IN Brief:
- The TP65H020G4PLSGBD combines 650V operation and 20mΩ typical on-resistance in an 8×8mm PQFN package.
- Dual-side cooling reduces mounting footprint by 57% compared with Renesas' existing 10×15mm TOLT format.
- Samples are targeting 800V intermediate bus conversion, battery backup units, and capacitor bank applications.
Renesas Electronics has started sampling the TP65H020G4PLSGBD, a 650V gallium nitride power transistor in an 8×8mm dual-side-cooled PQFN package for 800V high-voltage DC power architectures. The device provides 20mΩ typical on-resistance and is aimed at high-density conversion stages in AI data centres.
Renesas says the package occupies 57% less mounting area than its existing 10×15mm TOLT format. The company also reports a 10% reduction in top-side thermal impedance, with heat extraction available through both sides of the package rather than relying on a single primary cooling path.
The device is based on Renesas’ Gen IV Plus GaN platform and combines a high-voltage depletion-mode GaN HEMT with a low-voltage silicon MOSFET to provide normally-off behaviour compatible with standard gate drivers. Typical total gate charge is 19.6nC, and the specified operating temperature range extends from -55°C to +150°C.
Renesas is targeting intermediate bus converters that step an 800V distribution rail down towards lower voltages used deeper inside a computing rack. Battery backup units and capacitor bank units are also named applications. Samples are already being supplied to AI data centre OEM and ODM customers, although the company has not announced a volume-production date.
The move towards an 800V distribution bus is being driven by rising rack power. Carrying a given amount of power at a higher voltage reduces current, allowing conductor losses and copper requirements to be reduced, but the higher bus voltage places greater demands on switching devices, isolation, protection, and converter design.
Wide bandgap semiconductors are increasingly being positioned across that conversion chain. Recent 800V server power development has extended from GaN drivers and co-packaged devices into sensing, isolation, and control, reflecting the number of supporting functions required around the main switching stage. Renesas is approaching the same problem through the power transistor package itself.
GaN can support higher switching frequencies and lower switching losses than conventional silicon MOSFETs in suitable converter topologies. Higher frequency can reduce the size of magnetic components and filters, but it also increases the sensitivity of the circuit to package inductance, PCB layout, gate-loop design, electromagnetic compatibility, and switching transitions.
The package therefore becomes part of the electrical design rather than a mechanical detail added after the semiconductor is selected. A smaller footprint can shorten high-current paths and release board area, while dual-side cooling gives thermal engineers another route for moving heat into cold plates or other cooling structures. The final benefit still depends on the complete assembly, including PCB construction, thermal interface materials, magnetics, and coolant or airflow design.
Renesas’ product page lists a minimum drain-source voltage of 650V, a typical on-resistance of 20mΩ, and maximum junction-related operation within the stated -55°C to +150°C range. The device uses a ten-lead PQFN package and is supplied for surface mounting, placing it within an assembly format already familiar to high-volume power electronics manufacturers.
Qualification inside an AI data centre power shelf will extend beyond those component specifications. Designers will need to establish efficiency across the full load range, switching behaviour with real parasitics, thermal cycling, fault response, gate-drive margins, and assembly repeatability once the package is attached to both the PCB and its cooling structure.
The 57% footprint reduction is therefore useful only if the smaller device can maintain thermal and electrical performance once installed. At megawatt-scale rack powers, converter density cannot increase indefinitely by reducing component size alone; heat rejection, busbar geometry, protection, and maintainability remain system constraints. Renesas’ new GaN device addresses one part of that equation by reducing the physical area occupied by the high-voltage switch while opening a second route for heat removal.
