Film Capacitors

Part Number	Description / PDF	Quantity
ECQ-E2125RJB Panasonic	CAP FILM 1.2UF 5% 250VDC RADIAL	0
ECQ-E4394JFW Panasonic	CAP FILM 0.39UF 5% 400VDC RADIAL	0
ECQ-E6684KZ Panasonic	CAP FILM 0.68UF 10% 630VDC RAD	644
ECW-FE2W155KA Panasonic	CAP FILM 1.5UF 10% 450VDC RADIAL	0
EZP-E50256LTA Panasonic	CAP FILM 25UF 10% 500VDC RADIAL	54
ECQ-UBAF473KA Panasonic	CAP FILM 0.047UF 10% 300VAC RADI	0
ECW-FE2W104QD Panasonic	CAP FILM 0.1UF 10% 450VDC RADIAL	990
ECW-FG2J155Q1 Panasonic	CAP FILM 1.5UF 10% 630VDC RADIAL	600
ECW-F4245JL Panasonic	CAP FILM 2.4UF 5% 400VDC RADIAL	969
ECW-F4333HL Panasonic	CAP FILM 0.033UF 3% 400VDC RAD	1956
ECQ-E2185RKB Panasonic	CAP FILM 1.8UF 10% 250VDC RADIAL	0
ECW-F2395JA Panasonic	CAP FILM 3.9UF 5% 250VDC RADIAL	1130
ECW-U2103JC9 Panasonic	CAP FILM 10000PF 5% 250VDC 1913	2055
ECH-U1H152GB5 Panasonic	CAP FILM 1500PF 2% 50VDC 0805	129
EZP-E52296MTB Panasonic	CAP FILM 29UF 15% 525VDC RADIAL	483
ECW-FD2J123JQ Panasonic	CAP FILM 0.012UF 5% 630VDC RAD	979
ECQ-E6154JF3 Panasonic	CAP FILM 0.15UF 5% 630VDC RADIAL	0
EZP-V60406MTS Panasonic	CAP FILM 40UF 10% 600V RADIAL	150
ECW-F6754HL Panasonic	CAP FILM 0.75UF 3% 630VDC RADIAL	608
ECQ-E2394RKF Panasonic	CAP FILM 0.39UF 10% 250VDC RAD	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.