Film Capacitors

Part Number	Description / PDF	Quantity
EZP-E57126LTB Panasonic	CAP FILM 12UF 15% 575VDC RADIAL	737
ECQ-E2105JF3 Panasonic	CAP FILM 1UF 5% 250VDC RADIAL	0
EZP-Q38205LTA Panasonic	CAP FILM 2UF 5% 380VAC RADIAL	299
ECW-FE2J154KA Panasonic	CAP FILM 0.15UF 10% 630VDC RAD	0
ECW-FG60825J Panasonic	CAP FILM 8.2UF 600VDC RADIAL	0
ECQ-E2564KBB Panasonic	CAP FILM 0.56UF 10% 250VDC RAD	0
ECW-U2562V16 Panasonic	CAP FILM 5600PF 5% 250VDC 1913	16136
ECQ-E4824KFB Panasonic	CAP FILM 0.82UF 10% 400VDC RAD	0
ECW-FG60205JA Panasonic	CAP FILM 2UF 600VDC RADIAL	0
ECH-U1C471GX5 Panasonic	CAP FILM 470PF 2% 16VDC 0603	1754
ECH-U1H273GX5 Panasonic	CAP FILM 0.027UF 2% 50VDC 1210	0
ECW-FD2J275K Panasonic	CAP FILM 2.7UF 10% 630VDC RADIAL	200
ECW-FD2W474K Panasonic	CAP FILM 0.47UF 10% 450VDC RAD	0
ECW-U2183V16 Panasonic	CAP FILM 0.018UF 5% 250VDC 1913	65
ECH-U1H123JX5 Panasonic	CAP FILM 0.012UF 5% 50VDC 1210	4183
ECQ-E6823KFB Panasonic	CAP FILM 0.082UF 10% 630VDC RAD	0
ECW-F2W154JAQ Panasonic	CAP FILM 0.15UF 5% 450VDC RADIAL	0
ECQ-UBAF472M Panasonic	CAP FILM 0.0047UF 20% 300VAC RAD	1967
ECQ-UAAF475S1 Panasonic	CAP FILM 4.7UF 20% 275VAC RAD	197
ECH-U1H223GX5 Panasonic	CAP FILM 0.022UF 2% 50VDC 1210	6351

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.