Film Capacitors

Part Number	Description / PDF	Quantity
MMK5223K50J01L4BULK KEMET	CAP FILM 0.022UF 10% 50VDC RAD	1999
PHE426KJ4150JR05 KEMET	CAP FILM 1500PF 5% 400VDC RAD	0
C284ACA4250AL0J KEMET	CAP FILM 2.5UF 5% 470VAC RADIAL	9
R75GR44704030J KEMET	CAP FILM 4.7UF 5% 160VDC RAD	103
C4AQIBW5600M3NJ KEMET	CAP FILM 60UF 5% 800VDC RADIAL	0
C44AMGP5300ZA0J KEMET	CAP FILM 30UF 5% 850VDC RADIAL	106
PME271YE6100MR30 KEMET	CAP FILM 0.1UF 20% 1KVDC RADIAL	0
PHE450HK5150JR17 KEMET	CAP FILM 0.015UF 5% 250VDC RAD	1000
C4AQNBW5250M3OJ KEMET	CAP FILM 25UF 5% 1KVDC RADIAL	0
C274AC24315SB0J KEMET	CAP FILM 3.15UF 5% 470VAC RAD	486
F863FU335K310ALW0L KEMET	CAP FILM 3.3UF 10% 310VAC RADIAL	0
R413F1470JB00K KEMET	CAP FILM 4700PF 10% 1KVDC RADIAL	0
R76PF14704000J KEMET	CAP FILM 4700PF 5% 630VDC RADIAL	1766
MMK5473J63J01L16.5TR16 KEMET	CAP FILM 0.047UF 5% 63VDC RADIAL	2500
R73TI11504000J KEMET	CAP FILM 1500PF 5% 1.6KVDC RAD	1133
LDEEA1220KA0N00 KEMET	CAP FILM 2200PF 10% 100VDC 1206	0
R60EN4330AA30J KEMET	CAP FILM 3.3UF 5% 100VDC RAD	666
MMK5105K50J02L4BULK KEMET	CAP FILM 1UF 10% 50VDC RADIAL	5736
C4AQIBU4650M18J KEMET	CAP FILM 6.5UF 5% 800VDC RADIAL	88
R463I315050M1K KEMET	CAP FILM 0.15UF 10% 630VDC RAD	692

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.