Film Capacitors

Part Number	Description / PDF	Quantity
ECW-HA3C102JB Panasonic	CAP FILM 1000PF 5% 1.6KVDC RAD	648
ECW-F2824RJA Panasonic	CAP FILM 0.82UF 5% 250VDC RADIAL	0
ECW-F6394JL Panasonic	CAP FILM 0.39UF 5% 630VDC RADIAL	2106
EZP-V1B256MTB Panasonic	CAP FILM 25UF 10% 1100V RADIAL	94
ECQ-UBAF223KA Panasonic	CAP FILM 0.022UF 10% 300VAC RADI	0
ECQ-E4273JF Panasonic	CAP FILM 0.027UF 5% 400VDC RAD	259
ECQ-E2225KF Panasonic	CAP FILM 2.2UF 10% 250VDC RADIAL	17963
ECQ-E2823JBB Panasonic	CAP FILM 0.082UF 5% 250VDC RAD	0
EZP-Q38905LTA Panasonic	CAP FILM 9UF 5% 380VAC RADIAL	98
ECQ-E2183RJF Panasonic	CAP FILM 0.018UF 5% 250VDC RAD	0
ECQ-E6822KF Panasonic	CAP FILM 8200PF 10% 630VDC RAD	0
ECQ-E1A474KF Panasonic	CAP FILM 0.47UF 10% 125VAC RAD	0
ECW-F2124JAQ Panasonic	CAP FILM 0.12UF 5% 250VDC RADIAL	1099
ECH-U1C333GX5 Panasonic	CAP FILM 0.033UF 2% 16VDC 1206	59659
ECW-U2152JC9 Panasonic	CAP FILM 1500PF 5% 250VDC 1913	4652
ECQ-UAAV824T1 Panasonic	CAP FILM 0.82UF 10% 310VAC RAD	600
ECW-F2W334JAQ Panasonic	CAP FILM 0.33UF 5% 450VDC RADIAL	398
ECW-U1683KC9 Panasonic	CAP FILM 0.068UF 10% 100VDC 1913	4030
ECW-HA3C473J4 Panasonic	CAP FILM 0.047UF 5% 1.6KVDC RAD	0
ECQ-U2A104ML Panasonic	CAP FILM 0.1UF 20% 275VAC RADIAL	207

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.