Lerdge Heated Bed Power Expansion Module MOSFET

2 of 3 units purchased worked perfectly on installation. 2nd Lerdge mosfet module failed with very dim LEDs. On replacing defective unit, inspection and testing revealed 120v terminal solder joints had failed when the terminal component’s base pins were not fully pushed into PC board for full base contact during soldering. Lerdge chose to surface-grind back side of PC boards evidenced by uniformly level and sharp edged soldered lead pins. Since the power terminal base was not solidly mounted, the grinding vibration probably caused the soldered lead pins’ joint to crack and fail, which should have been detected by Ledges QC prior to packaging and shipping! Resoldering all component leads on the #2 + #3 Mosfet boards restored full function to failed init and ensured all sub components were properly seated! Otherwise, these power Mosfets are good, inexpensive and recommended!

This MOSFET seems to do the job nicely. I bought a Duet3 for use with a printer modification and the heated bed is more powerful than the duet can handle. This works nicely for the 25Amp heat bed. Just a note to potential buyers the polarity of things are not clearly labled, but there are makings on one end of the board that show that one side is + and the other is -, that convention hold true for all of the terminals. The height of the heat sink also isn't listed but it is about 1.25" tall overall.

Appeared well made and have had zero issues so far. Had an onboard fan header, but haven't noticed it getting terribly hot yet. Mostly printing PETG on that printer, bed temps only hit 85, but seem to do so a little quicker. Honestly just glad to have the load off the board. Will still design up a 2020 mount with fan for a more permanent solution to the mount I have now. Will post to thingiverse.

Very satisfied with the quality. One of the best modules I have bought

A good way to move the heavy power switching away from the main controller board. Easy to wire. I found the provided power wires to be very light (18AWG i believe). For a 12-50 VDC circuit and being advertised at 30A it should be a minimum 12AWG for the main power in/out.