Ƙaramin mai karya da'ira jerin CJM7-125-2 yana da muhimman halaye kamar ƙarfin wutar lantarki mai girma da ƙarfin karyewar da'ira mai girma, wanda hakan ya sa ya zama ƙaramin mai karya da'ira mai aiki sosai. Wannan mai karya da'ira ya dace da layukan rarrabawa tare da mitar aiki mai ƙima na 50Hz/60Hz, ƙarfin wutar lantarki mai ƙima na AC240/400V, da kuma wutar lantarki mai ƙima na 125A. Ana amfani da lt don kariyar wutar lantarki mai yawa da kuma ta ɗan gajeren lokaci na kayan aikin layin wutar lantarki da kayan aikin lantarki masu mahimmanci a cikin muhimman gine-gine ko wurare makamantan su, kuma ana iya amfani da shi don ayyukan kashewa akai-akai. Wannan mai karya da'ira kuma ya dace da keɓewa. Ka'idojin samfur: GB/T14048.2,IEC60947-2.
| Daidaitacce | GB/T 14048.2,IEC 60947-2 |
| Samfurin shiryayye na yanzu | 125A |
| Ƙwaƙwalwar ƙarfin lantarki mai ƙima UI | 1000V |
| Ƙwaƙwalwar da aka ƙima tana jure ƙarfin Uimp Uimp | 6kV |
| Matsayin halin yanzu | 16A,20A,25A,32A,40A,50A,63A,80A,100A,125A |
| Ƙarfin wutar lantarki mai ƙima | 240/400V(1P,2P), 400V(2P,3P,4P) |
| Mita mai ƙima | 50/60Hz |
| Lanƙwasa mai lanƙwasa | C:8Cikin ±20%,D:12Cikin ±20% |
| Adadin sandunan | 1P, 2P, 3P, 4P |
| Faɗin Unipolar | 27mm |
| Ƙarfin karya gajeriyar hanya mafi girma lcu | 10kA |
| ICS mai iya aiki da gajerun hanyoyin karyawa | 7.5kA |
| Yanayin zafi na tunani | 30°C |
| Nau'in Amfani | A |
| Rayuwar injina | Kekuna 20,000 |
| Tsawon rayuwar lantarki | Kekuna 6000 |
| An ƙima na yanzu (A) | Halayen faɗuwa da yawa | Tafiya nan take halaye(A) | |
| An amince da 1.05ln lokacin da ba a yi tuntuɓe ba H (yanayin sanyi) | Lokacin tafiya da aka amince da shi na 1.30ln H (yanayin zafi) | ||
| A≤125 | 1 | 1 | 10 Cikin ± 20% |
| A cikin>125 | 2 | 2 | |