Mitsubishi · 9900B
Mitsubishi 9900B three-phase UPS
The Mitsubishi Electric 9900B is a double-conversion three-phase UPS rated 300 to 750 kVA.
Mitsubishi Electric 9900B: key facts
Mitsubishi Electric lists the 9900B as current and names it as a potential replacement for the 9800A.
- TypeDouble-conversion three-phase UPS
- Power range300 to 750 kVA
- StatusCurrent
- Typical sitesFinancial, medical and cloud facilities
- Service in CanadaPreventive maintenance, battery replacement and emergency repair, including discontinued units. 1 (438) 881-3363
Sources, checked October 3, 2026: Mitsubishi Electric, 9900B; Mitsubishi Electric, UPS product lifecycle and support schedule.
How a three phase double conversion UPS carries the load, and where the bypass sits.
9900B models
The orderable configurations we supply and service:
| Model | Rating | Phase / Voltage | Part number | Status |
|---|---|---|---|---|
| Mitsubishi 9900B 300kVA | 300 kW | 3ph in/out 480V | · | Current |
| Mitsubishi 9900B 500kVA | 500 kW | 3ph in/out 480V | · | Current |
| Mitsubishi 9900B 750kVA | 750 kW | 3ph in/out 480V | · | Current |
Specifications
Batteries and battery cabinets for the Mitsubishi Electric 9900B
Battery strings and cabinets depend on the configuration and runtime. Batteries for Mitsubishi UPS cabinets are matched by string voltage and block size.
Mitsubishi Electric 9900B service in Canada
We service the Mitsubishi Electric 9900B across Canada: preventive maintenance, battery replacement and emergency repair, including units the manufacturer no longer supports. We are a Canadian UPS service and supply provider, working on three-phase systems since 2012.
- Phone: 1 (438) 881-3363
- Email: info@threephaseups.ca
- Coverage: across Canada, in English and French
Battery strings, capacitors and fans are checked as part of preventive maintenance for Mitsubishi UPS systems.
Sizing, redundancy and custom builds
We engineer the solution: load and growth analysis, redundancy (N, N+1, 2N), runtime and battery sizing, paralleling and switchgear, and custom configurations where the standard catalogue doesn't fit. Because we supply every major brand, the 9900B is one option we weigh on its merits, not the only answer.
Common questions
What is the Mitsubishi Electric 9900B?
The Mitsubishi Electric 9900B is a double-conversion three-phase UPS rated 300 to 750 kVA.
Is the Mitsubishi Electric 9900B discontinued?
No. Mitsubishi Electric lists the 9900B as current and names it as a potential replacement for the 9800A.
Who services the Mitsubishi Electric 9900B in Canada?
A Canadian UPS service and supply provider, in business since 2012, services the Mitsubishi Electric 9900B across Canada: preventive maintenance, battery replacement and emergency repair, including discontinued units. Call 1 (438) 881-3363 or email info@threephaseups.ca.
Request a quote: Mitsubishi 9900B
Tell us the application and we reply within 4 business hours with the sizing, the right system, the installation and a written quote. Three-phase installs usually need a licensed electrician, so let us know if you have one.
Brand names are trademarks of their owners and are used only to identify the equipment we service. We are not the manufacturer and are not affiliated with it.