Film Capacitors

Part Number	Description / PDF	Quantity
R71VI36804030K KEMET	CAP FILM 0.68UF 10% 520VDC RAD	48
R46KI310040M1K KEMET	CAP FILM 0.1UF 10% 560VDC RADIAL	21758
R75QI2220AA00K KEMET	CAP FILM 0.022UF 10% 1KVDC RAD	1618
C4AQLLW5160A33K KEMET	CAP FILM 16UF 10% 500VDC RADIAL	44
C4AQPBU4500M12J KEMET	CAP FILM 5UF 5% 1.2KVDC RADIAL	0
R60EN51004030K KEMET	CAP FILM 10UF 10% 100VDC RADIAL	121
R46KI347040H1M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	349
R82EC2330DQ50J KEMET	CAP FILM 0.033UF 5% 100VDC RAD	12842
PME271M610MR04 KEMET	CAP FILM 0.1UF 20% 275VAC RADIAL	1479
R76UI1470SE40J KEMET	CAP FILM 4700PF 5% 2KVDC RADIAL	2101
R413I215000M1M KEMET	CAP FILM 0.015UF 20% 1KVDC RAD	101246
R46KI310050M1K KEMET	CAP FILM 0.1UF 10% 560VDC RADIAL	31644
R49AN322000B1M KEMET	CAP FILM 0.22UF 20% 800VDC RAD	620
R75TR315050L3J KEMET	CAP FILM 0.15UF 5% 1.6KVDC RAD	144
R46KR415000M1K KEMET	CAP FILM 1.5UF 10% 560VDC RADIAL	1281
LDEEC2220JA5N00 KEMET	CAP FILM 0.022UF 5% 100VDC 1812	3173
C44PPGR5680RASK KEMET	CAP FILM 68UF 10% 1.28KVDC RAD	9
R75PI31504030J KEMET	CAP FILM 0.15UF 5% 630VDC RADIAL	302
PHE450TD5470JD19R06L2 KEMET	CAP FILM 0.047UF 5% 2.5KVDC RAD	0
R75RN312050H3J KEMET	CAP FILM 0.12UF 5% 1.25KVDC RAD	20

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.