050H0J KEMET	CAP FILM 820PF 5% 1KVDC RADIAL	2650
R60DR52204030K KEMET	CAP FILM 22UF 10% 63VDC RADIAL	241
R60EN46804030J KEMET	CAP FILM 6.8UF 5% 100VDC RADIAL	0
R82DC4100DQ60J KEMET	CAP FILM 1UF 5% 63VDC RADIAL	0
MMK5273J50J01L4BULK KEMET	CAP FILM 0.027UF 5% 50VDC RADIAL	1988
C284ACA4200AL0J KEMET	CAP FILM 2UF 5% 470VAC RADIAL	7
C4AQSLW4600A36J KEMET	CAP FILM 6UF 5% 1.5KVDC RADIAL	22
R463W447050M1K KEMET	CAP FILM 4.7UF 10% 630VDC RAD	401
R60MI3470AA30K KEMET	CAP FILM 0.47UF 10% 400VDC RAD	1000
R73TR2470SE00J KEMET	CAP FILM 0.047UF 5% 1.6KVDC RAD	242
PHE426HJ6100JR05 KEMET	CAP FILM 0.1UF 5% 250VDC RADIAL	5932
LDECC3100MA5N00 KEMET	CAP FILM 0.1UF 20% 50VDC 1812	0
R76QW410050H3J KEMET	CAP FILM 1UF 5% 1KVDC RADIAL	96
R82EC1220SH50J KEMET	CAP FILM 2200PF 5% 100VDC RADIAL	52500
C878BG35600SA0J KEMET	CAP FILM 60UF 5% 470VAC RADIAL	0
R60IN4100AA30K KEMET	CAP FILM 1UF 10% 250VDC RADIAL	1492
MMK5394J100J04L4BULK KEMET	CAP FILM 0.39UF 5% 100VDC RADIAL	939
C875CF36100AA0K KEMET	CAP FILM 100UF 10% 470VAC 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.