tiastar™ standard motor control centers

Standard motor control center

Up to

600 V
  • Horizontal bus ratings 600 A to 2,500 A

  • Vertical bus ratings 300 A to 800 A

  • Multiple size options and enclosure types available

tiastar standard MCCs

Siemens tiastar standard MCCs are designed as self-contained modular units, which meet UL and NEMA standards. They come with rear-mounted, self-aligning copper stabs that firmly grasp onto the bus. Brackets guide the placement of units, further assuring positive engagement with the bus. From 22 mm to 30 mm pilot devices, from direct starters to world-class drives, Siemens tiastar standard MCCs have features and options to meet most applications.


Watch the videos below to learn more about the Siemens tiastar low-voltage motor control centers family and the SIERS retractable stabs option.


  • UL 845 labeling as applicable
  • CSA C22.2 No. 254-05 labeling as applicable when specified
  • Heavy-duty construction with up to 100 kA bus bracing
  • Up to 600 V 50/60 Hz
  • NEMA wiring 
  • Plug-in units (up to size 5 starters)
  • Door/unit-mounted pilot-device panel
  • High-density compact units available to reduce footprint.


  • Safe and sturdy design – Heavy-gauge steel is used for framing and side panels. Sections are separated by 14-gauge steel barriers that are formed to provide rigidity and durability.

  • Small footprint – With high-density MCCs, customers can save up to 50% unit space.

  • Advanced integrations of drives – With the availability of the SINAMICS G120 drives in Siemens MCCs, customers can now take full advantage of the benefits of variable-frequency drives.

  • Seismic compliance – tiastar MCCs meet IBC seismic requirements.

1 NEMA 1 only and requires forced ventilation.

2 For 600-1,200 A, 65 kA, 65 °C.

Bus and electrical ratings
Horizontal bus ratings
600 A, 800 A, 1,200 A, 1,600 A, 2,000 A, 2,500 A1
Horizontal bus material
Copper with tin or silver plating, or aluminum2 with tin plating 
Vertical bus ratings
300 A, 600 A, 800 A
Vertical bus options
Isolated (standard), insulated and isolated (optional), auto-shutters (optional)
Bus bracing
42 K AIC, 65 K AIC, 100 K AIC
Maximum voltage rating
600 V
Enclosure type 
NEMA 1 (standard), NEMA 1A, NEMA 2, NEMA 12, NEMA 3R (non walk-in)
Back-to-back option 
Section depth
15”, 20” , 21” (back-to-back), 31” (double deep), 41” (double deep)
Section width
20”, 24”, 30”, 40”, 50”, 60” 

Mailing address

Siemens Industry, Inc.

7000 Siemens Road

Wendell, North Carolina 27591

United States of America