PK616BA 30V 50A N-channel MOSFET Innosilicon A6 A4+ Hashboard
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PK616BA 30V 50A N-Channel MOSFET for Innosilicon A6 / A4+ Hash Board Repair
The PK616BA is a 30V N-channel power MOSFET housed in a 5×6mm PDFN package, engineered for the domain power converters that step the hash-board bus down to the low-voltage / high-current supply used by the ASIC chips. It is the part typically found on Innosilicon A6 and A4+ hash boards driving each ASIC domain on the chain.
With 50A drain current and a low-Rds(on) layout, the PK616BA supports the high transient currents drawn by each ASIC domain when the chain is loaded, making it a critical wear part for repair shops servicing Innosilicon equipment.
Specifications
| Parameter | Value |
|---|---|
| Part number | PK616BA |
| Condition | New |
| Channel type | N-channel enhancement-mode |
| Vds (drain-source voltage) | 30V |
| Id (drain current) | 50A |
| Package | PDFN 5×6mm |
| Mounting | Surface mount |
| Application | Innosilicon A6 / A4+ hash board domain power converter |
| Topology | Synchronous buck / multi-phase domain converter |
| Compliance | RoHS |
Where the PK616BA fits on an Innosilicon hash board
Each ASIC domain on an Innosilicon A6 / A4+ hash board is fed by a multi-phase buck converter, with high-side and low-side N-channel MOSFETs switching the bus voltage down to a low core voltage for the ASIC. The PK616BA fills the role of the low-side switch (and, depending on the layout, the high-side switch as well), where its 30V / 50A rating handles the transient currents drawn by the domain.
Compatibility
Use as a direct replacement for PK616BA footprints on Innosilicon A6 and A4+ hash boards. The 5×6mm PDFN footprint is widely used for 30V class domain converter MOSFETs, but always verify the exact marking on the original device before substituting — pinout and electrical characteristics differ across the family.
Common failure symptoms
- One ASIC domain on the hash board reads zero or near-zero voltage
- Hash board chain fails enumeration on power-up
- Burn mark or discoloration on the PDFN package next to a domain inductor
- Hash rate drops with one domain reporting fewer chips than expected
- Short between Vin and the switch node measured at the PK616BA pads
Frequently asked questions
Can the PK616BA replace other 30V PDFN N-channel MOSFETs?
Treat as a candidate replacement. PDFN 5×6 is a common package but Rds(on), Qg and pinout vary across the family — match the original part marking before fitting.
How many PK616BA does a typical hash board need?
It depends on the number of ASIC domains on the board and the converter topology. Order one or two reels for routine repair work or share the failed-domain count with us for a tailored quote.
Do you stock matched batches for production repair?
Yes, matched same-batch parts can be supplied for high-volume repair work. Contact us with the quantity and lead-time target.
Are these new authentic parts?
Yes, condition is New. See the specifications panel for batch detail and contact us if you need a specific date code.
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