Film Capacitors

Part Number	Description / PDF	Quantity
B32614A4684J008 TDK EPCOS	CAP FILM 0.68UF 5% 400VDC RADIAL	0
B32653A8153K000 TDK EPCOS	CAP FILM 0.015UF 10% 2KVDC RAD	0
B32620A4333K289 TDK EPCOS	CAP FILM 0.033UF 10% 400VDC RAD	304
B32672L1682J000 TDK EPCOS	CAP FILM 6800PF 5% 1.6KVDC RAD	4413
B32933A3684K000 TDK EPCOS	CAP FILM 0.68UF 10% 305VAC RAD	11940
B32529C0155K189 TDK EPCOS	CAP FILM 1.5UF 10% 63VDC RADIAL	5500
B32620A6103J289 TDK EPCOS	CAP FILM 10000PF 5% 630VDC RAD	0
B32934B3105M000 TDK EPCOS	CAP FILM 1UF 20% 305VAC RADIAL	0
B32523Q106K289 TDK EPCOS	CAP FILM 10UF 10% 63VDC RADIAL	0
B32652A7223J000 TDK EPCOS	CAP FILM 0.022UF 5% 1.25KVDC RAD	4407
B32560J8103J289 TDK EPCOS	CAP FILM 10000PF 5% 630VDC 2DIP	0
B32652A7153J289 TDK EPCOS	CAP FILM 0.015UF 5% 1.25KVDC RAD	0
B25620B1947K102 TDK EPCOS	CAP FILM 940UF 10% 1.1KVDC RAD	0
B32774D4685K000 TDK EPCOS	CAP FILM 6.8UF 10% 450VDC RADIAL	0
B32613A4154J008 TDK EPCOS	CAP FILM 0.15UF 5% 400VDC RADIAL	0
B32672Z4684J000 TDK EPCOS	CAP FILM 0.68UF 5% 450VDC RADIAL	0
B32653A6154J000 TDK EPCOS	CAP FILM 0.15UF 5% 630VDC RADIAL	0
B32521C1105J289 TDK EPCOS	CAP FILM 1UF 5% 100VDC RADIAL	214
B32676E4156K000 TDK EPCOS	CAP FILM 15UF 10% 450VDC RADIAL	265
B32913B5104K TDK EPCOS	CAP FILM 0.1UF 10% 1KVDC 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.