ASIC.TOOLS / FIRMWARE

Download Bitmain Antminer S21j XP Hyd (495Th) Firmware

Download firmware for Bitmain Antminer S21j XP Hyd (495Th) from the official source. Versions: 1. Check compatibility and release details; local copies are unavailable.

Firmware is hardware-specific. Match the exact model and control-board revision, back up settings, use stable power, test one miner first, and never interrupt an upgrade. A wrong image can make the controller unbootable.

Available versions

1 version

Exact modelOfficial source: BITMAIN Product Manual & Firmware ↗

Version

FR-1.31

FR-1.31(260525-S21j XP Hyd.).bmu

Local copy unavailableOpen official source ↗

Published / updated: 2026-08-06
Compatibility: ANTMINER S21j XP Hyd.
Size: 17.6 MB

Check file integrity · SHA-256

SHA-256

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MD5

d5c0d148e447828e25a8626242948072

Verify the downloaded file with SHA-256 before uploading it to a miner.

Release notes

MD5:d5c0d148e447828e25a8626242948072 ANTMINER S21j XP Hyd. initial firmware. Please make sure the miner type and firmware type are the same before upgrading the miner firmware.

Official source ↗

Sources checked 14 September 2026