Antminer S21 / T21 Power Connector Pinout
VNISH · Technical Reference · ASIC Power
Correct power cable connection is critical for the Antminer S21 and T21. These models use different connectors and power schemes. Incorrect pinout or mixed phase/neutral/earth can damage the PSU, hashboards, or trigger protection.
Below is the pinout according to the original VNISH page plus the connector image with numbered contacts. Always verify against the marking on your specific cable and PSU.
Connector Image with Numbering
Antminer T21 — 5-pin connector (three-phase)
The T21 uses a special P34 connector / P33 cable (usually 5×12 AWG). Power: 380–415 V three-phase. Typical power consumption ~3610 W (NEM) / up to ~5126 W (HEM).
Antminer S21 — 3-pin connector (single-phase)
The S21 uses a P14 connector / P13 cable (usually C20–P13). Power: 220–277 V single-phase. Typical power consumption ~3500 W.
Important Connection Notes
- Cable types: T21 — P33–P33 (or P33 to lugs). S21 — usually C20–P13. Cables are not interchangeable without adapters.
- Voltage: S21 — single-phase 220–277 V only. T21 — three-phase 380–415 V. Wrong voltage will damage the equipment.
- Safety: Fully power down the PDU before connecting or disconnecting. Do not work on live circuits. Verify grounding.
- PDU: T21 often requires a dedicated ANTPDU PW12V1. S21 is compatible with most modern C19 PDUs.
⚠️ Important
Wire colors on the image are for reference only. Always verify the actual marking on your cable and connector. If in doubt, contact official VNISH support or a qualified electrician.
Sources: original VNISH page, Bitmain S21/T21 manuals, P13/P14 and P33/P34 connector data. Confirm actual power and efficiency values for your specific batch.