Film Capacitors

Part Number	Description / PDF	Quantity
R76PI23304030J KEMET	CAP FILM 0.033UF 5% 630VDC RAD	1172
R46KI322040L2M KEMET	CAP FILM 0.22UF 20% 560VDC RAD	506
PHE426MA5220JR05 KEMET	CAP FILM 0.022UF 5% 630VDC RAD	881
F861DY275K310ZLH0J KEMET	CAP FILM 2.7UF 10% 310VAC RADIAL	1622
R79IC3150AA40J KEMET	CAP FILM 0.15UF 5% 250VDC RADIAL	1402
R413R368050T0K KEMET	CAP FILM 0.68UF 10% 1.5KVDC RAD	31
R75GF310050H3J KEMET	CAP FILM 0.1UF 5% 160VDC RADIAL	1630
C44PMGR5800RASJ KEMET	CAP FILM 80UF 5% 1.1KVDC RADIAL	9
R49AI31500001M KEMET	CAP FILM 0.15UF 20% 800VDC RAD	7
R46KF3100CKP0K KEMET	CAP FILM 0.1UF 10% 560VDC RADIAL	1055
C274AC35200AA0J KEMET	CAP FILM 20UF 5% 470VAC RADIAL	0
C44UQGT6560M51K KEMET	CAP FILM 560UF 10% 1.1KVDC RAD	7
R46KI2100DQ01K KEMET	CAP FILM 10000PF 10% 560VDC RAD	800
R475R41005001K KEMET	CAP FILM 1UF 10% 1KVDC RADIAL	40
R82EC2150Z350K KEMET	CAP FILM 0.015UF 10% 100VDC RAD	4000
LDECB3100MA0N00 KEMET	CAP FILM 0.1UF 20% 50VDC 1210	0
SMC5.7473J50J33TR12 KEMET	CAP FILM 0.047UF 5% 50VDC 2220	730
C4AQILU4270A11J KEMET	CAP FILM 2.7UF 5% 800VDC RADIAL	188
R60IR44705040K KEMET	CAP FILM 4.7UF 10% 250VDC RADIAL	129
SMC5.7682J50J33TR12 KEMET	CAP FILM 6800PF 5% 50VDC 2220	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.