Film Capacitors

Part Number	Description / PDF	Quantity
R75PR412050H4J KEMET	CAP FILM 1.2UF 5% 630VDC RADIAL	176
R75PR4150AA30K KEMET	CAP FILM 1.5UF 10% 630VDC RADIAL	0
C4ASMBW4200A3HJ KEMET	CAP FILM 2UF 5% 850VDC RADIAL	0
SMR7.5104K100K01L4BULK KEMET	CAP FILM 0.1UF 10% 100VDC RADIAL	971
R76QF0470DQ00J KEMET	CAP FILM 470PF 5% 1KVDC RADIAL	995
LDEPD2100KA5N00 KEMET	CAP FILM 10000PF 10% 630VDC 2220	41114
R463R433050M2K KEMET	CAP FILM 3.3UF 10% 630VDC RAD	127
C4AQILW5150A36J KEMET	CAP FILM 15UF 5% 800VDC RADIAL	60
PHE840MB6470MB16R17 KEMET	CAP FILM 0.47UF 20% 760VDC RAD	6980
SMC5.7222J50J33TR12 KEMET	CAP FILM 2200PF 5% 50VDC 2220	0
R523N410050P1M KEMET	CAP FILM 1UF 20% 630VDC RADIAL	410
R46KR433000M2M KEMET	CAP FILM 3.3UF 20% 560VDC RADIAL	509
R463I32205002K KEMET	CAP FILM 0.22UF 10% 630VDC RAD	1400
R747I1470AA00J KEMET	CAP FILM 4700PF 5% 2KVDC RADIAL	1462
PHE840MX6330MB11R17 KEMET	CAP FILM 0.33UF 20% 760VDC RAD	9284
R82MC2330Z350J KEMET	CAP FILM 0.033UF 5% 400VDC RAD	934
R46KF2100DQN0M KEMET	CAP FILM 10000PF 20% 560VDC RAD	1000
LDEEF4220KA0N00 KEMET	CAP FILM 2.2UF 10% 100VDC 4030	913
R75TW333050L3J KEMET	CAP FILM 0.33UF 5% 1.6KVDC RAD	70
R75QI268050H0J KEMET	CAP FILM 0.068UF 5% 1KVDC RADIAL	500

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.