Film Capacitors

Part Number	Description / PDF	Quantity
B32621A6333K189 TDK EPCOS	CAP FILM 0.033UF 10% 630VDC RAD	0
B32620A4103K289 TDK EPCOS	CAP FILM 10000PF 10% 400VDC RAD	7041
B32932A3473K000 TDK EPCOS	CAP FILM 0.047UF 10% 305VAC RAD	1692
B32522N6684J000 TDK EPCOS	CAP FILM 0.68UF 5% 450VDC RADIAL	2743
B32672L7223J000 TDK EPCOS	CAP FILM 0.022UF 5% 1.3KVDC RAD	0
B32529C6332J000 TDK EPCOS	CAP FILM 3300PF 5% 400VDC RADIAL	5276
B32373A5107J530 TDK EPCOS	CAP FILM 100UF 5% 1.35KVDC RAD	0
B32529C0153M289 TDK EPCOS	CAP FILM 0.015UF 20% 63VDC RAD	0
B32676G3206K000 TDK EPCOS	CAP FILM 20UF 10% 300VDC RADIAL	0
B32656S2474J561 TDK EPCOS	CAP FILM 0.47UF 5% 2KVDC SCREW	58
B32034A4474M000 TDK EPCOS	CAP FILM 0.47UF 20% 1KVDC RADIAL	677
B32674D3475K000 TDK EPCOS	CAP FILM 4.7UF 10% 300VDC RADIAL	1078
B32521C6103J TDK EPCOS	CAP FILM 10000PF 5% 400VDC RAD	914
B32529C8222J189 TDK EPCOS	CAP FILM 2200PF 5% 630VDC RADIAL	0
B32921C3473K000 TDK EPCOS	CAP FILM 0.047UF 10% 630VDC RAD	7552
B32522C0155K000 TDK EPCOS	CAP FILM 1.5UF 10% 63VDC RADIAL	0
B32524Q8474M000 TDK EPCOS	CAP FILM 0.47UF 20% 630VDC RAD	0
B32560J6682J000 TDK EPCOS	CAP FILM 6800PF 5% 400VDC 2DIP	0
B32653A1333J189 TDK EPCOS	CAP FILM 0.033UF 5% 1.6KVDC RAD	0
B32653A4334J189 TDK EPCOS	CAP FILM 0.33UF 5% 400VDC 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.