Film Capacitors

Part Number	Description / PDF	Quantity
ECH-U1C151JX5 Panasonic	CAP FILM 150PF 5% 16VDC 0603	2069
EZP-Q33805LTA Panasonic	CAP FILM 8UF 5% 330VAC RADIAL	138
ECQ-E4273KZ Panasonic	CAP FILM 0.027UF 10% 400VDC RAD	237
EZP-E50656MTA Panasonic	CAP FILM 65UF 10% 500VDC RADIAL	38
ECQ-E2393KF Panasonic	CAP FILM 0.039UF 10% 250VDC RAD	2184
ECW-U2473V16 Panasonic	CAP FILM 0.047UF 5% 250VDC 2416	0
ECH-U1H822GB5 Panasonic	CAP FILM 8200PF 2% 50VDC 1206	5570
ECW-FG60755JA Panasonic	CAP FILM 7.5UF 600VDC RADIAL	0
ECW-U4103V17 Panasonic	CAP FILM 10000PF 5% 400VDC 1913	45201
ECW-FD2W154JQ Panasonic	CAP FILM 0.15UF 5% 450VDC RADIAL	37
ECQ-E4124RKF Panasonic	CAP FILM 0.12UF 10% 400VDC RAD	0
EZP-E50906MTA Panasonic	CAP FILM 90UF 10% 500VDC RADIAL	34
EZP-V60606MTS Panasonic	CAP FILM 60UF 10% 600V RADIAL	50
ECQ-UAAF335MA Panasonic	CAP FILM 3.3UF 20% 275VAC RADIAL	167
ECQ-UAAF275KA Panasonic	CAP FILM 2.7UF 10% 275VAC RADIAL	0
ECW-FG70395JA Panasonic	CAP FILM 3.3UF 700VDC RADIAL	0
ECW-U2122V16 Panasonic	CAP FILM 1200PF 5% 250VDC 1913	2004
EZP-E1B306MTA Panasonic	CAP FILM 30UF 10% 1.1KVDC RADIAL	33
ECQ-E6225JFW Panasonic	CAP FILM 2.2UF 5% 630VDC RADIAL	0
ECQ-E2224JB Panasonic	CAP FILM 0.22UF 5% 250VDC RADIAL	305

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.