Film Capacitors

Part Number	Description / PDF	Quantity
C4AQQBW5180M36J KEMET	CAP FILM 18UF 5% 1.1KVDC RADIAL	0
PHE450RB5150JR06 KEMET	CAP FILM 0.015UF 5% 1.6KVDC RAD	944
C44ASGP4500ZB0J KEMET	CAP FILM 5UF 5% 1.5KVDC RADIAL	2
R75QR41004000J KEMET	CAP FILM 1UF 5% 1KVDC RAD	0
R474F147050A1M KEMET	CAP FILM 4700PF 20% 1KVDC RAD	0
C3B2AD44800B20K KEMET	CAP FILM 250V	440
C878AF25120AA0J KEMET	CAP FILM 12UF 5% 470VAC RADIAL	0
R46KN333000N0K KEMET	CAP FILM 0.33UF 10% 560VDC RAD	304
R46KR433050M2M KEMET	CAP FILM 3.3UF 20% 560VDC RADIAL	0
C44AMLP5200ZA0J KEMET	CAP FILM 20UF 5% 850VDC RADIAL	0
PHE450PA5100JR17T0 KEMET	CAP FILM 10000PF 5% 1KVDC RADIAL	0
R463N415040N1M KEMET	CAP FILM 1.5UF 20% 630VDC RAD	480
C20AZGR5220AASK KEMET	CAP FILM 22UF 10% 2.3KVDC RADIAL	59
LDEED3470MA0N00 KEMET	CAP FILM 0.47UF 20% 100VDC 2220	0
R76MN32705050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
PFR5561F63J11L4BULK KEMET	CAP FILM 560PF 1% 63VDC RADIAL	0
R76MR382050H3J KEMET	CAP FILM 0.82UF 5% 400VDC RAD	286
C44AHGP5400ZB0J KEMET	CAP FILM 40UF 5% 600VDC RADIAL	112
R463I322000M2K KEMET	CAP FILM 0.22UF 10% 630VDC RAD	742
C4AQPEW5220M3CJ KEMET	CAP FILM 22UF 5% 1.2KVDC 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.