Film Capacitors

Part Number	Description / PDF	Quantity
C9TS5MD5460AARX KEMET	CAP FILM 46UF 415VAC RADIAL	4
R76PI31005050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
MMK5154J50J01L16.5TA18 KEMET	CAP FILM 0.15UF 5% 50VDC RADIAL	0
R76TF12205050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
R60EN42205030K KEMET	CAP FILM 2.2UF 10% 100VDC RADIAL	5
C4CAWUD3560AA3J KEMET	CAP FILM 0.56UF 5% 2KVDC AXIAL	0
R76MD2220SE30J KEMET	CAP FILM 0.022UF 5% 400VDC RAD	0
R76PW42204030J KEMET	CAP FILM 2.2UF 5% 630VDC RADIAL	653
R463R410000M1M KEMET	CAP FILM 1UF 20% 630VDC RADIAL	696
F861BG224K310A KEMET	CAP FILM 0.22UF 10% 310VAC RAD	1371
R82EC1150Z350J KEMET	CAP FILM 1500PF 5% 100VDC RAD	3717
R413I21000000M KEMET	CAP FILM 10000PF 20% 1KVDC RAD	0
PHE450MK4150JR05 KEMET	CAP FILM 1500PF 5% 630VDC RADIAL	994
PHE426HK4100JR05 KEMET	CAP FILM 1000PF 5% 250VDC RADIAL	0
C4AEJBW5200A3JJ KEMET	CAP FILM 20UF 5% 700VDC RADIAL	325
R82EC3100DQ70K KEMET	CAP FILM 0.1UF 10% 100VDC RADIAL	22259
R76PI239050H3J KEMET	CAP FILM 0.039UF 5% 630VDC RAD	858
R82MC2100CK50J KEMET	CAP FILM 10000PF 5% 400VDC RAD	299
LDEPD1470KA5N00 KEMET	CAP FILM 4700PF 10% 630VDC 2220	1459
SMP253MA4100MTR24 KEMET	CAP FILM 1000PF 20% 1.5KVDC SMD	589

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.