Yuav ua li cas txheeb xyuas SMT tivthaiv polarity

Yuav ua li cas txheeb xyuas SMT tivthaiv polarity

Kev saib xyuas tshwj xeeb yuav tsum tau them rau cov polarity Cheebtsam nyob rau hauv tag nrho cov txheej txheem PCBA, vim hais tias cov kev taw qhia tsis ncaj ncees lawm yuav ua rau batch teeb meem thiab tsis ua hauj lwm ntawm tag nrho.PCBA pawg thawj coj saib.Yog li, nws yog ib qho tseem ceeb heev uas engineering lossis cov neeg ua haujlwm tsim khoom kom nkag siab txog SMT polarity Cheebtsam.

1. Kev txhais ntawm polarity

Polarity hais txog qhov zoo thiab qhov tsis zoo lossis thawj tus pin ntawm cov khoom, thiab qhov zoo thiab qhov tsis zoo lossis thawj tus pin ntawm PCB yog nyob rau hauv tib txoj kev.Yog hais tias cov kev taw qhia ntawm cov khoom thiab cov PCB board tsis sib haum, nws yog hu ua rov qab phem.

2. Txoj kev txheeb xyuas polarity

a.Chip resistor muaj nonpolarity

b.Yuav ua li cas txheeb xyuas Capacitor polarity

• Nonpolarity ntawm ceramic capacitor

• Tantalum capacitors muaj polarity.Kev cim zoo ntawm PCB thiab cov khoom siv: 1) xim band npav;2) "+" kos npe;3) kab pheeb ces kaum

• Lub electrolysis thiab capacitance ntawm txhuas muaj polarity.Cov cim cim: xim band sawv cev tsis zoo;PCB cim: xim band lossis "+" sawv cev zoo.

3. Yuav ua li cas txheeb xyuas inductor polarity

Ÿ Tsis muaj qhov yuav tsum tau muaj polarity rau pob chip coil thiab lwm yam ob qhov kawg vuam.

Ÿ Ntau tus pin inductors muaj qhov xav tau polarity.Cov cim cim: dot / "1" sawv cev rau polarity point;PCB cim: dot / voj voog / "*" stands rau polarity point.

4. Yuav ua li cas txheeb xyuas lub teeb emitting diode polarity

Ÿ SMT nto mounted LED muaj polarity.Cov cim tsis zoo ntawm cov khoom siv: ntsuab yog qhov tsis zoo;Cov cim tsis zoo ntawm PCB: 1) ntsug bar, 2) xim band, 3) ntse ces kaum ntawm silk screen, 4) "匚" ntawm silk screen.

5. Yuav ua li cas txheeb xyuas diode polarity

Ÿ SMT nto mount diode muaj polarity.Cov ntawv tsis zoo ntawm cov khoom siv: 1) xim band, 2) zawj, 3) xim rau kos (iav);Tsis zoo rau kev kos npe ntawm PCB: 1) ntsug bar rau npav, 2) xim rau kev kos, 3) silk screen ntse ces kaum, 4) "匚" rau kev kos

6. Yuav ua li cas txheeb xyuas IC (Integrated Circuit) polarity

Ÿ SOIC hom ntim muaj polarity.Polarity qhia: 1) xim band, 2) cim, 3) concave point, zawj, 4) bevel.

Ÿ SOP lossis QFP hom ntim muaj polarity.Polarity indications: 1) concave / zawj rau cov cim, 2) ib qho ntawm cov ntsiab lus sib txawv ntawm ob lossis peb lub ntsiab lus (qhov loj / duab).

Ÿ QFN hom ntim muaj polarity.Polarity rau kev kos: 1) ib qho taw qhia txawv ntawm ob lub ntsiab lus (qhov loj / duab), 2) beveled ntug rau kev kos, 3) cim rau kev kos ( kab rov tav bar, "+", dot)

7. Yuav ua li cas txheeb xyuas (BGA)Pob Grid Array polarity

tivthaiv polarity: concave point / zawj cim / Dot / voj voog rau kos;PCB polarity: lub voj voog / Dot / 1 lossis A / kab pheeb ces kaum los cim.Lub ntsiab lus polarity ntawm cov khoom sib txuas mus rau polarity point ntawm PCB.

(Cov ntawv nyeem ntawm daim duab yog los ntawm sab laug mus rau sab xis, thiab los ntawm sab saum toj mus rau hauv qab: cov ntsiab lus ntawm cov khoom sib raug rau PCB npo luam ntawv "1", cov teev ntawm cov khoom sib raug rau PCB npo luam ntawv "1 thiab A", lub voj voog Lub ntsiab lus ntawm cov khoom sib raug rau lub polarity point ntawm PCB, bevel ntug ntawm cov khoom sib raug rau PCB polarity point, lub voj voog ntawm cov khoom sib raug rau lub polarity point ntawm PCB, cov ntsiab lus polarity match kom raug, polarity point matching. yuam kev, thiab cov kev taw qhia yog thim rov qab)

PCBFuture tuaj yeem muab cov ntawv luam tawm zoo tshaj plaws thiabprinted circuit board sib dhosntawm tus nqi qis heev, kev pabcuam zoo thiab xa khoom raws sijhawm.Ib pab neeg nrog ntau tshaj 2 xyoo caum ntawm kev paub tau tsim lub koob npe nrov rau kev xa khoom zoo thiab kev pabcuam raws sijhawm.Yog tias koj muaj lus nug, thov hu rausales@pcbfuture.comywj siab.