| Feature | Specification Details |
| Product Name | Power Supply Board / PCM Controller Card |
| Part Number | 39874425 |
| Superseded By | 49044886 (Latest Revision) |
| Cross-Reference | 39873450 / 54641337 |
| Manufacturer | Ingersoll Rand (Genuine OEM) |
| Equipment Series | SSR, Sierra, Nirvana VSD, R-Series (2-Stage models) |
| Compatible Models | MM200, SSR 50-450 HP, XFE/EPE/HPE 100-200 HP |
| Primary Function | Voltage regulation and Stepper Motor control |