Sweden, currently serving as an elected member of the Security Council, backed the new sanctions which ban textile exports and restrict shipments of oil products.
"The persistent disregard for global norms and consistent defying to UN Security Council resolutions by North Korea puts millions of people at risk," said Sweden's Ambassador to the UN Olof Skoog. "Its actions represent a threat, not only to the region, by to all of us."
North Korea tested its sixth and largest nuclear weapon on September 3 and has said it would continue developing its nuclear arsenal.
Skoog said the tougher measures would further pressure to Pyongyang change its ways but added that "sanctions alone will not resolve the situation on the Korea peninsula."
He said the solution must be a "peaceful, diplomatic and political one."