Liftoff was at 2238 GMT.
The satellites, which will take up slots in geostationary orbit, were the 1.275-tonne BSAT-2c for Japan's B-SAT satellite operators, and the 4.725-tonne Optus and Defence C1, whose capacity has been divided up between the Australian civilian operator Optus and the Australian Department of Defence.
Arianespace used a so-called Generic, or standard version, of the Ariane-5.
An uprated version of this rocket, the Ariane-5 ECA, capable of hoisting a 10-tonne payload into orbit, has been placed on ice after a disastrous failed maiden launch last December.
ESA is spending a total of 330 million euros (389 million dollars) to fix the ECA's design flaw, carry out other modifications and conduct two test launches of it.
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