Weller wtp 90 soldering iron 90w weller t0052922299 the weller wtp 90 is a 90w temperature controlled soldering iron with wellers power response heating technologythe ability to quickly change the heating element during operation allows efficient working with several different tip types in quick successionthe iron operates from 24v ac supplied by a weller wt 1 or wt 1h power supply unit weller wtp 90 soldering iron 90w