Film Capacitors

Part Number	Description / PDF	Quantity
B32671L6473K289 TDK EPCOS	CAP FILM 0.047UF 10% 630VDC RAD	0
B32621A0472K189 TDK EPCOS	CAP FILM 4700PF 10% 1KVDC RADIAL	0
B32926H3475K000 TDK EPCOS	CAP FILM 4.7UF 10% 630VDC RADIAL	0
B32362A4806J080 TDK EPCOS	CAP FILM 80UF 5% 480VAC RADIAL	0
B32652A7682J000 TDK EPCOS	CAP FILM 6800PF 5% 1.25KVDC RAD	0
B32672Z5334J000 TDK EPCOS	CAP FILM 0.33UF 5% 520VDC RADIAL	0
B32914A3105M189 TDK EPCOS	CAP FILM 1UF 20% 760VDC RADIAL	239
B32924A4824M000 TDK EPCOS	CAP FILM 0.82UF 20% 650VDC RAD	392
B32674F3106K000 TDK EPCOS	CAP FILM 10UF 10% 450VDC RADIAL	0
B32520C6822J TDK EPCOS	CAP FILM 8200PF 5% 400VDC RADIAL	0
B32774D0205J000 TDK EPCOS	CAP FILM 2UF 5% 1.1KVDC RADIAL	0
B81123C1152M289 TDK EPCOS	CAP FILM 1500PF 20% 500VAC RAD	0
B32521C1224J289 TDK EPCOS	CAP FILM 0.22UF 5% 100VDC RADIAL	0
B32370A3406J030 TDK EPCOS	CAP FILM 40UF 5% 900VDC RADIAL	0
B32529D3224J000 TDK EPCOS	CAP FILM 0.22UF 5% 250VDC RADIAL	2643
B32674D3335K000 TDK EPCOS	CAP FILM 3.3UF 10% 300VDC RADIAL	1063
B32653A2102K189 TDK EPCOS	CAP FILM 1000PF 10% 2KVDC RADIAL	0
B32529C6822J000 TDK EPCOS	CAP FILM 8200PF 5% 400VDC RADIAL	0
B32653A4474K189 TDK EPCOS	CAP FILM 0.47UF 10% 400VDC RAD	0
B32523Q3155J000 TDK EPCOS	CAP FILM 1.5UF 5% 250VDC 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.