After a dull 0-0 in 's Hertogenbosch, Telstar had the upper hand thanks to having home advantage in the second leg. The Velsen-Zuid side couldn't cash in on the advantage immediately as Teun van Grunsven put the visitors in front after 18 minutes from a corner.
Star man Youssef El Kachati got the home side back in the game soon after, converting a penalty in the 30th minute.
Neither side convinced or forced a winner within 90 minutes, therefore requiring a further 30 to decide who will feature in next week's finals on Thursday and Sunday.
It were Telstar who made the home crowd erupt for a second time on Friday night. El Kachati went on a mighty solo over the left side of the pitch but couldn't find the back of the net. Team-mate Danny Bakker could with a handy finish at the near post in the 109th minute.
The visitors tried, but FC Den Bosch's play-off adventure ended in the semi-finals. Telstar kept their dreams of Eredivisie football alive after 120 tense minutes and will play Eredivisie side Willem II in the finals.
View all the match statistics on Flashscore.
