Film Capacitors

Part Number	Description / PDF	Quantity
B32529C0124J189 TDK EPCOS	CAP FILM 0.12UF 5% 63VDC RADIAL	0
B32023A3224M000 TDK EPCOS	CAP FILM 0.22UF 20% 1.5KVDC RAD	84
B32529C0333J289 TDK EPCOS	CAP FILM 0.033UF 5% 63VDC RADIAL	2035
B32621A3223J289 TDK EPCOS	CAP FILM 0.022UF 5% 250VDC RAD	0
B32524R0156K000 TDK EPCOS	CAP FILM 15UF 10% 63VDC RADIAL	0
B32676G1905K000 TDK EPCOS	CAP FILM 9UF 10% 750VDC RADIAL	1306
B32672L6154K189 TDK EPCOS	CAP FILM 0.15UF 10% 630VDC RAD	0
B32522N6224K289 TDK EPCOS	CAP FILM 0.22UF 10% 450VDC RAD	0
B32320I0706K000 TDK EPCOS	70MFD 1100V PP 50X95 PBT 5 PIN	0
B32678G4356K000 TDK EPCOS	CAP FILM 35UF 10% 450VDC RADIAL	92
B32529C1334K189 TDK EPCOS	CAP FILM 0.33UF 10% 100VDC RAD	1760
B32912A3333K000 TDK EPCOS	CAP FILM 0.033UF 10% 760VDC RAD	1073
B32529D3334J000 TDK EPCOS	CAP FILM 0.33UF 5% 250VDC RADIAL	0
B32653A2153K000 TDK EPCOS	CAP FILM 0.015UF 10% 2KVDC RAD	0
B32933B3474M000 TDK EPCOS	CAP FILM 0.47UF 20% 305VAC RAD	0
B32923D3334K000 TDK EPCOS	CAP FILM 0.33UF 10% 630VDC RAD	0
B32529C1222M289 TDK EPCOS	CAP FILM 2200PF 20% 100VDC RAD	12800
B32521C1105J000 TDK EPCOS	CAP FILM 1UF 5% 100VDC RADIAL	1
B32524Q6475K TDK EPCOS	CAP FILM 4.7UF 10% 400VDC RADIAL	1072
B32521E6104J000 TDK EPCOS	CAP FILM 0.1UF 5% 400VDC RADIAL	389

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.