贴片元件基础知识

Radial Component(徑向插件)
Single In-line Package(單列式插件)
Dual In-line Package(雙列式插件)
Terminology(術語)
Surface Mount Component(表面帖裝元件)
Termination Component (端頭式引腳元件)
F = +/- 1% G = +/- 2% J = +/- 5% K = +/- 10% M = +/- 20% Z = +80/-20%
Through-Hole Axial & Radial
Crystal(石英晶體)
Use(用途): Crystals produce a consistent electrical pulse(產生 連續性電脈沖) Class letter (代號): Y or B Value Code(單位符號): (MHz) (兆赫)megahertz, (kHz) (千 赫)kilohertz Tolerance(誤差): None(無) Orientation(方向性): Angled corner or dot(三 角或圓點)) Polarity(極性): None(無)
Common Terms (常用術語)
Leads (元件腳)
Leads
Terminations 端頭腳件
Terminations
Terminology (術語)
Common Terms (常用術語)
Passive Component (無源器件) – Cannot amplify an electrical signal( 不能放大或轉變信號), such as resistor (電阻). Active Component (有源器件) – Can amplify or interpret a signal. Polarity (极性)= Positive(正极) ( Anode) & Negative(負极) (Cathode)
Reading Value for Capacitors(電容單位概述)
Capacitance(容值)
Pico farads = pF(皮法): The smallest unit of measurement(最小測 量單位) Nanofarads = nF(納法): The middle range unit of measurement(中 等測量單位) Microfarads = µF(微法):The largest unit of measurement(最大測量單位) pF nF µF
100,000,000 10,000,000 1,000,000 100,000 10,000 1,000 100 10 1 .1 = = = = = = = = = = 100,000 10,000 1,000 100 10 1 .1 .01 .001 .0001 = = = = = = = = = = 100 10 1 .1 .01 .001 .0001 .00001 .000001 .0000001
Anodommon Terms (常用術語)
Value (單位) – A numerical quantity given that component Tolerance(誤差) – The variation from the value allowed for that component. Orientation(有向性) = Position
Orientation
Through-Hole Axial & Radial
Diode(二極管)
Use (用途): Diodes are semiconductors that only allow(單向 導電) current to flow in one direction. Diodes are also called rectifiers. Class letter (代號): D or CR / V / 1N Value Code(單位符號): None Tolerance(誤差): None Orientation(方向性): By polarity(與极性有關) Polarity(极性): Colored ring or up to 3 rings to indicate cathode on component. Stripe, line, or arrow symbol, or Square pad indicate cathode on PCB
Through-Hole Axial & Radial
Light-Emitting Diode (LED)(發光二极管)
Use(用途): Emits light Class letter (代號): DS, E, LED, D, DIS, CR Value Code(單位): None Tolerance(誤差): None Orientation(方向性): By polarity(與极性有關) Polarity(极性): The following sign or marking indicate the cathode on component: Flat or shaved edge, A tab, Black or white dot, Shorter lead. Square pad or silkscreen on PCB indicate the cathode on PCB
Reading Numbered Capacitors
Capacitance is printed with a three-digit number. The first two digits are the value and the third digit is the multiplier. E.g. marked 107 means 100,000,000 pF or 100 µF(容值用三位數表示,前二位是 有效值,最後一位是指數) Tolerance Letter Code(誤差代號):
Through-Hole Axial & Radial
Inductor電感)
Use(用途): components and chokes. Class letter (代號): L; Transformer: T Value Code: Micro Henry (µH) or millihenry (mH). Value is either printed on the component or use color code. Tolerance(誤差): None Orientation方向性):By lead configuration(與構造有關) Polarity(极性): None Produces a magnetic field when electrical current flows through it. Related include transformer, toroids,
Through-Hole Axial & Radial
Capacitor (Polarized)(有極性電容)
Use(用途): Energy storage and discharges electricity Class letter (代號): C or “+” (By the lead) Value Code(單位): (µF) (微法) Microfarads, (nF)(納法) Nanofarads, (pF)(皮 法) Picrofarads – Printed on the capacitor body or color band. Tolerance(誤差): Printed on capacitor as percentage (e.g. +/-5%) or as letter scheme (e.g. K = +/-10%) Orientation(方向性): Square pad on PCB for positive lead (+) Polarity(極性): Plus (+): marks positive lead Dot ( ): marks positive lead Band: marks positive lead Arrows: arrows down the side lead to the negative end
Through-Hole Axial & Radial
Filter(濾波器)
Use(用途): Class letter (代號): Value Code(單位符號): Tolerance(誤差): Orientation (方向性): : Polarity(极性): Filter electrical noise in a circuit FL, Z None(無) None(無) By lead configuration None
Through-Hole Axial & Radial
Capacitor (Non-Polarized(無極性電容)
Use:(用途) Energy storage and discharges electricity(儲 存和釋放電荷) Class letter (代號): C (non-polarized)(無極性) Value Code(單位): (µF) (微法) Microfarads, (nF) )(納法) Nanofarads, (pF) (皮法) Picrofarads – Printed on the capacitor body. Tolerance(誤差): Printed on capacitor as percentage (e.g. +/5%) or as letter scheme (e.g. K = +/-10%) Orientation(方向性): None (無) Polarity(極性): None (無)