Film Capacitors

Part Number	Description / PDF	Quantity
R60IN42205030K KEMET	CAP FILM 2.2UF 10% 250VDC RADIAL	185
R46KR368000M1K KEMET	CAP FILM 0.68UF 10% 560VDC RAD	1183
R413I2150DQM1M KEMET	CAP FILM 0.015UF 20% 1KVDC RAD	0
C4AQIBU4400A1XJ KEMET	CAP FILM 4UF 5% 800VDC RADIAL	30
C4AQQBW5140A3JJ KEMET	CAP FILM 14UF 5% 1.1KVDC RADIAL	59
C4AQLEW6210M3BK KEMET	CAP FILM 210UF 10% 500VDC RADIAL	0
C9TS6MD5548AARX KEMET	CAP FILM 54.8UF 440VAC RADIAL	2
R46KI347050M1K KEMET	CAP FILM 0.47UF 10% 560VDC RAD	569
PHE450MD6330JR06L2 KEMET	CAP FILM 0.33UF 5% 630VDC RADIAL	532
R533N356050P0K KEMET	CAP FILM 0.56UF 10% 630VDC RAD	0
PHE450MR7270JR06L2 KEMET	CAP FILM 2.7UF 5% 630VDC RADIAL	1833
R75PI312050H3J KEMET	CAP FILM 0.12UF 5% 630VDC RADIAL	640
PHE450PB5100JR06 KEMET	CAP FILM 10000PF 5% 1KVDC RADIAL	0
R75RN282050H3J KEMET	CAP FILM 0.08UF 5% 1.25KVDC RAD	300
R60II3470AA30K KEMET	CAP FILM 0.47UF 10% 250VDC RAD	556
R60QF1100AA01K KEMET	CAP FILM 1000PF 10% 1KVDC RADIAL	61
R76UI056050H4J KEMET	CAP FILM 560PF 5% 2KVDC RADIAL	1269
R60QW42205030K KEMET	CAP FILM 2.2UF 10% 1KVDC RADIAL	0
PME271YD6100MR30 KEMET	CAP FILM 0.1UF 20% 1KVDC RADIAL	396
C44PLGR6100RASJ KEMET	CAP FILM 100UF 5% 700VDC RAD	25

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.