NR8040 6R8 Power Inductor for Avalon 1246 Hashboard Power Supply

NR8040 6R8 Power Inductor | 6.8µH Metal-Alloy Shielded SMD Choke for Avalon 1246 Hashboard Repair

The NR8040 6R8 is a 6.8µH metal-alloy wire-wound power inductor located on the Avalon 1246 hashboard — used in the local switching power conversion stages that feed the ASIC chip rails. Compact 8×8×4mm shielded SMD package with low DC resistance (24mΩ) and 3.7A rated current. When the original inductor fails or degrades, the affected rail loses voltage regulation and the corresponding chip group drops out of the hashboard scan.

Metal-alloy construction delivers up to 30% higher rated current than ferrite-based inductors of the same size, plus better thermal performance under sustained mining duty. Shielded design contains the magnetic field and minimises EMI interaction with adjacent components on the dense hashboard layout.

When to Replace the NR8040

• Chip group offline on Avalon 1246 hashboard — local rail dead, inductor open or shorted.
• Excessive heat on the inductor body under normal load — winding shorted or DCR risen.
• Visible damage — cracking, blackening, or distortion of the shielded housing.
• Hashboard noise / instability at the affected rail — degraded inductor causing ripple to exceed chip tolerance.
• Preventive replacement during full hashboard rework — small cost, eliminates a future fault source.

NR8040 6R8 Power Inductor Specifications

FAQ — NR8040 6R8 Power Inductor

Q: How do I confirm the inductor is the failed part?
A: Power off. Measure DCR with a low-resistance DMM across the inductor pads — healthy NR8040 reads near 24mΩ. Shorted reads near 0Ω; open reads OL. Visual inspection for cracked / discoloured housing is the fastest first check.

Q: Metal-alloy vs ferrite — does the substitution matter?
A: For Avalon 1246 hashboard duty, yes. Metal-alloy handles higher transient currents and runs cooler at the same load. A ferrite substitute of nominally the same inductance may saturate earlier and run hotter — possible secondary failures down the line.

Q: Rework profile?
A: Standard SMD hot-air rework. Preheat to 100°C, hot air at 320°C with flux paste. The 8×8×4mm package has thermal mass — allow adequate dwell to fully reflow both pads before lifting.

Q: Bulk pricing for Avalon 1246 hashboard repair benches?
A: Yes — email contact@lys-sz.com for tape-and-reel quantities on NR8040 stock.

Related products

• HXX40 1.5µH Plug-In Power Inductor (Antminer Hashboard)
• Avalon 1166 / 1246 Boost Module 17.5V
• G337 2V Tantalum Capacitor (Antminer / Iceriver)
• Avalon 1346 / 1326 Copper Strip (PSU3400 Connection)

Avalon 1246 hashboard repair benches stocking NR8040 inductors by the reel? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.