I want to evaluate this full-wave bridge rectifier for a project I'm working on. Because of the high-voltage involved (120 VAC), and because the part is SMD and I'll be swapping out various filter capacitors, I built a test setup that's a little more substantial than a breadboard (see top and bottom photos below). The part accepts AC fine (via the ~ input terminals), and outputs 106 VDC (RMS) via the output terminals (+ / -), as read by a DMM. It even shows a rough approximation of the expected waveform (well, half-wave rectified) when I attach an ungrounded scope probe to the + (red) output terminal (below).
As soon as I touch the probe's ground lead to the - (black) output terminal, however, I blow a mains fuse and the rectifier dies. What am I doing wrong?
As soon as I touch the probe's ground lead to the - (black) output terminal, however, I blow a mains fuse and the rectifier dies. What am I doing wrong?