Film Capacitors

Part Number	Description / PDF	Quantity
B32520C0474J289 TDK EPCOS	CAP FILM 0.47UF 5% 63VDC RADIAL	0
BFC242011502 Vishay BC Components/Beyshlag/Draloric	CAP FILM 1500PF 2% 630VDC RADIAL	0
MKP386M422160JT7 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.22UF 5% 1.6KVDC SCREW	0
B32521C1334K000 TDK EPCOS	CAP FILM 0.33UF 10% 100VDC RAD	3385
B32653A6224K189 TDK EPCOS	CAP FILM 0.22UF 10% 630VDC RAD	0
R474W418050A1KV057 KEMET	CAP FILM 1.8UF 10% 1KVDC RADIAL	0
185473J63RAB-F Cornell Dubilier Electronics	CAP FILM 0.047UF 5% 63VDC RADIAL	0
ECW-U2182KC9 Panasonic	CAP FILM 1800PF 10% 250VDC 1913	0
SMDTF03100TB00MS00 WIMA	CAP FILM 0.1UF 20% 250VDC 2824	0
MLR333K50 NTE Electronics, Inc.	CAP FILM 0.033UF 10% 50VDC RAD	1244
MMK5223J100J01L4BULK KEMET	CAP FILM 0.022UF 5% 100VDC RAD	1999
PME271YD5470MR30 KEMET	CAP FILM 0.047UF 20% 1KVDC RAD	857
MKP1839051635G Vishay BC Components/Beyshlag/Draloric	CAP FILM 51PF 10% 630VDC AXIAL	0
ECW-FA2J474JB Panasonic	CAP FILM 0.47UF 5% 630VDC RADIAL	0
MMP6S15K-F Cornell Dubilier Electronics	CAP FILM 0.015UF 630VDC AXIAL	1379
184472J400RAB-F Cornell Dubilier Electronics	CAP FILM 4700PF 5% 400VDC RADIAL	0
ECQ-E2565KFB Panasonic	CAP FILM 5.6UF 10% 250VDC RADIAL	0
BFC2370GB103 Vishay BC Components/Beyshlag/Draloric	CAP FILM 1000PF 10% 630VDC RAD	0
BFC241646803 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.068UF 2% 63VDC RADIAL	630
BFC2370CC274 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.27UF 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.