APC SU1400RMXL3U UPS backup battery compatible replacement. Sigma SG-RBC25P is a complete 24V 18Ah AGM battery cartridge assembled with four SG1290T2 batteries. The connected assembly shown in the photos is supplied; the UPS is not included.
Match the exact SU1400RMXL3U model and revision, cartridge label, connector and wiring arrangement before ordering.
APC SU1400RMXL3U replacement specifications
| Listed UPS model | SU1400RMXL3U |
|---|---|
| Sigma replacement reference | SG-RBC25P |
| Assembly voltage | 24V |
| Assembly capacity | 18Ah |
| Chemistry | Rechargeable sealed lead-acid (SLA), AGM |
| Package quantity | One complete four-battery cartridge |
| Internal batteries | Four 12V 9Ah SG1290T2 batteries |
| Internal battery terminals | T2/F2, 0.250 inch (6.35 mm) |
| Supplier-listed assembly dimensions | 6 × 12 × 4.2 inches |
| Connection | Assembled wiring and connector as shown; compare against your existing cartridge |
Fit and installation
The supplier lists SU1400RMXL3U with this cartridge family. Check the complete assembly dimensions, connector, polarity and fuse arrangement against the existing battery and UPS documentation. Follow the UPS manufacturer’s replacement procedure and do not assume replacement while powered is permitted.
This 18Ah assembly uses four 9Ah batteries. Rated amp-hour capacity does not guarantee a fixed runtime increase; actual backup time depends on load, temperature, battery condition and the UPS cutoff voltage.
Internal battery documents
These technical documents describe one SG1290T2 battery. Use the cartridge dimensions above for the complete assembly.
Related batteries and ordering help
Browse APC UPS backup batteries. Email Sales@RocketDistributing.com with your SU1400RMXL3U label, cartridge number, connector photos, quantity and delivery location for matching help or volume pricing.
APC is a trademark of Schneider Electric. This is an aftermarket compatible replacement supplied by Sigma Power Systems.