Bitmain Antminer T21 ‘Transformer’


Location: St. Louis, MO
Shipping Date: Ships within 3 business days
Tariffs: Price includes all tariffs & import duties for US buyers. International DDP (duties prepaid) shipping option available.

SKU: ATBT21TRX Categories: , Tag:

Bulk Discounts

Quantity3 - 910 - 2425 - 99100 +

Brand New Bitmain Antminer T21 ‘Transformer’

Antminer T21 is one of the most affordable Bitcoin miners that runs at sub 20J/T efficiency. Yet its direct 3 phase ~400V power requirement, makes it impractical for many miners. 

We modified Antminer T21 to run on single phase 240V power, by swapping stock PSU with APW12, new power bus bars & custom designed 3D Printed PSU cover. We are calling this Antminer T21 Transformer.

This is a plug & play Bitcoin miner that runs at 170T | 3230Watts | 19J/T on single phase 240V. 

  • Ships with Vnish Firmware
  • Comes with APW12 PSU , stock APW11 PSU & power bars are not included


Product Glance 
ModelT21 Transformer
Algorithm | CryptocurrencySHA256 | BTC/BCH/BSV
Hashrate, TH/s170 
Power on wall @25°C, Watt3230
Power efficiency on wall @25°C, J/TH19.0
Detailed Characteristics 
Power Supply 
Power supply AC Input voltage, Volt(1-1)200~240
Power supply AC Input Frequency Range, Hz47~63
Power supply AC Input current, Amp(1-2)20(1-3)
Hardware Configuration 
Networking connection modeRJ45 Ethernet 10/100M
Miner Size (Length*Width*Height, w/o package),mm(2-1)400*212*290
Miner Size (Length*Width*Height, with package),mm570*316*430
Net weight, kg(2-2)14.4
Gross  weight, kg(2-2)16.1
Noise, dBA @25°C (2-4)76
Environment Requirements 
Operation temperature,°C0~45
Storage temperature,°C-20~70
Operation humidity(non-condensing) , RH10%~90%
Operation altitude, m(3-1)≤2000


Profitability Calculator

T21 Transformer Kit Installation Guide

Frequently Asked Questions

T21 PSU is not included with the miner. This comes with APW12 PSU that is commonly found on Antminer S19 series. 

Like everything else in our store, this comes with our 14 day Altair Warranty. 

Please be aware that this modification voids Bitmain’s warranty

Stock Antminer firmware does not allow running Antminer T21 on APW12. 

This miner ships with our white label copy of Vnish firmware that charges 2.8% fees.

Yes you can load any firmware of your choice. 

We recommend staying under 175T hashrate for this miner. APW12 PSU can not provide enough power to support higher hashrates.

Yes, this can be underclocked down to about 100T hashrate via Vnish firmware webUI. 

Weight40 lbs
Dimensions22 × 17 × 13 in




Choose Variant

Antminer T21 Transformer, T21 Transformer Conversion Kit, PSU Cover

You may also like…

Shopping Cart
Bitmain Antminer T21 ‘Transformer’
$19.99$3,239.00Select options
Scroll to Top