An increase in exports and stable imports helped the euro zone widen its trade surplus in February, although by slightly less than expected, as a weaker euro helped soften the continued fall in sales to Russia.

Unadjusted for seasonal swings, exports to the rest of the world rose 4% and imports were unchanged.

This took the bloc's trade surplus to €20.3 billion compared to €14.4 billion in February 2014, the EU's statistics office Eurostat said today. 

Economists polled by Reuters had expected a surplus of €21.1 billion. 

Adjusted for seasonal changes, exports rose 2.8% compared to January this year, while imports increased 2.6%.

A fall of some 25% in the value of the euro against the dollar since last May has made European goods cheaper abroad, helping the currency bloc's export engine that has remained one of the few bright spots through a long debt and banking crisis. 

The weaker euro, helped by a US-style bond-buying programme by the European Central Bank, has offset a dramatic fall in trade with Russia, the European Union's third-largest trading partner, over the crisis in Ukraine. 

For the full 28-member EU, exports to Russia fell 34% in the first two months of this year compared to the same time a year ago. Imports are also down 36%. 

The West imposed economic sanctions on Russia in late July last year to punish Moscow's support for rebels in eastern Ukraine, while Moscow has implemented a food ban in retaliation.