The Danish central bank cut its key interest rate for the third time in two weeks to another historic low after intervening in the market to keep the crown within a tight range against the euro.

The central bank cut its certificate of deposit rate to -0.5 percent from -0.35 percent, making a reduction of 45 basis points since Monday last week. Read MoreWhy Denmark won't 'pull a Switzerland'

A Danish 2 kroner coin Chris Ratcliffe | Bloomberg | Getty Images

While analysts said last week that its actions might not be enough to weaken the crown, few expected another cut so soon, especially as Denmark's rate went below the eurozone equivalent of -0.20 percent, making it less attractive than the euro. Analysts have said the central bank tends to use interest rate tools after spending 10 to 15 billion crowns in intervention. "It has become expensive to have Danish crowns and the (upward) pressure is therefore expected to ease off, but whether the rate cuts are enough to turn off the 'stream' into the market is still uncertain," Danske Bank chief economist Steen Bocian said in a note. The central bank has intervened every month since September, aside from December, as the crown has strained at the upper limit of its trading band with the euro. Read MoreGlobal central banks manning the battle stations