Film Capacitors

Part Number	Description / PDF	Quantity
PWS2102680KJ Nichicon	1000V, 0.068UF, 10 PERCENT, AXIA	0
EEC2E705HQA403 Nichicon	CAP FILM 7UF 250VAC QC TERM	91
QXK2G224KTPTZH Nichicon	CAP FILM 0.22UF 10% 400VDC RAD	174
QXK2J333JTP7FJ Nichicon	CAP FILM 0.033UF 5% 630VDC RAD	0
QAP2E685KRP Nichicon	CAP FILM 6.8UF 10% 250VDC AXIAL	84
QXK2G105KTPTZH Nichicon	CAP FILM 1UF 10% 400VDC RADIAL	182
PMB1854250KVR Nichicon	850V,2.5UF,10 PERCENT, LUG MOUNT	96
PMB2123330KSP Nichicon	1200V,0.33UF,10 PERCENT, LUG MOU	208
PMB1854150KVR Nichicon	850V,1.5UF,10 PERCENT, LUG MOUNT	96
QXL2B105KTPT Nichicon	CAP FILM 1UF 10% 125VAC RADIAL	150
QAP2E155KRP Nichicon	CAP FILM 1.5UF 10% 250VDC AXIAL	152
PMB2124150KVP Nichicon	1200V,1.5UF,10 PERCENT, LUG MOUN	96
QXP2J683KRPT Nichicon	CAP FILM 0.068UF 10% 630VDC RAD	764
PHC1405200KR Nichicon	400V, 20UF, 10 PERCENT, AXIAL SW	0
QXK2E335KTP7FT Nichicon	CAP FILM 3.3UF 10% 250VDC RAD	0
QXK2J223JTP7FJ Nichicon	CAP FILM 0.022UF 5% 630VDC RAD	0
PHB1603680KHS Nichicon	600V,0.68UF,10 PERCENT, RADIAL S	0
QYX1H563JTP Nichicon	CAP FILM 0.056UF 5% 50VDC RADIAL	70
PHC1604200KN Nichicon	600V, 2UF, 10 PERCENT, AXIAL SWI	0
QYX2A184JTP Nichicon	CAP FILM 0.18UF 5% 100VDC 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.