Dopoochai Set 3mp4001 Top ~upd~

Here’s what I can offer to help you move forward:

Tools Needed:

• Multimeter
• Flathead screwdriver (for terminals)
• Thermal paste (optional, if you replace the included pad)
• 18-14 AWG stranded wire (depending on current)

Pros:

• Exceptional value for a 3-pole relay set
• "Top" version offers genuine contact material upgrades
• Includes sockets and clips (in most sets)
• Good sealing for PCB soldering
• Reliable for 10,000+ cycle hobbyist projects

Issue 1: Module overheats at low current (<10A)

• Cause: Insufficient heatsinking or poor thermal contact.
• Fix: Re-apply thermal paste between the IC and heatsink. Check if the fan is obstructed.

Issue 2: Output voltage fluctuates wildly

• Cause: Loose input connections or undersized input wires causing voltage sag.
• Fix: Tighten all screw terminals. Measure input voltage at the module terminals under load—it should not drop more than 5%.