Hamlin SP-NO Surface Mount Reed Switch Hamlin SP-NO Surface Mount Reed Switch, Contact Resistance: 100mΩ, Maximum Release Time: 0.2ms, Operating Time (Including Bounce): 0.6ms, AT Value Range: 22-38AT, Dimensions: 15.24 x 2.28mm, MPN: MDSR-4-22-38 GBP 1.01 1