Product Family Overview The XB Series offers a complete terminal block system with a universal range of accessories. Marking, bridging and testing accessories are standardized across the different clamping technologies -- reducing inventory and logistics costs. The modular terminal block design allows for use of the different terminal block types together or individually, providing the highest degree of flexibility.
Application Description The metal portion of the XB Series terminal blocks are made from high-grade, strain-crack and corrosion proof copper alloys. They won’t experience any electrolytic corrosion or rusting, even when moisture is present. The metal surfaces are protected with a lead-free, galvanic nickel or tin plating. The good electrical conductivity permits only a low temperature rise. The Polyamide 6.6 housings allow for operating temperatures up to 125°C and are certified for inflammability Class V0 in accordance with UL 94.
Flexible plug-in bridge system -- All three technologies (Screw, Spring and IDC) use the same bridge system, allowing for individual potential distribution and quickly bridged connections among the same terminal block type or across different types. The XB Series terminal blocks have two bridge shafts arranged in one line, making flexible chain bridging and skip bridging between non-adjacent terminal blocks possible. Plug-in bridges are available from 2 to 50 positions. Reducing bridges are also available to connect a larger terminal block to a smaller one.
Large surface area for marking -- All XB Series terminal blocks have generously sized surface areas for labeling. This allows for clearly labeled wiring which results in reduced start-up time and simplifies activities such as testing and maintenance. There are provisions for marking individual terminal blocks and end stops, strips of terminal blocks, and large groups of terminal blocks.
Standardized testing system -- All test plugs make contact in one of the easily accessible bridge shafts. A 2.3 mm diameter test plug is available for individual measuring wires. Modular test plugs are also available for more advanced testing.
SPECIFICATIONS FOR XBUT25 Terminal Width: 5.2 mm Maximum Wire Size: 12 AWG/2.5 mm2 IEC 60 947-7-1 in V/A/AWG: 800/32/26-12 EN 50 0191 in V/A/AWG: 750/22 or 28/26-12 UL-cUL Ratings in V/A/AWG: 600/20/26-12 TECHNICAL DATA DIMENSIONS Width/Length/Cover Width in mm (in): 5.2 (0.20)/46.9 (1.85)/2.2 (0.09) Height for 35 x 7.5/35 x 15 in mm (in): 47.5 (1.87)/55.0 (2.17) TECHNICAL DATA IN ACCORDANCE WITH IEC Maximum Load Current in A/Cross Section in mm2: 32 / 4 Rated Surge Voltage in kV/Contamination Class: 8 / 3 Surge Voltage Category/Insulating Material Group: III / II CONNECTION CAPACITY Stranded with Ferrule/with Ferrule and Plastic Sleeve in mm2: 0.25 to 2.5/0.25 to 2.5 MULTI-CONDUCTOR CONNECTION(SAME CROSS-SECTION) Solid/Stranded in mm2: 0.14 to 1.5/0.14 to 1.5 Stranded with Ferrules without Plastic Sleeve in mm2: 0.25 to 1.5 Stranded with Twin Ferrule with Plastic Sleeve in mm2: 0.5 to 1.5 Stripping Length in mm (in): 9 (0.35) Thread: M3 Torque in in-lb (Nm): 5.3 to 7.1 (0.6 to 0.8)