Whatsminer P21E Switching Power Supply PSU 3300W 220-277VAC 50/60Hz 16A Max
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Whatsminer P21E Switching Power Supply Unit | 3300W 220-277VAC / 14.5V Original-Spec PSU for M10s / M20s / M21s / M30s / M31s Series Whatsminer Crypto Miner
The Whatsminer P21E PSU is the original-spec power supply for the broad Whatsminer M-series fleet: M10s, M20s, M21s, M30s, M31s and other compatible models. Drop-in replacement when an original P21E fails, or stock-deepening for fleet operators maintaining spare inventory across the legacy M-series generation.
Rated at 3300W with 220-277VAC input at 50/60Hz and 16A max input current — accommodates US 277V industrial grid and global 220-240V single-phase facility infrastructure. 14.5V primary output matches the OEM voltage envelope across the supported model range. Built-in protection mechanisms safeguard against output undervoltage, overvoltage, overcurrent, short-circuit, and input over-temperature events — secure power delivery for production mining. High-grade steel construction ensures durability and easy installation across years of fleet service.
When to Install / Replace the P21E
- Original PSU failure on M10s / M20s / M21s / M30s / M31s — intermittent load drops, output ripple noise, or thermal cycling issues.
- Fleet spare inventory — maintain on-hand spares for rapid swap on failed legacy Whatsminer miners.
- 277V grid deployment — the P21E's wide input range supports US industrial 277V circuits directly.
- Post-fault recovery — replacing PSU after a fault event that damaged the original supply.
- Repair shop spare stock — legacy M-series fleet repair requires this exact PSU spec.
Whatsminer P21E PSU Specifications
| Feature | Specification |
|---|---|
| Part Number | P21E |
| Category | Switching Power Supply |
| Compatible Miners | Whatsminer M10s, M20s, M21s, M30s, M31s (and compatible models) |
| Power | 3300W |
| Input Voltage | 220-277VAC |
| Input Frequency | 50/60Hz |
| Input Current (Max) | 16A |
| Primary Output | 14.5V |
| Construction | High-grade steel |
| Protections | Output UV / OV / OC / SC + Input over-temperature |
| Condition | Brand New (original spec) |
FAQ — Whatsminer P21E PSU
Q: P21E vs P21 vs P221 — which one for my miner?
A: P21E is the legacy spec for M10s / M20s / M21s / M30s / M31s. P21 is the broader Whatsminer PSU family. P221B / P221C / P222B / P222C are the modern variants for M50 / M60 series. For older M-series fleets specifically, P21E is the direct OEM match.
Q: What's the 277V input feature for?
A: US industrial facilities often supply 277V split from 480Y/277V wye grid (the wye configuration's phase-to-neutral voltage). The P21E directly accepts this — no need for a step-down transformer. For 240V or 230V residential / commercial facilities, the same PSU works without modification.
Q: Will it work on Whatsminer hydro / immersion variants?
A: No — air-cooled M-series only. Hydro variants (M53, M63) use different power delivery (P554B / P566Z series).
Q: Bulk pricing for fleet operators?
A: Yes — email contact@lys-sz.com with your fleet size for tier pricing on multi-PSU orders.
Related products
- Whatsminer P222B PSU – M50 / M60 Series
- Whatsminer P222C PSU – M20 / M30 Series
- Whatsminer P21 PSU Repair Guide
- Whatsminer CB4 V10 H6 Control Board – M-Series
Whatsminer fleet operators stocking P21E by the case? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
