CP 4012D Oring Tub

4000 series O-ring tub for the Wolfspeed. XM3 module with MDT pin fin baseplate.

The 4012D O-ring tub is a double-sided aluminum friction stir welded tub for direct cooling of the Wolfspeed XAB525M12XM3.

Flow paths have been optimized specifically for the high heat flux of silicon carbide. The combination of this tub and the XAB module with MDT (micro deformation technology) baseplate allows for very low thermal resistance, low-pressure drop, and balanced parallel flow.

Using a 50/50 water-ethylene-glycol coolant with a flowrate of 12 L/min and a temperature of 25°C, the maximum power dissipation for the flat baseplate CAB450M12XM3 is measured at 750 W per position at a junction temperature of 175°C for a thermal resistance of 0.2°C/W for RΘJL. For the same coolant conditions, the direct-cooled XAB525M12XM3 has a maximum power dissipation of 1070 W at a junction temperature of 175°C for a thermal resistance of 0.14°C/W for RΘJL.

We can see from these results that while the 0.13°C/W RΘJC specified for the CAB450M12XM3 is lower than the RΘJL of the XAB525M12XM3, when you factor in the thermal resistance of the TIM and cold plate, the actual RΘJL for the flat baseplate module is 43% higher than the direct-cooled module. For the designer this means that using the direct-cooled solution leads to a lower junction temperature for the same power level, resulting in better reliability. Alternatively, the output power can be increased with the additional thermal overhead.

NOTES:
DIMENSIONS AND TOLERANCES IAW ASME Y14.5M – 1994
MATERIAL: ALUMINUM 6061-T6 OR 6063-T6 (TUB) / METRIC O-RING ISO 3601, BUNAN/NITRILE, SHORE 70ª (O-RING)
FINISHED ASSEMBLY MASS: 680 GRAMS

Custom Options (call or email):

• Length: Extrusion length can change to accommodate up to 8 IGBTS
• Ports: NPT/SAE/BSPP (G)/ Welded on hose barb
• Plating Options: Electroless Nickel inside and out available
• Double sided options

Advanced Friction Stir Welding