Film Capacitors

Part Number	Description / PDF	Quantity
B32024B3474K000 TDK EPCOS	CAP FILM 0.47UF 10% 1.5KVDC RAD	398
B32922C3103M189 TDK EPCOS	CAP FILM 10000PF 20% 630VDC RAD	0
B32529C3103K189 TDK EPCOS	CAP FILM 10000PF 10% 250VDC RAD	1856
B32559C1224K000 TDK EPCOS	CAP FILM 0.22UF 10% 100VDC RAD	10059
B32676G4156K000 TDK EPCOS	CAP FILM 15UF 10% 450VDC RADIAL	700
B32778G8556K000 TDK EPCOS	CAP FILM 55UF 10% 800VDC RADIAL	92
B32520C1334J000 TDK EPCOS	CAP FILM 0.33UF 5% 100VDC RADIAL	7979
B32653A7104J189 TDK EPCOS	CAP FILM 0.1UF 5% 1.25KVDC RAD	0
B32653A0154K289 TDK EPCOS	CAP FILM 0.15UF 10% 1KVDC RADIAL	0
B32520C1105K000 TDK EPCOS	CAP FILM 1UF 10% 100VDC RADIAL	340
B32672L8123J189 TDK EPCOS	CAP FILM 0.012UF 5% 2KVDC RADIAL	0
B32652A6224J189 TDK EPCOS	CAP FILM 0.22UF 5% 630VDC RADIAL	0
B32373B4107J080 TDK EPCOS	CAP FILM 100UF 5% 1.2KVDC RADIAL	0
B32522E6154J000 TDK EPCOS	CAP FILM 0.15UF 5% 400VDC RADIAL	0
B32621A3333J289 TDK EPCOS	CAP FILM 0.033UF 5% 250VDC RAD	0
B32652A1222J000 TDK EPCOS	CAP FILM 2200PF 5% 1.6KVDC RAD	0
B32776E1146J000 TDK EPCOS	CAP FILM 14UF 5% 1.3KVDC RADIAL	0
B25690A0737K901 TDK EPCOS	CAP FILM 730UF 10% 900V RADIAL	60
B32656A0684K000 TDK EPCOS	CAP FILM 0.68UF 10% 1KVDC RADIAL	1
B32641B0183J TDK EPCOS	CAP FILM 0.018UF 5% 1KVDC RADIAL	915

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.