Film Capacitors

Part Number	Description / PDF	Quantity
ECH-U1H103GB5 Panasonic	CAP FILM 10000PF 2% 50VDC 1206	5381
ECH-U1H182GX5 Panasonic	CAP FILM 1800PF 2% 50VDC 0805	3674
ECW-FD2W225K4 Panasonic	CAP FILM 2.2UF 10% 450VDC RADIAL	19854
ECQ-E4225JFB Panasonic	CAP FILM 2.2UF 5% 400VDC RADIAL	0
ECQ-UBAF103K Panasonic	CAP FILM 0.01UF 10% 300VAC RADIA	0
ECH-U1H392JB5 Panasonic	CAP FILM 3900PF 5% 50VDC 1206	82551
ECW-H12152JV Panasonic	CAP FILM 1500PF 5% 1.25KVDC RAD	0
EZP-V1B206MTT Panasonic	CAP FILM 20UF 10% 1100V RADIAL	100
ECQ-UAAF223K Panasonic	CAP FILM 0.022UF 10% 275VAC RADI	1996
EZP-Q38955MTA Panasonic	CAP FILM 9.5UF 5% 380VAC RADIAL	100
ECQ-E2185JB Panasonic	CAP FILM 1.8UF 5% 250VDC RADIAL	852
ECQ-E6394KFB Panasonic	CAP FILM 0.39UF 10% 630VDC RAD	0
ECQ-UBAF333VG Panasonic	CAP FILM 0.033UF 20% 300VAC RADI	0
ECW-FE2W155P8 Panasonic	CAP FILM 1.5UF 5% 450VDC RADIAL	788
EZP-E50306MTA Panasonic	CAP FILM 30UF 10% 500VDC RADIAL	338
ECQ-E1335KFW Panasonic	CAP FILM 3.3UF 10% 100VDC RADIAL	0
ECQ-E2394KFW Panasonic	CAP FILM 0.39UF 10% 250VDC RAD	0
ECH-U1C103JB5 Panasonic	CAP FILM 10000PF 5% 16VDC 0805	2143
ECW-F2824JAQ Panasonic	CAP FILM 0.82UF 5% 250VDC RADIAL	670
ECW-FD2W395KC Panasonic	CAP FILM 3.9UF 10% 450VDC RADIAL	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.