Thin Film Capacitors

Image	Part Number	Description / PDF	Quantity
	0402YJ100FBWTR Elco (AVX)	CAP THIN FILM 10PF 16V 0402	0
	12101K470JBTTR Elco (AVX)	CAP THIN FILM 47PF 100V 1210	0
	12101K150GBTTR Elco (AVX)	CAP THIN FILM 15PF 100V 1210	0
	08055J4R3BBTTR Elco (AVX)	CAP THIN FILM 4.3PF 50V 0805	0
	06035J1R1CBTTR Elco (AVX)	CAP THIN FILM 1.1PF 50V 0603	0
$08055K180JBTTR\M$	08055K180JBTTR\M Elco (AVX)	CAP THIN FILM 18PF 50V 0805	0
	12101J0R8BBTTR Elco (AVX)	CAP THIN FILM 0.8PF 100V 1210	0
	C005YJR05PBSTR Elco (AVX)	CAP THIN FILM 0.05PF 16V 01005	4084
	0402ZJ2R4BBWTR Elco (AVX)	CAP THIN FILM 2.4PF 10V 0402	0
	08051K5R1CBTTR Elco (AVX)	CAP THIN FILM 5.1PF 100V 0805	0
	04023J0R9BBSTR Elco (AVX)	CAP THIN FILM 0.9PF 25V 0402	0
$04023J2R3BBWTR\500$	04023J2R3BBWTR\500 Elco (AVX)	CAP THIN FILM 2.3PF 25V 0402	0
	04023J0R6BBWTR Elco (AVX)	CAP THIN FILM 0.6PF 25V 0402	0
	04023J2R6BBWTR Elco (AVX)	CAP THIN FILM 2.6PF 25V 0402	0
	02013J1R3ABWTR Elco (AVX)	CAP THIN FILM 1.3PF 25V 0201	0
	0402ZJ3R0BBWTR Elco (AVX)	CAP THIN FILM 3PF 10V 0402	0
	04021J1R6PBSTR Elco (AVX)	CAP THIN FILM 1.6PF 100V 0402	232
	0402ZJ5R6BBWTR Elco (AVX)	CAP THIN FILM 5.6PF 10V 0402	0
	04021JR45ZBSTR Elco (AVX)	CAP THIN FILM 0.45PF 100V 0402	0
	08051J1R2ABTTR Elco (AVX)	CAP THIN FILM 1.2PF 100V 0805	0

Thin Film Capacitors

1. Overview

Thin Film Capacitors are passive electronic components formed by depositing metallic electrodes on dielectric polymer films through vacuum evaporation or sputtering processes. They exhibit excellent high-frequency performance, low equivalent series resistance (ESR), and superior stability under temperature variations. These capacitors play a critical role in modern electronics for decoupling, filtering, and energy storage applications due to their compact size, long lifespan, and high reliability.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Polyester (PET) Film Capacitors	Cost-effective, wide capacitance range (nF- F), stable up to 125 C	Consumer electronics, power supplies
Polypropylene (PP) Film Capacitors	High dielectric strength, low losses at high voltages	AC motor starters, renewable energy inverters
Polystyrene (PS) Film Capacitors	Precision capacitors with tight tolerance (<1%), excellent temperature stability	Medical imaging equipment, test instruments
Ceramic-Film Hybrid Capacitors	Combines ceramic's high permittivity with polymer's flexibility	5G base stations, aerospace electronics
Metallized Film Capacitors	Self-healing properties, reduced size through segmented electrodes	LED lighting ballasts, automotive DC-Link

3. Structure and Composition

Typical layered structure:

Electrode Layer: Aluminum or zinc alloys (50-200nm thickness) deposited via vacuum metallization
Dielectric Layer: Polymer films (PET/PP/PS) with thickness 0.6-10 m determining voltage rating
Barrier Layer: Silicon oxide coating for moisture protection
Termination: Solder-plated copper or silver epoxy for PCB mounting
Encapsulation: Epoxy resin or molded plastic housing

4. Key Technical Parameters

Parameter	Significance	Typical Range
Capacitance (C)	Determines charge storage capacity	100pF - 50 F
Voltage Rating (V)	Max operating voltage before dielectric breakdown	50V - 2000V
Temperature Coefficient	Capacitance drift with temperature (ppm/ C)	50 to 200ppm/ C
Dissipation Factor (DF)	Energy loss indicator (lower=more efficient)	0.0002 - 0.02
Insulation Resistance	Leakage current prevention capability	10^4 - 10^6 M
Operating Temperature	Environmental reliability range	-55 C to +150 C

5. Application Fields

Electronics: Switching power supplies, EMI filtering in smartphones
Automotive: Battery management systems for EVs, DC-Link capacitors in inverters
Industrial: Variable frequency drives for HVAC systems
Medical: MRI machine gradient coil drivers
Aerospace: Avionics power conditioning units

6. Leading Manufacturers and Products

Manufacturer	Country	Representative Product
TDK Corporation	Japan	C4532X5R1H106KK1270 (10 F, 50V, X5R)
KEMET Electronics	USA	C1117C103JRAC7800 (10nF, 1000V, PP film)
Vishay Intertechnology	USA	MK3250C103K1L2BA (250V, 10nF, automotive grade)
W rth Elektronik	Germany	860111470002 (1.1 F, 1200V, SiC inverter optimized)

7. Selection Guidelines

Calculate required capacitance and voltage derating (use 80% of rated voltage)
Match temperature coefficient with operating environment
For high-frequency applications: prioritize low DF and self-inductance
In harsh environments: select capacitors with reinforced encapsulation
Consider RoHS compliance and AEC-Q200 automotive certification

8. Industry Trends Analysis

Key development directions include:

High-frequency optimization for SiC/GaN power electronics (up to 10MHz switching)
Thermal-resistant films for automotive applications (operating temperature >175 C)
Embedded capacitor solutions for HDI PCBs with thickness <50 m
Low-halogen encapsulation materials meeting REACH standards
Smart capacitors with integrated temperature/voltage sensors