Pehea e ʻike ai i ka polarity o ka mea SMT

Pehea e ʻike ai i ka polarity o ka mea SMT

Pono e uku nui ʻia i nā ʻāpana polarity i ke kaʻina hana PCBA holoʻokoʻa, no ka mea, ʻo nā ʻāpana orientation hewa e alakaʻi i nā ulia pōpilikia a me ka pau ʻole o ka holoʻokoʻa.Papa PCBA.No laila, he mea koʻikoʻi ka ʻenehana a i ʻole nā ​​​​mea hana hana e hoʻomaopopo i nā ʻāpana polarity SMT.

1. Ka wehewehe o ka polarity

ʻO ka polarity e pili ana i ka maikaʻi a me ka maikaʻi ʻole a i ʻole ka pine mua o ka ʻāpana, a ʻo ka maikaʻi a me ka maikaʻi ʻole a i ʻole ka pine mua o ka PCB ma ke ala like.Inā ʻaʻole kūlike ke kuhikuhi o ka ʻāpana a me ka papa PCB, ua kapa ʻia ʻo ia he ʻino ʻino.

2. Ke ala ʻike polarity

a.ʻAʻole polarity ka resistor Chip

b.Pehea e ʻike ai i ka polarity Capacitor

• Nonpolarity o ka capacitor seramika

• Loaʻa ka polarity i nā capacitors Tantalum.Ka hōʻailona maikaʻi ʻana o ka PCB a me nā ʻāpana: 1) hōʻailona kala kala;2) hōʻailona "+";3) hōʻailona diagonal

• He polarity ka electrolysis a me ka capacitance o ka alumini.ʻO ka hōʻailona ʻāpana: hōʻike ʻia ka ʻāpana kala i ka maikaʻi ʻole;ʻO ka māka PCB: ʻo ka hui kala a i ʻole "+" e hōʻike ana i ka maikaʻi.

3. Pehea e ʻike ai i ka polarity inductor

Ÿ ʻAʻohe koi polarity no ka pūʻolo puʻupuʻu puʻupuʻu a me ʻelua mau hopena wili.

Ÿ Loaʻa i nā inductors nui nā koi polarity.Hōʻailona ʻāpana: kiko / “1″ ke kiko polarity;ʻO ka māka PCB: kahi kiko / pōʻai / "*" e kū nei i kahi polarity.

4. Pehea e ʻike ai i ka polarity diode māmā

Ÿ He polarity ka LED i kau ʻia ma luna o SMT.Hōʻailona maikaʻi ʻole o ka ʻāpana: maikaʻi ʻole ka ʻōmaʻomaʻo;hōʻailona maikaʻi ʻole o ka PCB: 1) pā kū pololei, 2) pūʻulu kala, 3) kihi ʻoi o ka pale silika, 4) "匚" o ka pale kilika.

5. Pehea e ʻike ai i ka polarity diode

Ÿ SMT ili mauna diode he polarity.Lepili ʻino o ka ʻāpana: 1) pūʻulu kala, 2) ʻāwīwī, 3) waihoʻoluʻu i ke kaha ʻana (aniani);maikaʻi ʻole i ka mākaʻikaʻi ʻana o PCB: 1) pahu kū i ke kaha ʻana, 2) waihoʻoluʻu i ka kaha ʻana, 3) pale siliki kihi ʻoi, 4) "匚" i ka kaha ʻana.

6. Pehea e ʻike ai i ka polarity IC (Integrated Circuit).

Ÿ He polarity ke ʻano SOIC packaging.Hōʻike polarity: 1) pūʻulu kala, 2) hōʻailona, ​​3) concave point, groove, 4) bevel.

Ÿ SOP a i ʻole QFP ʻano pāpaʻi polarity.Hōʻike polarity: 1) concave / groove i ka kaha ʻana, 2) ʻokoʻa kekahi o nā helu mai nā helu ʻelua a ʻekolu paha (nui / ʻano).

Ÿ He polarity ka paʻi pepa ʻano QFN.Polarity i ka mākaʻikaʻi ʻana: 1) ʻokoʻa ka helu hoʻokahi mai nā helu ʻelua ʻē aʻe (ka nui / ʻano), 2) ka ʻaoʻao beveled i ka kaha ʻana, 3) ka hōʻailona i ke kaha ʻana (ka pae ʻākau, “+” , kiko)

7. Pehea e ʻike ai i ka polarity (BGA) Ball Grid Array

ʻāpana polarity: concave point / groove mark / Dot / circle to mark;PCB polarity: pōʻai / Dot /1 a i ʻole A / diagonal e hōʻailona ai.ʻO ka helu polarity o ka mea e pili ana i ka polarity point ma ka PCB.

(ʻO ka kikokikona o ke kiʻi mai ka hema a i ka ʻākau, a mai luna a lalo: ʻo ke kiko o nā mea e pili ana i ka paʻi pale PCB "1", ʻo ke kiko o nā mea e pili ana i ka paʻi pale PCB "1 a me A", ka pōʻai. ʻO ke kiko o nā ʻāpana e pili ana i ka polarity point o ka PCB, ʻo ka ʻaoʻao bevel o nā ʻāpana e like me ka PCB polarity point, ʻo ka pōʻai o nā ʻāpana e pili ana i ka polarity point o ka PCB, nā polarity polarity kūpono kūpono, polarity point matching. hewa, a huli ke kuhikuhi)

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