TPHR8504 TPHR8504PL N-Channel MOSFET for Bitmain PSU APW7 APW8 APW9 AWP12

TPHR8504 / TPHR8504PL MOSFET | 40V N-Channel Silicon Power MOSFET in SMD Package with High-Speed Switching for Bitmain APW7 / APW8 / APW9 / APW12 Power Supply Unit Repair and DC-DC Converter Designs

The TPHR8504PL is a 40V N-channel power MOSFET in compact SMD package — the go-to switching element across the Bitmain APW7 / APW8 / APW9 / APW12 mining PSU families. Drop-in replacement for failed switching MOSFETs during PSU repair, refurbishment, or production-line assembly.

Built for high-efficiency DC-DC converters and switching voltage regulators, the TPHR8504PL combines low drain-source on-resistance, small gate charge, and low leakage current — the trifecta that determines switching efficiency and thermal headroom in high-current PSU primary / secondary stages. Wide -55°C to +175°C TJ operating range provides thermal margin in densely-packed PSU enclosures with elevated ambient temperatures during 24/7 mining operation.

Typical Use in Bitmain PSU Repair

• APW7 / APW8 / APW9 / APW12 PSU rebuild — primary and secondary switching MOSFET failures.
• Hot-failure recovery — replacing MOSFETs after thermal runaway events.
• Cold-failure recovery — replacing MOSFETs with degraded Rds(on) showing efficiency drop.
• Production assembly — refurb shops needing bulk MOSFET stock for line work.
• DC-DC converter design — general-purpose 40V N-channel switching element.

TPHR8504PL MOSFET Specifications

FAQ — TPHR8504PL MOSFET

Q: Where exactly does the TPHR8504PL sit in the APW12 schematic?
A: It's used in the secondary-side synchronous rectification stage and / or the primary half-bridge depending on the specific PSU revision. Identify the failed device by part number marking on the PCB silkscreen before ordering replacements.

Q: Can I substitute another 40V N-channel MOSFET?
A: Functionally yes — any 40V N-ch MOSFET with similar Rds(on) and gate charge will work. However, footprint and pinout must match exactly. For APW-series PSU repair, sticking with the original TPHR8504PL avoids layout issues and preserves OEM thermal envelope.

Q: How do I diagnose a failed MOSFET on a Bitmain PSU?
A: A failed switching MOSFET typically shows short-circuit between drain and source (gate-to-drain leak less common). Test with multimeter diode-mode (Vf across body diode) and resistance mode (D-S resistance). Visible burn marks or cracked package confirm failure.

Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly MOSFET volume for tier pricing on repair-shop bulk orders.

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Repair shops or PSU assemblers stocking TPHR8504PL by the tube? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.