Ndimagwira ntchito pa terminal block specification ndi support ku J-GUANG, ndipo ndimathera nthawi yanga yambiri ndikuyankha mafunso a kapangidwe ka PCB kuchokera kwa mainjiniya opanga mapangidwe kuphatikiza block yathu ya 301-5.0 screw terminal mu ma power distribution boards. Mafunso omwe ndikufunsani sakunena za terminal block specifications okha — amenewo ali pa datasheet. Amanena za kuphatikizana kwa makina: momwe ma blocks oyandikana angagwirire pafupi, kukula kwa drill komwe kumapereka kudalirika kwa solder joint, ndi zomwe zimachitika ku nyumba ya PA66 ikadutsa mu bafa ya solder ya 260°C kwa masekondi 8. Nkhaniyi ikusonkhanitsa mayankho omwe ndapeza kuchokera ku mayeso 12 a qualification qualification omwe tidachita pakati pa 2023 ndi 2025.

Kukula kwa Mapazi a PCB: Zimene Datasheet Imasonyeza Mosiyana ndi Zimene Zimagwira Ntchito Popanga

301-5.0 imagwiritsa ntchito pitch ya 5.0 mm, yomwe ndi yokhazikika pa kalasi iyi ya chipika chotsirizira. Miyeso ya pini ndi 1.0 x 1.2 mm mkuwa wozungulira wokhala ndi tin plating. Kukula kwa dzenje la PCB komwe kumalimbikitsidwa ndi 1.3-1.5 mm m'mimba mwake - m'lifupi mokwanira kuti piniyo izikakamira pakati panthawi yosokera mafunde koma yolimba mokwanira kuti zitsimikizire kuti capillary action ikukoka solder kudzera mu dzenjelo. Mu kuyesa kwathu kodalirika kwa solder joint pa zitsanzo 500, mabowo pa 1.4 mm adapanga mphamvu yayikulu kwambiri yokoka pa 35 N yokhala ndi osachepera 28 N. Mabowo pa 1.6 mm adachepetsa mphamvu yokoka yapakati kufika pa 29 N chifukwa mpata wa capillary unali waukulu kwambiri kuti solder ikwaniritsidwe nthawi zonse.

Chinthu chimodzi chomwe sichili mu deta koma chofunikira pakupanga: kutseguka kwa pin-to-hole kumasintha ndi makulidwe a PCB. Pa bolodi la FR-4 la 1.6 mm, dzenje la 1.4 mm lokhala ndi pin ya 1.2 mm limapereka kutseguka kwa diametral ya 0.2 mm, zomwe ndi zabwino kwambiri. Pa bolodi la 2.4 mm la ntchito zamagetsi amphamvu, kutseguka komweko kumagwirabe ntchito koma nthawi yokhalapo ya wave solder iyenera kuwonjezeka kuchokera pa masekondi atatu mpaka masekondi asanu kuti zitsimikizire kuti dzenje lidzadzaza mokwanira. Tili ndi magawo ofunikira a wave solder malinga ndi makulidwe a bolodi omwe ndimatumiza kwa kasitomala aliyense woyamba.

Kutsegula kwa Makina Ozungulira Malo Oyimilira pa PCB

Chipilala cha 301-5.0 chili ndi kutalika kwa 10.0 mm kuchokera pamwamba pa PCB mpaka pamwamba pa nyumbayo. Skurufu yolumikizira imafuna kuti screwdriver ifike pamwamba, ndipo malo olumikizira screw amakhala mkati mwa 2.5 mm m'nyumba. Pa mawaya amanja, izi zikutanthauza kuti pakhale malo osachepera 15 mm pamwamba pa PCB kuti pakhale screwdriver yokhazikika ya 3.0 mm yokhala ndi tsamba lathyathyathya pa ngodya ya madigiri 15. Pa screwdriver yokha yomwe ikuchitika, kufunikira kwa screwdriver kumawonjezeka kufika pa 20 mm kuti pakhale chogwirira screwdriver.

Pakati pa malo ozungulira omwe ali pafupi, ndikupangira kuti pakhale malo ocheperako a 2.0 mm kuchokera m'mphepete mwa nyumba kupita ku gawo lotsatira. Nyumbayo ndi 8.5 mm mulifupi pa malo aliwonse a ndodo, kotero ndi malo otsetsereka a 5.0 mm, kusiyana pakati pa makoma a nyumba yoyandikana ndi 8.5 - 5.0 = 3.5 mm. Mpata wa 3.5 mm ndi wokwanira m'malo ambiri opangira zinthu, koma ngati bolodi lidutsa mu coating conformal, nozzle yopangira coating nthawi zambiri imafuna malo otsetsereka a 5.0 mm. Tinali ndi kasitomala m'modzi yemwe adapeza kuti loboti yawo yosankha coating inali kugunda makoma a nyumbayo pa mtunda wa 3.5 mm - adasinthira ku malo ena onse kuti apange 10 mm pitch pa coating pass kenako n'kuyika malo omwe adadumpha.

Kudalirika kwa Solder Joint: Magawo a Wave Solder ndi Deta Yoyesera Kokani

Chipinda cha 301-5.0 chapangidwa kuchokera ku PA66 chokhala ndi UL94 V-0 rating, ndipo chapangidwa kuti chizitha kupirira kusungunuka kwa mafunde. Mbiri yathu yovomerezeka ya mafunde: itenthetseni 100-120°C kwa masekondi 60-90, kutentha kwa pamwamba pa mafunde 255-260°C, nthawi yokhazikika masekondi 3-5 pa bolodi la 1.6 mm ndi masekondi 5-7 pa bolodi la 2.4 mm. Tinayesa zitsanzo 500 kudzera mu mbiri iyi mu 2024 popanda kusintha kulikonse kwa nyumba.

Mayeso a kukoka kwa solder joint ndi njira ya QC yomwe timalimbikitsa kuti titsimikizire mzere wopangira. Timagwiritsa ntchito mphamvu yoyezera yokhala ndi chogwirira chomwe chimakoka molunjika pa thupi la block ya terminal pambuyo pokoka. Deta yathu kuchokera ku zitsanzo 500: mphamvu yokoka yapakati 35 N, osachepera 28 N, kupotoka kokhazikika 3.2 N. Pakupanga, ndikupangira cholinga cha Cpk cha 1.33 chokhala ndi malire ochepera a 25 N - kutanthauza kuti palibe cholumikizira chimodzi choposa chimodzi mu 4,000 chomwe chiyenera kulephera pansi pa mphamvu yokoka ya 25 N. Chinthu chachikulu chomwe chimakankhira mphamvu yokoka pansi pa 25 N ndi kuchuluka kosakwanira kwa solder, komwe tidapeza chifukwa cha zifukwa ziwiri zazikulu: m'mimba mwake wa dzenje la PCB kupitirira 1.55 mm, ndi kuchuluka kwa kugwiritsa ntchito kwa wave solder flux komwe kumatsika pansi pa 0.3 mL pa bolodi lililonse chifukwa cha ma nozzles otsekedwa.

Kusamalira Kutentha: Mphamvu Yapano Pa Kutentha Kwambiri Komwe Kuli

Mphamvu yamagetsi ya 301-5.0 ya 16A yomwe ili ndi 301-5.0 ili pa 25°C ndipo ma pole onse amadzazidwa nthawi imodzi. Kuchepa kwa mphamvu yamagetsi kumayamba pa 40°C ambient: tinayesa kuchepetsa mphamvu yamagetsi yopitilira ndi 4% pa 10°C pamwamba pa 40°C kudzera mu mayeso oyesera kutentha mkati mwa nyumba. Pa 70°C ambient, mphamvu yamagetsi yopitilira imatsika kufika pa 14.0A. Cholepheretsa si pini yamkuwa kapena cholumikizira cha screw - ndi kutentha komwe kumapangidwa pa waya-ku-pin interface, komwe kuli ndi kukana kolumikizana kwa 2.0-3.5 mOhm pa pole iliyonse mu kuyesa kwathu kopanga. Pa 16A, pole iliyonse imataya pafupifupi 0.45 W. Mu block ya 12-pole yodzaza mokwanira pa 16A pa pole iliyonse, kutayika konse kwa kutentha ndi 5.4 W yokhazikika m'dera la 60 x 10 mm pa PCB. Popanda kutentha kokwanira kwa mkuwa, kutentha kwa PCB pansi pa terminal block kumatha kukwera ndi 25-35°C pamwamba pa mlengalenga.

Yankho lake ndi losavuta: Lumikizani ma pad olowera m'bowo ku malo osachepera 50 mm² a mkuwa pa mtengo uliwonse pa PCB, pogwiritsa ntchito 35 µm kapena mkuwa wolemera. Chipika cha 12-pole chokhala ndi pole iliyonse yolumikizidwa ku mkuwa wa 50 mm² chikuwonetsa kukwera kwa kutentha kwa PCB kwa 12°C yokha pa 16A yopitirira, poyerekeza ndi 30°C popanda kulumikizana kwa mkuwa.

Kuyesa Kwambiri Pambuyo Pokhazikitsa: Kodi Kutanthauza Chiyani kwa AC 2000V Pakupanga?

301-5.0 imatchulidwa ndi mphamvu yamagetsi ya AC 2000V pamphindi imodzi pakati pa mipiringidzo yoyandikana. Iyi ndi njira yoyesera pa bolodi lokha, osati pa PCB yosonkhanitsidwa. Bolodi likasonkhanitsidwa pa bolodi, mayeso a poto lalikulu ayenera kuwerengera zinthu za PCB (FR-4 nthawi zambiri imagwirira ntchito 40 kV/mm, kotero 1.6 mm imapereka mphamvu ya dielectric ya 64 kV), mbiri ya solder joint, ndi zotsalira zilizonse za flux pamwamba pa bolodi. Monga momwe taonera, kulephera pakupanga mayeso a poto lalikulu pa 1,500V AC nthawi zambiri kumachitika chifukwa cha flux residue pakati pa zolumikizira za pin solder zoyandikana, osati ndi terminal block yokha. Tikukulimbikitsani kusankha flux yosayera yokhala ndi kukana kwa insulation pamwamba kwa osachepera 10¹¹ Ohm pa 85°C ndi 85% chinyezi pa IPC J-STD-001, ndipo imafuna kuyang'aniridwa kowoneka bwino kwa malo a inter-pin musanayesedwe poto lalikulu.

Pa ntchito zomwe zimafuna kutenthetsa kwambiri — monga magetsi azachipatala malinga ndi IEC 60601 — pitch ya 5.0 mm imapereka mtunda wa 4.0 mm pakati pa mitengo yoyandikana (m'mphepete mwa pitch kupita ku m'mphepete mwa pitch pamalo olumikizirana). Izi ndizokwanira pa voltage yogwira ntchito ya 250V yokhala ndi digiri ya kuipitsidwa kwa mpweya 2 pa IEC 60947-7-4. Pa voltage yogwira ntchito ya 300V, pitch yofunikira ndi 5.0 mm, zomwe zikutanthauza kuti pini ina iliyonse iyenera kusiyidwa yopanda anthu kuti ifike pa pitch ya 10.0 mm.

Kuyang'anira Kupanga ndi Mayeso a QC Omwe Timachita pa Gulu Lililonse

Gulu lililonse lopanga la ma terminal block a 301-5.0 limadutsa mayeso anayi ofunikira a QC pamalo athu tisanatumize. Choyamba ndi mayeso a torque: timayika 0.4 Nm ku screw yolumikizira pogwiritsa ntchito screwdriver yolinganizidwa bwino ndikuwonetsetsa kuti screw imazungulira momasuka kudzera madigiri 360 popanda kumangirira. Chachiwiri ndi mayeso okoka waya: timamangirira waya wa 14 AWG pa 0.4 Nm ndikukoka pa 50 Nm kwa masekondi 10 - wayayo sayenera kusuntha. Chachitatu ndi mayeso a salt fog pa zitsanzo 5 pa zidutswa 10,000 - maola 48 mu 5% NaCl pa 35°C pa IEC 60068-2-11, popanda dzimbiri looneka pa pini yamkuwa kapena screw yophimbidwa ndi tin. Chachinayi ndi kuwunika kwa magawo pa IEC 60947-7-4 kuti tipeze malo olumikizirana, m'lifupi mwa nyumba, ndi kutalika pogwiritsa ntchito njira yoyezera masomphenya yokhala ndi kulondola kwa ±0.01 mm.

Mu 2024, tinayesa magulu 47 opanga pogwiritsa ntchito njira iyi ndipo tinakana magulu atatu: limodzi la ma torque osabwerezabwereza pa siteshoni imodzi yolumikizira yokha, limodzi la ma pellets a PA66 omwe akuwonetsa chifunga chomwe chimasonyeza kuyamwa kwa chinyezi panthawi yosungira, ndi limodzi la kusintha kwa kutalika kwa pini komwe kumachitika chifukwa cha die yosweka. Mavuto onse atatu adakonzedwa gulu lotsatira lopanga lisanafike.

Kuyesa kwa Torque ndi Deta Yodalirika Yolumikizira

Skurufu yolumikizira pa 301-5.0 ndi yachitsulo cha M2.6 yokhala ndi zinc-plated finish. Mu kuyesa kwathu kwa torque yopanga, timagwiritsa ntchito 0.4 Nm ndikuyang'ana zinthu zitatu: skurufu imazungulira momasuka kudzera madigiri 360 popanda kumangirira, kuthamanga kwa clamping kumafika pa 20 N pa waya, ndipo mutu wa screw sumachotsa. Deta yathu ya 2024 kuchokera ku magulu 47 inasonyeza torque yogwira ntchito ya 0.38 Nm yokhala ndi deviation ya 0.03 Nm. Palibe zitsanzo zomwe zinalephera pa malire a 0.4 Nm.

Pa maoda obwerezabwereza opitilira zidutswa 5,000 pamwezi, timayendetsa ma thermal cycling pa zitsanzo 10 pamwezi: ma cycle 500 kuyambira -40°C mpaka +110°C. Nyumba ya PA66 ili ndi CTE ya 80 x 10⁻⁶ /°C poyerekeza ndi 17 x 10⁻⁶ /°C ya pini yamkuwa. Kukula kosiyana pa -40°C kumapanga kusiyana kwa 0.02 mm mkati mwa kulolerana kwa kapangidwe ka 0.05 mm. Miyezo yapadziko lonse lapansi yachitetezo chamagetsi imasungidwa ndi IECKusintha kwa mphamvu ya clamp pambuyo pa ma cycle 500 kunali 6.2% mu deta yathu ya 2024.

Onani zathu mndandanda wonse wa block block ndi Mbiri YakampaniMiyezo yachitetezo yomwe ikutsatiridwa ndi IEC.

Kukana Kuteteza ndi Kuyesa kwa Dielectric

Kukana kwa kutenthetsa kwa chipika cha terminal cha 301-5.0 pakati pa mizati yoyandikana kumayesedwa pa DC 500V pa IEC 60512-3-1. Mu kuyesa kwathu kopanga kwa 2024 kwa zitsanzo 1,200 m'magulu 12, kukana kocheperako kwa kutenthetsa komwe kunalembedwa kunali 5,200 MOhm, ndi avareji ya batch ya 8,700 MOhm. Deta ya zinthu za PA66 ikuwonetsa kukana kwa voliyumu ya 10¹⁵ Ohm·cm pa 23°C ndi 50% RH, koma kukana kwenikweni kwa kutenthetsa mu chipika cha terminal chosonkhanitsidwa kumachepetsedwa ndi kuipitsidwa pamwamba kuchokera ku njira yopangira. Tinazindikira kuti kuwala kwa jekeseni - kutulutsa kwa zinthu za PA66 zazing'ono kwambiri pamzere wolekanitsa wa nkhungu - kumatha kuchepetsa mtunda woyenda pakati pa mizati yoyandikana kuchokera pamtengo wopangidwa wa 4.0 mm mpaka 3.2 mm ngati zinthu zoyipa kwambiri. Tinakhazikitsa njira yokonza nkhungu yomwe imapukuta chingwe cholekanitsa nthawi iliyonse 50,000, zomwe zinachepetsa kutalika kwa flash kuchoka pa 0.08 mm kufika pansi pa 0.02 mm.

Mayeso a dielectric withstanding voltage pa AC 2000V pamphindi iliyonse pa IEC 60947-7-4 safuna kusweka kapena kusinthasintha. Mu mayeso athu, magetsi osweka pakati pa mitengo yoyandikana mu 301-5.0 nthawi zambiri amakhala AC 3,800-4,200V, zomwe zimapangitsa kuti pakhale chitetezo cha pafupifupi kawiri kuposa magetsi okhazikika omwe adayesedwa. Cholepheretsa si nyumba ya PA66 — yomwe ili ndi mphamvu ya dielectric ya 25 kV/mm — koma njira yolowera pakati pa mapini awiri amkuwa pamwamba pa PCB, komwe solder fillet imachepetsa mtunda woyenera.

Onani mndandanda wonse wa block block ndi ziphasoMiyezo IEC.

Kugwirizana kwa Soldering ndi Msonkhano wa PCB Wokha

Chipilala cha 301-5.0 chapangidwa kuti chigwiritsidwe ntchito polumikiza mafunde koma chimagwirizananso ndi kulumikiza kosankhidwa ndi kulumikiza ndi manja. Pakulumikiza mafunde pa bolodi la 1.6 mm FR-4, magawo athu ofunikira ndi awa: kutentha 100-120°C kwa masekondi 60-90, kutentha kwa solder 255-260°C, nthawi yokhazikika masekondi 3-5. Pakulumikiza kosankhidwa ndi nozzle imodzi, nthawi yokhazikika yolimbikitsidwa imawonjezeka kufika masekondi 6-8 pa pini iliyonse kuti zitsimikizire kuti solder idzaze mokwanira. Nyumba ya PA66 imatha kupirira 260°C kwa masekondi 10 nthawi yonse yowonekera pa pini iliyonse, zomwe ndizokwanira pa njira zonse zolumikizira. Pakulumikiza ndi manja, gwiritsani ntchito chitsulo cha 350-380°C chokhala ndi nsonga ya 2.0 mm, chepetsani nthawi yolumikizana ndi masekondi atatu pa pini iliyonse, ndikulola masekondi 10 kuzizira pakati pa mapini kuti mupewe kusonkhanitsa kutentha m'nyumbamo. Pa ntchito zambiri zopitilira mayunitsi 10,000 pachaka, tikupangira kulongedza tepi ndi reel ya block ya 301-5.0 terminal, yomwe imalola kuyikidwa kokha pa PCB isanayambe kulowetsedwa kwa mafunde. Kapangidwe kathu ka tepi ndi reel kamakhala ndi zidutswa 500 pa reel iliyonse yokhala ndi 12.7 mm pakati pa mabuloko. Makina oyika amasankha block iliyonse pafupi ndi thupi la nyumbayo pogwiritsa ntchito nozzle ya vacuum, ndikuyiyika pa PCB, ndipo mphamvu yosungira mapini mu solder paste imasunga blockyo pamalo ake ikatumizidwa ku siteshoni yolowetsedwa kwa mafunde. Mphamvu yovomerezeka yosankhidwa ndi 5-8 N, yomwe ndi yokwanira kukankhira mapini kudzera mu phala popanda kuwapinda.

Kusankha Zinthu ndi Kutsatira Kuchuluka kwa Kuyaka

Chipinda cha 301-5.0 chimapangidwa ndi jakisoni kuchokera ku PA66 (nayiloni 66) ndi mulingo wa UL94 V-0 woyaka pa makulidwe a 0.8 mm. Chiyeso cha V-0 chimafuna kuti chitsanzo chilichonse chizime mkati mwa masekondi 10 choyatsira moto chitatha kuchotsedwa, popanda madontho oyaka omwe amaloledwa. Mu kuyesa kwathu kwamkati kwa zitsanzo 100 kuchokera ku malo 10 opangira, nthawi yapakati yozimitsira moto inali masekondi 3.2 ndi masekondi 7 okha. Zipangizo za PA66 zimaperekanso chizindikiro chofananira chotsata (CTI) cha 600V pa IEC 60112, zomwe zikutanthauza kuti pamwamba pa nyumbayo pakhoza kupirira magetsi otsatirira a 600V popanda kupanga njira yoyendetsera mpweya. Chiyeso cha CTI ndichofunikira kwambiri pakugwiritsa ntchito bolodi logawa magetsi m'malo okhala ndi chinyezi chambiri komwe kuzizira kwa pamwamba kungapangitse njira yotayikira pakati pa mipiringidzo yoyandikana nayo. Kuyenerera kwathu kwa zinthu za PA66 zomwe zikubwera kumaphatikizapo kuyesa kwa CTI pa zitsanzo zitatu pa gulu lililonse, ndi malire ofunikira a 575V osachepera. Mu 2024, gulu limodzi linalephera pa 560V ndipo linabwezedwa kwa wogulitsa.

Chipika cha 301-5.0 chilipo m'makonzedwe a mizati iwiri mpaka 12 pa chipika chilichonse. Chipika chilichonse chimakhala ndi mphamvu yofanana ya 16A 300V yamagetsi mosasamala kanthu za kuchuluka kwa mizati yonse. Ma block a mizati yambiri amatha kuyikidwa mbali ndi mbali pa PCB kuti apange kulumikizana kwakukulu kwa mizati, ndipo mtunda wa 5.0 mm umatsimikizira kuti ukugwirizana ndi ma gridi okhazikika a PCB. Pa ma board ogawa magetsi omwe amafunikira mizati yoposa 12, tikukulimbikitsani kugwiritsa ntchito ma block angapo okhala ndi malo ochepera 2.0 mm pakati pa ma block housings oyandikana nawo.

Mafunso Ofunsidwa Kawirikawiri