Whatsminer P221B PSU Power Supply for Whatsminer M31s

Whatsminer P221B PSU 3300W | Genuine Replacement Power Supply for Whatsminer M31s

The Whatsminer P221B-GB-12-3300-B-V01 power supply is the dedicated replacement PSU for the Whatsminer M31s miner. 220-240VAC input, 12V / 265A main rail for the hashboards plus a 12V / 15A auxiliary rail for the control board. When the original PSU fails, swapping in a fresh P221B is faster than troubleshooting the failed unit board-level — back to hashing within minutes.

Genuine OEM unit — same form factor, same connector pinout, same electrical envelope as the PSU originally fitted at the factory. Stocked in volume for repair shops and individual operators with M31s units in production.

When to Replace the P221B PSU

• No output / miner won't start — PSU dead, hashboards stay dark even with control board confirmed healthy.
• Intermittent miner shutdowns mid-mining — PSU rail sagging under hashing load.
• Audible coil whine or burning smell not present in normal operation — internal degradation, replace before further damage.
• Blown input fuse with shorted primary — full PSU swap faster than board-level diagnosis.
• Fleet refit on aging M31s units — preventive PSU swap to keep uptime targets.

Whatsminer P221B PSU Specifications

FAQ — Whatsminer P221B PSU

Q: P221B vs P221C — interchangeable?
A: Different variants in the same family. The C variant has updated electrical / connector specs. Match the part number on your existing PSU exactly. If unsure, email us with miner model and serial before ordering.

Q: Will the P221B run on US 120V mains?
A: No — input range is 220-240VAC. North American 120V residential won't meet the input voltage minimum. US mining facilities typically use 240V service.

Q: Does P221B work on M30s / M32 / M50?
A: P221B is specified for M31s. Other Whatsminer models use different PSU variants (P21, P222, P231B, etc.). Match the PSU variant to the miner family before ordering.

Q: Bulk pricing for fleet operators?
A: Yes — email contact@lys-sz.com for volume pricing and air-freight quotes for urgent fleet repairs.

Related products

• Whatsminer P222B PSU (M30 / M50 / M60)
• Whatsminer P21 Switching PSU 3300W
• Whatsminer CB6 V10 Control Board (M20-M50)
• Whatsminer 4-pin Fan Simulator (P21 / P221 / P222)

Whatsminer M31s fleet operators refitting P221B PSU stock in volume? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.