I'm working on an active subwoofer made by Jamo. Subwoofer works normally but while in auto sleep mode it blows a fuse. I measured components off the PCB and only suspicious thing I found was this component. Between two adjacent legs it measured something around 70 ohms. When I removed the component from the board the corresponding solder pads' resistance went up to around 70 kilo ohms. I couldn't find any information from the internet.
I marked the component's place with a red arrow. The subwoofer is manufactured in year 2001 so it's an old component.