APW17 1215a Bitmain Power Supply Unit for Antminer S21 S19jXP
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APW17 1215a Power Supply Unit | Replacement PSU for Antminer S21 and S19jXP Air-Cooled Miners
The APW17 1215a is a switching power supply built for the Antminer S21 and S19jXP air-cooled miners. Direct replacement when the OEM APW17 unit fails or degrades — typical failure modes include capacitor drying, MOSFET fatigue on the primary stage, and fan bearing wear. A fresh PSU restores full hashrate and clears the undervoltage faults that throttle the miner before any board-level repair becomes necessary.
The primary OUT1 rail delivers 12–15V at a rated 267A on 220V input, with the OUT2 auxiliary rail providing 12.3V / 18A for the control board. Ripple and noise stay under 1% across the full output range. Short-circuit protection responds in over 10ms, and setup time is under 14 seconds from cold start. The power interface uses the standard C20 input and requires a C20 to P13 4-pin power cord on the DC output side to mate with the Antminer hashboard bus.
When to Replace the APW17 1215a
- Miner won't power on — no LED, no fan spin at PSU level, primary stage failed.
- Undervoltage faults at the hashboards — PSU output drift below the 12V threshold, hashboards refuse to start mining.
- Excessive output ripple visible on a scope — degraded output capacitors, ASIC chips will throttle or fault under load.
- Audible buzzing or PSU fan failure — magnetics or cooling fan degraded, replace before thermal damage to the primary.
- Periodic farm refurbishment — proactive PSU swap on S21 / S19jXP units approaching end-of-warranty duty cycles.
APW17 1215a PSU Specifications
| Feature | Specification |
|---|---|
| Compatibility | Antminer S21, S19jXP (air-cooled) |
| OUT1 Voltage | 12V – 15V DC |
| OUT1 Rated Current | 267A @ 220V input |
| OUT2 Voltage | 12.3V (range 12.2–12.4V) |
| OUT2 Rated Current | 18A @ 220V input |
| Ripple & Noise | <1% |
| Line Regulation | <1% |
| Load Regulation | <1% |
| Setup Time | <14 s |
| Short Circuit Protection | >10 ms response |
| Input Interface | C20 |
| DC Output Cord | C20 to P13 4-pin (sold separately) |
FAQ — APW17 1215a PSU
Q: Is this PSU original Bitmain or a third-party generic?
A: This is a third-party APW17 1215a equivalent built to the same electrical envelope. For original Bitmain stock email contact@lys-sz.com — availability varies.
Q: What power cord do I need on the DC output side?
A: Standard C20 to P13 4-pin cord — required to mate with the Antminer hashboard bus. Order it as a separate line item if you don't already have spares.
Q: Can I use this PSU on other Antminer models?
A: Designed and rated for S21 and S19jXP. The earlier APW12 / APW9 units have different output specs and shouldn't be substituted blindly — confirm pinout and voltage before connecting to other miner families.
Q: Bulk pricing for farm operators?
A: Yes — email contact@lys-sz.com with your typical monthly PSU volume and we'll send case-quantity pricing.
Related products
- Original Bitmain APW17 1215a Power Supply – S21 / S19jXP
- C20 to P13 4-pin AC Power Cord – Antminer S21 / S19jXP
- APW17 Bitmain PSU Tester – Fault Detection Tool
- Antminer APW12 PSU Test Fixture – APW12-1215
Farm operators sourcing APW17 1215a units 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).
