Film Capacitors

Part Number	Description / PDF	Quantity
MLR155K630 NTE Electronics, Inc.	CAP FILM 1.5UF 10% 630VDC RADIAL	454
MLR103K630 NTE Electronics, Inc.	CAP FILM 10000PF 10% 630VDC RAD	1586
MLR222K630 NTE Electronics, Inc.	CAP FILM 2200PF 10% 630VDC RAD	83
MLR333K400 NTE Electronics, Inc.	CAP FILM 0.033UF 10% 400VDC RAD	6574
MRC440V40 NTE Electronics, Inc.	CAP FILM 40UF 6% 440VAC RADIAL	30
MLR683K100 NTE Electronics, Inc.	CAP FILM 0.068UF 10% 250VDC RAD	564
MRC440V30 NTE Electronics, Inc.	CAP FILM 30UF 6% 440VAC RADIAL	44
MRRC370V30 NTE Electronics, Inc.	CAP FILM 30UF 6% 370VAC RADIAL	159
MRC370V30 NTE Electronics, Inc.	CAP FILM 30UF 6% 370VAC RADIAL	32
MLR223K400 NTE Electronics, Inc.	CAP FILM 0.022UF 10% 400VDC RAD	5620
MLR564K100 NTE Electronics, Inc.	CAP FILM 0.56UF 10% 250VDC RAD	225
MRC370V12R5 NTE Electronics, Inc.	CAP FILM 12.5UF 6% 370VAC RADIAL	38
MLR274K250 NTE Electronics, Inc.	CAP FILM 0.27UF 10% 250VDC RAD	178
MLR473K250 NTE Electronics, Inc.	CAP FILM 0.047UF 10% 250VDC RAD	1699
MRRC370V15 NTE Electronics, Inc.	CAP FILM 15UF 6% 370VAC RADIAL	83
MLR472K100 NTE Electronics, Inc.	CAP FILM 4700PF 10% 100VDC RAD	2687
MRC370V3 NTE Electronics, Inc.	CAP FILM 3UF 6% 370VAC RADIAL	182
MRRC440V50 NTE Electronics, Inc.	CAP FILM 50UF 6% 440VAC RADIAL	24
MRRC370V20 NTE Electronics, Inc.	CAP FILM 20UF 6% 370VAC RADIAL	59
MRC440V3 NTE Electronics, Inc.	CAP FILM 3UF 6% 440VAC RADIAL	25

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.