Bitmain APW11A1216-1a (Antminer T21) Power Supply Repair Components List

Last reviewed: May 2026 — covers the Bitmain APW11A1216-1a air-cooled power supply for the Antminer T21, with cross-references to the APW11 hydro variant (APW111721c) used on S19/S21/S23 hydro miners.

The APW11A1216-1a is the OEM Bitmain power supply for the Antminer T21 — adjustable 12V to 16V DC at up to 3610W, fed from a C20 single-phase mains inlet at 200-240V AC. It is the unit that hangs every BM1368-class hashboard in a T21 fleet, and like every high-density switching power supply running 24/7 in a mining room, it accumulates wear in predictable places. A field-repairable APW11 fixed for $20-$60 in parts and an hour of bench time beats a $389 replacement unit on raw economics — provided you can identify which component on the board has failed.

This guide is the structured components list we use in our Shenzhen workshop. Every board position is mapped to its part name, the failure mode it's most likely to be hiding behind, and the LYS replacement stocked for that exact role. The format mirrors our APW17 1215a components list for the S21/S19j XP — sister generation, same workshop discipline.

APW11A1216-1a Power Architecture (How the Components Fit Together)

Before troubleshooting, map the supply mentally. The APW11 family uses a two-stage primary topology — PFC plus LLC/quasi-resonant main switching — with synchronous rectification on the secondary side and a small auxiliary rail powering the internal control electronics. Trace it stage by stage:

Input stage. AC enters through the C20 inlet (200-240V), passes a ceramic fuse, then hits an NTC inrush limiter that softens the initial current draw into the bulk capacitor. A mechanical bypass relay shorts the NTC after pre-charge. A bridge rectifier converts AC to pulsing DC, and a high-voltage primary electrolytic stores the energy at roughly 380V DC.

Primary switching. The PFC stage holds the input above 0.95 PF at full load and feeds the main switching stage. SiC and silicon MOSFETs chop the high-voltage DC rail at high frequency into the main power transformer. The 1200V Qorvo UJ3C120150K3S and the SSW47N60S 600V N-channel MOSFETs sit in this switching path; the FCMT180N65S3 N-channel MOSFET and the FNKS8N90K MOS tube populate auxiliary switching positions.

Isolation barrier. Feedback and signaling cross the safety barrier through optocouplers and CMTI (high common-mode transient immunity) optoisolators. The TLP5772 1812TB logic-output optoisolator at the primary-to-secondary signaling path is the part that carries the digital command from the secondary-side controller back to the primary-side switching driver. When it degrades, the PSU stops responding to voltage commands while still producing approximate output.

Secondary stage. The TEA2095T synchronous rectifier controller drives the secondary-side rectification stage. Schottky and synchronous rectifiers (G5S12010C SiC Schottky on the main rail) clean up the secondary AC into a stable 12V-16V DC rail rated 3610W. Solid-polymer capacitors handle the output bulk filtering, with 0603-package SMD ceramics on the high-frequency loops.

Feedback & sensing. The MCA11205 bidirectional current sensor monitors output current for the protection logic and for the digital telemetry the T21 control board reads. The TP2262 3PEAK voltage amplifier provides precision sensing of the output rail and feeds the regulation loop back across the isolation barrier through the TLP5772 path.

Cooling. An internal axial fan, temperature-managed by the secondary controller, pulls heat out of the chassis. Spec sheet shows continuous-duty operation up to ambient 40°C; in a hot mining shed past that, fan duty cycle climbs and the bearing is the first thing to age.

APW11A1216-1a Components List (Function → LYS Replacement)

Every part below is mapped to its function on the board, the failure pattern it addresses, and the stocked replacement on lys-sz.com. Where a specific P/N is not stocked under that exact reference, "sourced on request" means we can supply the equivalent within 48h — email contact@lys-sz.com with the BOM reference and quantity.

Input Protection & Rectification

Primary-Side Power Switching

PWM & Sync Rectifier Controllers

Isolation Barrier

Analog Feedback & Monitoring

Secondary Rectification

SMD Passives (Per BOM)

The APW11 board uses a standard SMD passive set across the analog signal path, gate-drive snubbers and protection networks. None of these are stocked under each individual specific value reference — but they are commodity parts; specify by package size and value and we can supply.

Cooling, Connectors & Cabling

APW11 Hydro Variant — APW111721c (6500W)

For operators servicing the hydro side of the family, the APW11 platform has a higher-output hydro variant — the APW111721c 6500W PSU for S19 / S21 / S23 Hydro miners. The internal architecture follows the same primary/secondary topology as the air-cooled APW11A1216-1a, with the same TLP5772 isolation barrier, the same TEA2095T sync rectifier controller, and the same component-level repair path. The differences are in the output rating, the cooling (cold-plate fed by the loop instead of an internal fan), and the DC output cabling (LP-20 hydro connector instead of P34 air-cooled).

If you operate a mixed T21 air-cooled and S21/S23 hydro fleet, the parts inventory for both PSUs overlaps significantly — keeping a stocking kit of the parts above will cover both platforms.

Diagnostic Order — The Sequence We Use on the Bench

Repair throughput depends on a consistent diagnostic order — fastest fault first, most labor-intensive last. Our standard APW11 workflow:

1. Visual inspection. Burn marks on the PCB, swollen or leaking capacitors, oxidized P34 / P13 connector pins, dust-clogged fan grilles, melted housing near the heatsink. Five minutes catches half the failures.
2. Fan check. Bench-power the internal fan on 12V. If it doesn't spin freely or audibly bearings-grind, replace it — even if it's not the primary fault, you'll save a second teardown later.
3. Fuse and bridge rectifier. Continuity test on the ceramic fuse; diode test on the bridge rectifier. Open fuse = downstream short, almost always a primary MOSFET (UJ3C120150K3S or SSW47N60S). Don't replace the fuse alone — you'll blow the new one.
4. Primary MOSFET diode test. With the 500V bulk capacitor discharged, diode-test each primary MOSFET drain-to-source: UJ3C120150K3S first (most common fail-short), then SSW47N60S, then the FCMT180N65S3 / FNKS8N90K auxiliary positions. Any short = replace; check the gate-drive resistors at the same time.
5. TLP5772 isolator continuity. The TLP5772 1812TB optoisolator is a frequent silent-failure point. Symptom: PSU produces a roughly-correct output rail but does not respond to the miner's voltage-command serial. With the PSU on the bench, monitor the secondary-to-primary signaling line during a commanded voltage change. If the primary side ignores the command, the TLP5772 has degraded — replace and re-test.
6. TEA2095T sync rectifier check. Verify the secondary stage comes up cleanly on bench startup. No secondary rail = dead TEA2095T or its surrounding control circuit.
7. Output cap inspection. Probe the 12-16V rail for ripple. Above 1% peak-peak under load = degraded secondary bulk caps. Replace and re-test.
8. Loaded output test. Once the PSU comes up on the bench, connect a dummy load and run for 60 minutes. Thermal protection trips, output drift, or fan ramp-up during this period catch the 5-10% of faults that pass a cold test but fail in production.

Repair-vs-Replace — The Operator's Math

The honest math on the APW11A1216-1a: a single-component repair (one MOSFET swap, one TLP5772 replacement, one fan swap) costs $5-$25 in parts plus 30-60 minutes of bench time. A new APW11A1216-1a replacement unit runs $389. Repair lands well under a tenth of replacement cost — provided you have the parts on hand and the workshop discipline.

The exceptions: a PSU with multiple-stage failures (primary short + secondary cap degradation + fan wear simultaneously) or visible PCB damage from a catastrophic event is usually faster to part out for good components than to fully rework. Triage early and don't sink labor into units that should be parted out.

The scalable pattern for a T21 fleet: keep a small stocking inventory of high-failure-rate parts on the bench — a tray of UJ3C120150K3S and SSW47N60S MOSFETs, a strip of TLP5772 isolators, a tube of TEA2095T controllers, a set of fans, and replacement P34 sockets. With that kit and a tester, you turn around 80% of APW11 failures the same day.

Sourcing & Shipping Notes

Every linked part above is QC-tested and stocked in our Shenzhen warehouse. Parts flagged "sourced on request" in the tables — the standard SMD passives, the MF72 inrush NTC, the primary bulk capacitor, and a handful of board-specific ICs — are not in continuous stock but can be supplied within 48h. Email contact@lys-sz.com with the BOM reference and quantity.

USA and European Union orders ship DDP (all duties and taxes prepaid, no surprises on delivery). Rest of world ships from China; local customs may apply depending on jurisdiction.

Frequently Asked Questions

What is the input voltage of the APW11A1216-1a?

The APW11A1216-1a takes single-phase 200-240V AC at the C20 mains inlet, at 50 or 60 Hz. It is not a three-phase PSU and should not be wired across a three-phase supply.

What is the maximum output of the APW11A1216-1a?

3610W at 12-16V DC, adjustable across that rail window by the T21 control board through the digital command path that crosses the TLP5772 optoisolator. The full 3610W is sustained continuously up to ambient 40°C with the internal fan in its temperature-managed cooling envelope.

Is the APW11A1216-1a interchangeable with the APW17?

No. Different generation, different connector layout (P34 on the APW11 air-cooled T21 vs P14 on the APW17), different output current rating, different control signaling. Always match the PSU to the miner platform.

My APW11 outputs power but the miner reads "PSU comm error" — what's likely?

Almost always the TLP5772 1812TB optoisolator or the surrounding signaling components. The PSU's secondary digital controller is still alive and producing roughly correct output, but the command/feedback link to the primary side has degraded. Replace the TLP5772 first and re-test; if the symptom persists, check the TP2262 voltage amplifier in the secondary feedback path.

Can I run the APW11A1216-1a on a hydro Antminer like the S21 Hydro?

No. The S21 Hydro uses the APW111721c (6500W hydro variant) with the LP-20 hydro power connector — different output rating, different cabling, different cooling assumption. Use the platform-correct PSU.

How long does an APW11 component-level repair take?

For a single-component failure (one MOSFET, one capacitor, one optoisolator): 30-60 minutes on the bench including pre-discharge, identification, rework, and load-test. For a multi-stage repair (primary short cascading to multiple components): 2-3 hours. If a unit needs more than that, parting it out usually beats further labor.

What's the most common APW11 failure on T21 fleets?

Across our workshop bench, the failure-mode order on APW11A1216-1a units coming back from T21 fleets is: fan bearing wear → primary MOSFET short (UJ3C120150K3S or SSW47N60S) → secondary capacitor degradation → TLP5772 isolator drift. Visual inspection plus the diagnostic order above catches all four patterns in under an hour.

Related APW11 Parts to Keep on Hand

• APW11A1216-1a Bitmain PSU (T21, 3610W) — known-good swap unit for diagnostic confirmation
• APW11 6500W hydro variant (S19/S21/S23 Hydro)
• UJ3C120150K3S 1200V Qorvo SiC MOSFET
• SSW47N60S 600V N-channel MOSFET
• TLP5772 1812TB logic-output optoisolator
• TEA2095T synchronous rectifier controller
• MCA11205 bidirectional current sensor
• TP2262 3PEAK voltage amplifier
• G5S12010C SiC Schottky diode
• FCMT180N65S3 N-channel MOSFET
• FNKS8N90K TO-252 MOS tube
• APW11A1216 P34 6-pin socket
• Ceramic fuse 20A 500V
• LP-20 hydro power connector
• Antminer hydro PSU cable

Keep Your T21 Fleet Running

The APW11A1216-1a is a repairable, parts-supported platform — not a disposable unit. With a tester, a parts kit, and a consistent diagnostic order, most failures turn around in under an hour at a fraction of replacement cost.

→ APW11A1216-1a Bitmain Replacement PSU (T21, 3610W)

→ TLP5772 1812TB Optoisolator (Critical Repair Part)

→ UJ3C120150K3S 1200V SiC MOSFET

→ TEA2095T Synchronous Rectifier Controller

→ APW11 6500W Hydro Variant (S19 / S21 / S23 Hydro)

For bulk parts pricing, a full APW11 repair kit pre-assembled to your fleet size, or help diagnosing a specific failure pattern from a photograph, email us at contact@lys-sz.com or via WhatsApp. Worldwide shipping from our Shenzhen warehouse.

— Clem, Sales Manager, LYS Shenzhen