Film Capacitors

Part Number	Description / PDF	Quantity
ECW-H12183JV Panasonic	CAP FILM 0.018UF 5% 1.25KVDC RAD	163
ECW-FG1B305J Panasonic	CAP FILM 3UF 5% 1.1KVDC RADIAL	90
ECQ-U2A822MV Panasonic	CAP FILM 8200PF 20% 250VAC RAD	24
ECW-FE2W154Q5 Panasonic	CAP FILM 0.15UF 10% 450VDC RAD	1000
ECW-FD2J473KQ Panasonic	CAP FILM 0.047UF 10% 630VDC RAD	553
ECH-U1H821JB5 Panasonic	CAP FILM 820PF 5% 50VDC 0805	71693
ECW-H16473JV Panasonic	CAP FILM 0.047UF 5% 1.6KVDC RAD	111
ECW-FD2W224KB Panasonic	CAP FILM 0.22UF 10% 450VDC RAD	0
ECW-FD2J333KQ Panasonic	CAP FILM 0.033UF 10% 630VDC RAD	997
ECQ-E2333KFW Panasonic	CAP FILM 0.033UF 10% 250VDC RAD	0
EZP-V60306MTB Panasonic	CAP FILM 30UF 10% 600V RADIAL	150
ECQ-E2W154KC Panasonic	CAP FILM 0.15UF 10% 450VDC RAD	8071
ECW-U2332V16 Panasonic	CAP FILM 3300PF 5% 250VDC 1913	10608
ECQ-E4225JFW Panasonic	CAP FILM 2.2UF 5% 400VDC RADIAL	0
ECW-F2475HAB Panasonic	CAP FILM 4.7UF 3% 250VDC RADIAL	0
ECQ-U2A105ML Panasonic	CAP FILM 1UF 20% 275VAC RADIAL	0
ECQ-E4274JF Panasonic	CAP FILM 0.27UF 5% 400VDC RADIAL	54
ECQ-E4125JF Panasonic	CAP FILM 1.2UF 5% 400VDC RADIAL	987
ECQ-UAAF106MA Panasonic	CAP FILM 10.0UF 20% 275VAC RADIA	0
ECQ-UAAV684TA Panasonic	CAP FILM 0.68UF 10% 310VAC 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.