UKJ series screw frame clamp terminal blocks fulfill all requirements of IEC60947-7-1、IEC60947-7-2、 GB14048.7、GB14048.8 ａｎｄ JB/T9659.1 etc. Stａｎｄards. This series products can be used in circuit of AC50Hz(60Hz), rated voltage is 500V -1000V, to connect round copper conductor which without treatment or with terminals, rated cross section is 0.14mm2~240mm2. UKJ series products have CE certificates in 2001, CCS (China Classification Society ) certificates in 2002, ａｎｄ CQC (China Quality Certification) certificates, some leading models have VDE ａｎｄ UL Approval. Characters: 1、 Reasonable structure, mounting on G or TH rails expediently with its reasonable structure ａｎｄ flexible Nylon material, universal, installed with bracket if when cross section larger than 50mm2; 2、Compact, much models for your need, connect with large cross section connector; 3、Good conductivity, copper clamp frame ａｎｄ copper screw are used when cross section less than 50mm2, ａｎｄ take steel clamp frame ａｎｄ steel screw when larger than 50mm2 to ensure reliable connection.