Avalon PSU3400-03 Power Supply for Avalon A1346 A1366 Miners

Avalon PSU3400-03 Power Supply | OEM Replacement for Canaan A1346 and A1366 Miners

The Avalon PSU3400-03 is the OEM-spec power supply unit for the Canaan Avalon A1346 and A1366 series miners. Built to deliver up to 3100W on the main rail with an 11.5-14.5V output and a secondary 12V / 200W auxiliary rail, the PSU3400-03 is the direct replacement when an A1346 / A1366 PSU fails in the field — same chassis dimensions, same connector pinout, same control protocol as the original.

Mining PSUs are the highest-failure-rate component on any ASIC miner — they live under continuous 90%+ load in elevated ambient temperature, switching at full duty cycle around the clock. The PSU3400-03 is the supported repair path: instead of waiting for warranty turnaround or attempting board-level repair on a failed PSU, swap in a fresh OEM unit and bring the miner back online the same day.

When You Need an Avalon PSU3400-03

• A1346 / A1366 miner won't start — fans spin briefly then PSU shuts down, no hashboard activation.
• Repeated overcurrent / overvoltage shutdowns reported in the miner controller logs.
• PSU draws AC input but produces no DC output — secondary-side bulk caps failed or main switching MOSFET shorted.
• Audible fan failure on the PSU — internal cooling fan can't be replaced, full PSU swap required.
• Visible damage — burn marks, swollen capacitors, cracked PCB on the original PSU.

Electrical Specifications

• AC input 200-300VAC, 16A — covers standard 220-240VAC mining infrastructure with derating headroom.
• Main DC output 11.5-14.5V, up to 3100W — adjustable rail voltage for the hashboard core supply.
• Auxiliary DC output 12V, 200W — powers the control board, fans, and indicator LEDs.
• OEM-spec connector pinout — direct mate with A1346 / A1366 mainboard harness.
• Built-in OCP / OVP / OTP protection — overcurrent, overvoltage, over-temperature shutdown.
• Active PFC — better than 0.95 power factor at typical load.

Avalon PSU3400-03 Specifications

FAQ — Avalon PSU3400-03

Q: Will the PSU3400-03 work on A1246 or older Avalon models?
A: No — the PSU3400-03 is specifically rated for the A1346 / A1366 power envelope. Older A1246 miners use a different PSU model with different power and connector spec — confirm before ordering.

Q: Can I run the PSU3400-03 at 110VAC?
A: No — the input range is 200-300VAC. 110VAC operation is not supported. North American mining farms typically use 240VAC service for this reason.

Q: How do I confirm a PSU failure vs a mainboard failure?
A: Disconnect the PSU output cables and measure the rails with a multimeter under no-load (some PSUs need a load to start, others self-test): if no output, PSU is failed. If output is present but the miner won't start, the failure is downstream on the mainboard or controller.

Q: What's the typical service life?
A: At continuous full-load mining duty, expect 18-36 months MTBF on the PSU — capacitor aging on the secondary side is the most common end-of-life failure mode.

Q: Bulk pricing for repair shops or farms?
A: Yes — email contact@lys-sz.com for volume pricing on A13 series PSU orders.

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Mining farms running Avalon A1346 / A1366 fleets and stocking spare PSUs? Email contact@lys-sz.com for bulk pricing and matched repair-kit options. Worldwide shipping from our Shenzhen warehouse.