SIEMENS Auxiliary Switch Block 3RH1921-2DA11 by Siemens Save Liquid error (product-badge line 32): -Infinity% $23.00 10 IN STOCK 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart SIEMENS Auxiliary Switch Block 3RH1921-2DA11 1NO/1NC