Film Capacitors

Part Number	Description / PDF	Quantity
B32653A1912K000 TDK EPCOS	CAP FILM 9100PF 10% 1.6KVDC RAD	0
B32672L8472K189 TDK EPCOS	CAP FILM 4700PF 10% 2KVDC RADIAL	0
B32520C1334K189 TDK EPCOS	CAP FILM 0.33UF 10% 100VDC RAD	1610
B32912A3683M189 TDK EPCOS	CAP FILM 0.068UF 20% 760VDC RAD	0
B32621A6103M000 TDK EPCOS	CAP FILM 10000PF 20% 630VDC RAD	0
B32652A4154J000 TDK EPCOS	CAP FILM 0.15UF 5% 400VDC RADIAL	6461
B32529C6223J TDK EPCOS	CAP FILM 0.022UF 5% 400VDC RAD	41
B32774D4106K000 TDK EPCOS	CAP FILM 10UF 10% 450VDC RADIAL	684
B32673Z4225K000 TDK EPCOS	CAP FILM 2.2UF 10% 450VDC RADIAL	0
B25620B1617K102 TDK EPCOS	CAP FILM 610UF 10% 1.1KVDC RAD	0
B32682A6222K000 TDK EPCOS	CAP FILM 2200PF 10% 630VDC RAD	1872
B32524Q3685J TDK EPCOS	CAP FILM 6.8UF 5% 250VDC RADIAL	0
B32522N6334K000 TDK EPCOS	CAP FILM 0.33UF 10% 450VDC RAD	0
B32523Q6684K189 TDK EPCOS	CAP FILM 0.68UF 10% 400VDC RAD	0
B32560J8332K000 TDK EPCOS	CAP FILM 3300PF 10% 630VDC 2DIP	0
B32672L8432J189 TDK EPCOS	CAP FILM 4300PF 5% 2KVDC RADIAL	0
B32653A7333K000 TDK EPCOS	CAP FILM 0.033UF 1.25KVDC RADIAL	1481
B32671L0332J189 TDK EPCOS	CAP FILM 3300PF 5% 1KVDC RADIAL	0
B32522C3474K289 TDK EPCOS	CAP FILM 0.47UF 10% 250VDC RAD	0
B32560J6223J000 TDK EPCOS	CAP FILM 0.022UF 5% 400VDC 2DIP	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.