-Rabada takes 5-92

-South Africa lead 1-0 in three-match series

Paceman Kagiso Rabada took 5-92 as South Africa completed an emphatic 177-run victory over Australia in the first Test at the WACA on Monday after dismissing the hosts for 361 just before tea on the final day.

The tourists claimed a third successive victory at the WACA after 2008 and 2012 triumphs and a 1-0 lead in the series, which continues in Hobart on Saturday and concludes with a day-nighter at Adelaide Oval.

Australia's batsmen were unable to cope with Rabada's pace and swing as the 21-year-old took his fourth five-wicket haul in his ninth Test, making light of the absence of South Africa's injured pace spearhead Dale Steyn.

South Africa declared on 540-8 after lunch on Sunday, leaving Australia with an imposing 539-run victory target or more realistically almost five sessions to bat out for a draw.

The hosts had looked in a strong position on day two when, having dismissed South Africa for 242, they were 158 without loss before collapsing to 244 all out.

Australia had resumed 169-4 and Usman Khawaja, Mitchell Marsh and Mitchell Starc were dismissed before lunch with Peter Siddle following after the break.

Peter Nevill, who finished on 60 not out, and Josh Hazlewood stalled the march to victory with a dogged partnership of 65 before Australia's number 10 batsman was caught at short cover for 29 to give Temba Bavuma his maiden Test wicket.

Nathan Lyon extended the tail further with a 21-ball eight before he was trapped in front by debutant spinner Keshav Maharaj to conclude the match.

Khawaja had provided the most spirited resistance for much of the innings and after he fell lbw to JP Duminy's part-time spin three runs shy of his fifth Test century, Australia's already tough task looked all but impossible.

Rabada accounted for Mitchell Marsh (26) and Starc (13), both lbw, to take his match tally to seven wickets.

Bavuma, whose brilliant run out accounted for opener David Warner on Sunday, almost claimed another key victim with his first delivery in Test cricket.

Khawaja, on 84, was plumb lbw after the ball hit a crack and thudded into his front pad but the 26-year-old had overstepped the mark and umpire Nigel Llong called a no-ball.

Lefthander Khawaja had started the morning on 58 and continued to display the same grit and determination that got him through to the close on day four, hitting 11 fours and three sixes in his 182-ball knock.

Duminy's first delivery skidded into Khawaja's back pad, however, and the 29-year-old became the second Australian batsman to perish on 97 after Warner in the first innings, the wicket that triggered the collapse.