Film Capacitors

Part Number	Description / PDF	Quantity
C4AQCEW6110A3AJ KEMET	CAP FILM 110UF 5% 650VDC RAD	54
R474N322050A1M KEMET	CAP FILM 0.22UF 20% 1KVDC RAD	982
R76QR347050H3J KEMET	CAP FILM 0.47UF 5% 1KVDC RADIAL	384
R82DC3120KT60J KEMET	CAP FILM 0.12UF 5% 63VDC RADIAL	3500
LDEEB2330JA0N00 KEMET	CAP FILM 0.033UF 5% 100VDC 1210	2101
R46KF233040P0M KEMET	CAP FILM 0.033UF 20% 560VDC RAD	6165
PHE845VY6220MR06L2 KEMET	CAP FILM 0.22UF 20% 1.5KVDC RAD	139
C44UUGT6250M84K KEMET	CAP FILM 250UF 10% 1.3KVDC RAD	25
R463N3680CKH1M KEMET	CAP FILM 0.68UF 20% 630VDC RAD	700
PHE844RF7100MR30L2 KEMET	CAP FILM 1UF 20% 1KVDC RADIAL	0
R60ER4680AA30K KEMET	CAP FILM 6.8UF 10% 100VDC RADIAL	814
R75UN239050H3J KEMET	CAP FILM 0.039UF 5% 2KVDC RADIAL	292
R82DC4150AA60J KEMET	CAP FILM 1.5UF 5% 63VDC RADIAL	771
PHE426KD7150JR06L2 KEMET	CAP FILM 1.5UF 5% 400VDC RAD	0
MMK5103K63J01L16.5TR18 KEMET	CAP FILM 10000PF 10% 63VDC RAD	4430
PHE820MB5330MR17 KEMET	CAP FILM 0.033UF 20% 275VAC RAD	206
R60DI43304030K KEMET	CAP FILM 3.3UF 10% 63VDC RADIAL	784
44APGP4800ZE0J KEMET	CAP FILM 8UF 5% 1.2KVDC RADIAL	95
R76MI32705050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
C4BSNBX4200ZALJ KEMET	CAP FILM 2UF 5% 1KVDC SCREW	246

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.