4506A: IBM SAS 6Gb 3-Port PCIe2 x8 1.5GB Cache RAID Adapter.
The the manufacturer 4506A is a Battery-Backed Write Cache pack, designed for enterprise RAID controllers in enterprise servers. It provides backup power to the BBWC module during unexpected power loss, ensuring cached write data is safely committed to flash memory. This is a high-volume replacement part in TPM market as enterprise servers remain widely deployed.
This part is cataloged in the U.S. Government catalog under NSN 3110-00-158-6190, indicating validated use in U.S. government and defense logistics supply chains.
| material | COPPER ALLOY RETAINER |
| alignment_type | RIGID |
| overall_height | 0.8070 INCHES NOMINAL IN |
| surface_finish | GROUND |
| special_features | BRONZE FERRULE ON ID OF ONE WASHER,WASHERS OVERLAP |
| style_designator | CLUTCH RELEASE, THRUST, LUBRICATED AND SEALED |
| bore_smallest_diameter | 2.0625 INCHES MINIMUM AND 2.0635 INCHES MAXIMUM IN |
| overall_outside_diameter | 3.4850 INCHES MINIMUM AND 3.5150 INCHES MAXIMUM IN |
| thrust_directional_capability_designation | SINGLE |
| NSN | 3110-00-158-6190 |
| OVERALL HEIGHT | 0.8070 INCHES NOMINAL IN |
| SURFACE FINISH | GROUND |
| STYLE DESIGNATOR | CLUTCH RELEASE, THRUST, LUBRICATED AND SEALED |
| THRUST DIRECTIONAL CAPABILITY DESIGNATION | SINGLE |
| OVERALL OUTSIDE DIAMETER | 3.4850 INCHES MINIMUM AND 3.5150 INCHES MAXIMUM IN |
| BORE SMALLEST DIAMETER | 2.0625 INCHES MINIMUM AND 2.0635 INCHES MAXIMUM IN |
| ALIGNMENT TYPE | RIGID |
| SPECIAL FEATURES | BRONZE FERRULE ON ID OF ONE WASHER,WASHERS OVERLAP |
| MATERIAL | COPPER ALLOY RETAINER |