BCZ 3.81/10/180LR SN BK BX – 1941860000 BC 3.81, 10 Way Pluggable Terminal Block. These Weidmuller BCZ release-lever (LR) series of 180° plug socket connectors use a screw clamping yoke for conductor connection. The LR series require a flanged pin header for the levers to push against. The cable range for these BCZ LR socket connectors is 0.2 – 1.5 mm² (28-16 AWG).