Film Capacitors

Image Part Number Description / PDF Quantity Rfq
ECW-FD2W275J

ECW-FD2W275J

Panasonic

CAP FILM 2.7UF 5% 450VDC RADIAL

3160

ECQ-E1684KF3

ECQ-E1684KF3

Panasonic

CAP FILM 0.68UF 10% 100VDC RAD

0

ECH-U1C152GX5

ECH-U1C152GX5

Panasonic

CAP FILM 1500PF 2% 16VDC 0603

3903

ECQ-UAAF475K

ECQ-UAAF475K

Panasonic

CAP FILM 4.7UF 10% 275VAC RADIAL

230

ECQ-E12333KF

ECQ-E12333KF

Panasonic

CAP FILM 0.033UF 1.25KVDC RADIAL

0

ECQ-E2273JFB

ECQ-E2273JFB

Panasonic

CAP FILM 0.027UF 5% 250VDC RAD

0

ECW-FG70205JA

ECW-FG70205JA

Panasonic

CAP FILM 2.0UF 700VDC RADIAL

0

ECQ-UBAF223VH

ECQ-UBAF223VH

Panasonic

CAP FILM 0.022UF 10% 300VAC RADI

0

ECQ-E2274JF

ECQ-E2274JF

Panasonic

CAP FILM 0.27UF 5% 250VDC RADIAL

573

EZP-V60356MTB

EZP-V60356MTB

Panasonic

CAP FILM 35UF 10% 600V RADIAL

150

ECQ-E4154RJF

ECQ-E4154RJF

Panasonic

CAP FILM 0.15UF 5% 400VDC RADIAL

0

ECW-F4165JL

ECW-F4165JL

Panasonic

CAP FILM 1.6UF 5% 400VDC RADIAL

201

ECQ-E2154JBB

ECQ-E2154JBB

Panasonic

CAP FILM 0.15UF 5% 250VDC RADIAL

0

ECQ-E2475JF

ECQ-E2475JF

Panasonic

CAP FILM 4.7UF 5% 250VDC RADIAL

555

ECW-F4623HL

ECW-F4623HL

Panasonic

CAP FILM 0.062UF 3% 400VDC RAD

152

ECH-U1H151JB5

ECH-U1H151JB5

Panasonic

CAP FILM 150PF 5% 50VDC 0805

3911

ECW-U2683KC9

ECW-U2683KC9

Panasonic

CAP FILM 0.068UF 10% 250VDC 2416

0

ECQ-E2473KB3

ECQ-E2473KB3

Panasonic

CAP FILM 0.047UF 10% 250VDC RAD

0

ECQ-E1475JFA

ECQ-E1475JFA

Panasonic

CAP FILM 4.7UF 5% 100VDC RADIAL

0

ECQ-E2125RKB

ECQ-E2125RKB

Panasonic

CAP FILM 1.2UF 10% 250VDC 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:

  1. Determine required capacitance and voltage ratings with safety margins
  2. Assess environmental conditions (temperature, humidity, vibration)
  3. Evaluate dielectric absorption and frequency response requirements
  4. Consider packaging constraints (through-hole vs. surface-mount)
  5. 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.

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