Whatsminer P221C Switching Power Supply PSU 3300W for M30 M31 series

Whatsminer P221C 3300 W Switching Power Supply – M30s / M31s

The Whatsminer P221C (full part number P221C-GB-12-3300-C) is the 3300 W switching PSU originally fitted to Whatsminer M30s and M31s miners. Built with brand-new MicroBT components, it delivers the full input current and stable 12 V rail those chassis demand. Before ordering, share your exact miner model with our sales team — we'll confirm compatibility against your specific M30s / M31s revision so the swap is genuinely plug-and-play.

P221C PSU Technical Specifications

When to Replace a Whatsminer PSU

Common failure modes: the miner refuses to power on, the PSU fan spins without 12 V on the rails, an audible PSU buzz / pop with a blown input fuse, or repeated brown-outs under hashing load. Whatsminer PSUs in the P-series are non-trivial to repair on every fault — when a power-stage transformer or main capacitor has failed catastrophically, swapping the unit out for a known-good P221C is faster and more reliable than chasing the fault on the bench.

Installation & Mains Notes

Always confirm your mains voltage and circuit rating match the P221C's 220-240 VAC, 16 A maximum input. The PSU uses a C19 inlet, so make sure your PDU port or wall socket supplies a matching cord. Power the miner fully off and unplug mains before swapping the PSU. After install, monitor the first run for 12 V rail stability and PSU fan behaviour before leaving the unit unattended.

Related Whatsminer PSUs & Power Accessories

• Whatsminer P222C 3300 W PSU – M30s / M31s
• Whatsminer P221B PSU – M31s
• Whatsminer P21 3300 W PSU – C19, 200-277 VAC
• C14-to-C19 Plug Adapter – Whatsminer M20s / M30s / M50

Brand-new genuine MicroBT P221C 3300 W PSU for Whatsminer M30s / M31s. Order online or contact us at contact@lys-sz.com for carton-quantity pricing. Worldwide shipping from our Shenzhen warehouse.