Film Capacitors

Part Number	Description / PDF	Quantity
B32529C0273J000 TDK EPCOS	CAP FILM 0.027UF 5% 63VDC RADIAL	2617
B32521N8333K000 TDK EPCOS	CAP FILM 0.033UF 10% 630VDC RAD	0
B32529C1123J189 TDK EPCOS	CAP FILM 0.012UF 5% RADIAL	0
B32522C6474K TDK EPCOS	CAP FILM 0.47UF 10% 400VDC RAD	1153
B32922C3154M189 TDK EPCOS	CAP FILM 0.15UF 20% 630VDC RAD	23
B32923H3824M TDK EPCOS	CAP FILM 0.82UF 20% 630VDC RAD	1811
B32560J1225J000 TDK EPCOS	CAP FILM 2.2UF 5% 100VDC 2DIP	0
B32529C8333K000 TDK EPCOS	CAP FILM 0.033UF 10% 630VDC RAD	0
B32621A6392J289 TDK EPCOS	CAP FILM 3900PF 5% 630VDC RADIAL	4000
B32529D6563J289 TDK EPCOS	CAP FILM 0.056UF 5% 400VDC RAD	0
B32922C3684M000 TDK EPCOS	CAP FILM 0.68UF 20% 630VDC RAD	16868
B32529C0334J000 TDK EPCOS	CAP FILM 0.33UF 5% 63VDC RADIAL	5258
B32922C3334M000 TDK EPCOS	CAP FILM 0.33UF 20% 630VDC RAD	12715
B32022B3473M000 TDK EPCOS	CAP FILM 0.047UF 20% 1.5KVDC RAD	545
B32653A3334J000 TDK EPCOS	CAP FILM 0.33UF 5% 250VDC RADIAL	0
B32672Z5105K000 TDK EPCOS	CAP FILM 1UF 10% 520VDC RADIAL	975
B32924C3155M000 TDK EPCOS	CAP FILM 1.5UF 20% 630VDC RADIAL	1026
B32778J0207K000 TDK EPCOS	CAP FILM 200UF 10% 1.1KVDC 12DIP	225
B32620A4682K000 TDK EPCOS	CAP FILM 6800PF 10% 400VDC RAD	0
B32560J6223K000 TDK EPCOS	CAP FILM 0.022UF 10% 400VDC 2DIP	4432

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.