Film Capacitors

Part Number	Description / PDF	Quantity
B32520C0105M189 TDK EPCOS	CAP FILM 1UF 20% 63VDC RADIAL	0
B32521C6104K TDK EPCOS	CAP FILM 0.1UF 10% 400VDC RADIAL	672
B32671P5154K000 TDK EPCOS	CAP FILM 0.15UF 10% 520VDC RAD	3186
B32652A1722J000 TDK EPCOS	CAP FILM 7200PF 5% 1.6KVDC RAD	0
B32758G7556K000 TDK EPCOS	CAP FILM 55UF 10% 560VDC RADIAL	106
B32683A6154J000 TDK EPCOS	CAP FILM 0.15UF 5% 630VDC RADIAL	815
B32522C6334J TDK EPCOS	CAP FILM 0.33UF 5% 400VDC RADIAL	1000
B32911A3103K189 TDK EPCOS	CAP FILM 10000PF 10% 760VDC RAD	0
B32674D6335K000 TDK EPCOS	CAP FILM 3.3UF 10% 630VDC RADIAL	0
B32332I6356J082 TDK EPCOS	CAP FILM 35UF 5% 450VAC RADIAL	0
B32021A3562M000 TDK EPCOS	CAP FILM 5600PF 20% 1.5KVDC RAD	3566
B32641B6473J TDK EPCOS	CAP FILM 0.047UF 5% 630VDC RAD	0
B32560J3224J000 TDK EPCOS	CAP FILM 0.22UF 5% 250VDC 2DIP	0
B32933A3684K189 TDK EPCOS	CAP FILM 0.68UF 10% 305VAC RAD	231
B32922H3474K000 TDK EPCOS	CAP FILM 0.47UF 10% 630VDC RAD	0
B32620A6152K289 TDK EPCOS	CAP FILM 1500PF 10% 630VDC RAD	0
B32522C1334K000 TDK EPCOS	CAP FILM 0.33UF 10% 100VDC RAD	961
B32520C1224K289 TDK EPCOS	CAP FILM 0.22UF 10% 100VDC RAD	0
B32672L8822K000 TDK EPCOS	CAP FILM 8200PF 10% 2KVDC RADIAL	0
B32021A3332K289 TDK EPCOS	CAP FILM 3300PF 10% 300VAC RAD	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.