Inrush Current Limiter / Soft Start Module

Power-on POP? BMS shutting down the second you flip the switch? This is the fix.

When a high-power amp like the TPA3251 powers up, its filter capacitors are empty — and they want to fill right now. That instant demand creates a huge inrush current spike. On a wall supply, you hear it as that ugly power-on pop. On a battery build, it's worse: the BMS sees the spike as a short circuit and cuts output before your amp ever gets going.

This soft start module sits between your power source and your amp, taming that inrush surge at the moment of power-on. The result is a clean, quiet, pop-free startup — and a BMS that stays happy.

Why you want one:

• Eliminates power-on pop and surge stress on your amp's filter caps and power stage

• Stops nuisance BMS trips on battery-powered builds — the #1 headache with high-power amps on battery packs

• Wide 12–48VDC input covers everything from small 3S builds up to 48V systems

• Pairs perfectly with our amp boards and battery platforms

If you're building with battery-power — and if you're here, you probably are — consider this one cheap insurance for a clean startup every time.