OSG60R017HT4ZF 600V 17mΩ MOSFET TO-247 – Antminer APW171215A PSU Repair

OSG60R017HT4ZF 600V MOSFET for Antminer APW171215A PSU Repair

The OSG60R017HT4ZF is a 600V, 17mΩ (typical) N-channel enhancement-mode power MOSFET in a TO-247-3 package, with an integrated fast-recovery diode (FRD) and charge-balance technology. It is the main power switch of the Antminer APW171215A power supply, used in the PFC boost stage and in the primary-side main switching circuit.

It replaces a faulty MOSFET directly on the APW171215A board, which powers the Antminer S21, S19j XP, KS5, KS5 Pro, AL1, AL1 Pro and L9. Built to the original specification, it combines low on-resistance, low gate charge, low switching losses and high avalanche ruggedness, and the TO-247 package fits the existing heatsink mounting positions in the PSU.

Why the OSG60R017HT4ZF Matters in the APW171215A

• Integrated FRD: reduces reverse-recovery losses in the PFC main circuit.
• Ultra-low on-resistance: lower temperature rise at high current, for continuous full-load mining operation.
• High avalanche ruggedness: withstands grid surges and inrush currents common on mining sites.
• TO-247 package: good thermal dissipation and a direct fit on the original heatsink.

Symptoms of a Failed MOSFET in the APW171215A

• Blown input fuse and no output at all after a MOSFET short or breakdown.
• Voltage dropping under full load and poor load-handling capacity.
• Abnormal heating of the PSU, caused by current imbalance between the parallel transistors.
• Unstable hashrate and frequent power-related errors on the miner.
• Repeated failure of other transistors in the same parallel bank.

Repair Notes

In the APW171215A, the OSG60R017HT4ZF works as a parallel transistor in the PFC boost stage. A shorted device can also destroy the driver IC and the current-sensing resistors, and in severe cases let high voltage reach downstream circuits, including the hashboard. Before powering the PSU again, check the input fuse, the driver IC, the current-sense resistors and the other MOSFETs of the same parallel bank: replacing only the failed transistor while a damaged driver or sense resistor stays on the board can cause the same catastrophic failure again.

OSG60R017HT4ZF Specifications

FAQ

Which miners use the APW171215A power supply?
The Antminer S21, S19j XP, KS5, KS5 Pro, AL1, AL1 Pro and L9.

Is it a direct replacement on the APW171215A board?
Yes. It matches the original specification and the TO-247 package fits the existing heatsink mounting positions.

Should I replace only the failed MOSFET?
Test the other transistors of the same parallel bank, plus the driver IC and current-sense resistors. A weak transistor left in the bank can fail soon after the repair.

Can I order several pieces for a repair bench?
Yes. Email us with the quantity and we will quote volume pricing.

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Repairing APW171215A power supplies in volume? Email contact@lys-sz.com for pricing on OSG60R017HT4ZF and other PSU components.

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