Siemens Current Transforme. Overall Height: 54mm. Overall Width: 9.2mm. Overall Depth: 18.3mm. Minimum Temperature: -25°C. Maximum Temperature: +60°C. Dimensions: 9.2 x 18.3 x 54 mm. Mounting Type: Snap-On Mount. For Use With: 3UL23 Residual Current Transformers. MPN: 3UL2900