# What is this component with metal tabs?

I am working with a Firgelli Linear Actuator Control board and came across an unusual component. At first I thought it was a heatsink, but there does not appear to be any component under the metal. It's very difficult to get a good image of it, but here are side and top views:

The inscribed label is:

X185F
UCK


Where the "X" could be some sort of logo (two intersecting V's, one inverted).

The three pins over it are for connecting RC servo input, and are not connected.

The lower metal tab is connected to Vcc as far as I can tell.

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My thought was a fuse as well. The board isn't functioning and I'm trying to troubleshoot it. Both tabs measure 12V with respect to ground; only about 3mV difference between them. –  JYelton Jul 19 at 3:04