Vertiv NetSure systems and Emerson R48 rectifier modules
Emerson Network Power became Vertiv in 2016, so a great deal of installed capacity still carries Emerson branding while the current catalogue says Vertiv. Same hardware lineage, two names — which is exactly why buyers struggle to find parts by searching the label in front of them.
How it sits in the shelf
The part number is printed on the module front. That number, or a phone photo of it, is all we need to start.
Availability & lifecycle
Mixed. The NetSure platform is current under Vertiv, and modules such as the R48-2900U remain widely available. But Emerson-branded plants and older NetSure controllers are firmly in legacy territory and are quoted case by case.
Models we are asked for
| Part number | Model | Indicative specification |
|---|---|---|
| R48-2900U | Emerson / Vertiv R48-2900U | 48 V · 2900 W · 50 A · ~92% efficiency |
| R48-3200 | Vertiv R48-3200 series | 48 V · higher-efficiency successor class |
| — | NetSure 701 / 501 systems | Rack and cabinet DC power systems with NetSure controllers |
Specifications are indicative and published by the manufacturer. Availability, exact revision and lead time are confirmed in the written quotation.
Where it is used
- Operator core and transmission sites
- Legacy Emerson Network Power installations
- Data-centre DC distribution
- Large multi-shelf DC plants
What to send us
Whether the plant is labelled Emerson or Vertiv, the module part number, and the controller model. On NetSure the controller generation drives compatibility more than the module does.
Not sure what the number on your label is? Look it up in the part number index →
Compatibility notes
R48-2900U and the higher-efficiency R48-3200 class are commonly cross-shopped. They are not always a drop-in pair — the plant's controller and current sharing behaviour decide it.
Common questions about this family
Is an Emerson R48-2900U the same as a Vertiv R48-2900U?
Yes. Emerson Network Power was renamed Vertiv in 2016, so the same hardware lineage carries Emerson branding on older sites and Vertiv branding on newer ones. The part is the same. This naming split is the most common reason buyers cannot find parts by searching the label in front of them.
Can an R48-3200 replace an R48-2900U?
Sometimes, but not automatically. The higher-efficiency class is commonly cross-shopped against the R48-2900U, and whether it works in your plant depends on the controller generation and how the shelf shares current. Confirm with the plant and controller model before ordering.
Engineering guides for this equipment
- Is the Emerson R48-2900U the same as the Vertiv R48-2900U?
- How do I disable temperature compensation on a NetSure controller?
- How do I identify my 48 V DC plant?
- Does my controller need a firmware update before a lithium retrofit?