Siemens - Marq 21 - Breaker MCC Bucket - 250 A, 480 V, 30" Height, 3 P | AmpState

Meet the Siemens Marq 21 Breaker MCC Bucket — a purpose-built component tailored for demanding industrial motor control centers. Designed for 250 A at 480 V in a precise 3-pole configuration, this 30-inch bucket integrates seamlessly into Siemens Marq 21 MCC lineups, delivering reliable control and straight‑forward OEM replacement or retrofit upgrades.

Key features that matter in the field

• Exact OEM compatibility: Engineered to fit Siemens Marq 21 MCC systems, ensuring proper electrical alignment and mechanical fit without custom modifications.
• High-capacity performance: Rated for 250 A at 480 V across 3 poles, supporting robust motor control for demanding workloads.
• Standardized form factor: 30" bucket height matches common MCC frame dimensions, simplifying installation and inventory planning.
• Motor control center readiness: Specifically built for Breaker MCC configurations, enabling quick replacement in active facilities with minimal downtime.
• Verified for retrofit and OEM replacement: Ideal for updating aging MCCs or priming new installations that demand Siemens’ Marq 21 architecture.
• Global availability through AmpState: Sourced and supported by AmpState’s worldwide network of Siemens MCC components, ensuring supply continuity and service support.

What problems does it solve?

In busy industrial environments, MCC downtime can ripple through production lines. This Marq 21 Breaker MCC Bucket delivers a drop-in retrofit option that preserves existing wiring harnesses and frame interfaces while delivering renewed switching capability at 250 A/480 V. Its 3‑pole design supports balanced, three-phase control, helping you maintain stable motor starting and protection. With exact Marq 21 compatibility, you reduce commissioning time and avoid tricky modifications that can introduce risk.

Ideal use cases

• OEM replacement in active Siemens Marq 21 MCC installations, preserving original design intent and electrical characteristics.

• Retrofit projects upgrading aging MCC bays to maintain performance and reliability without replacing the entire cabinet.

• New builds requiring a 250 A, 480 V, 3‑pole bucket within the Marq 21 family, offering a proven path to scalable motor control.

How it compares and why this choice stands out

Compared with generic MCC buckets, this Siemens Marq 21 bucket is purpose-built for the Marq 21 lineup, matching both electrical specifications and mounting geometry. The 30" bucket height aligns with standard MCC frames, reducing the need for custom enclosures or adapters. When you pair this bucket with AmpState’s global supply network, you gain confidence in availability, authentic Siemens quality, and service support to keep downtime to a minimum.

Practical tips for installation and maintenance

Before installation, confirm the MCC frame compatibility and pole configuration aligns with a 250 A, 480 V, 3‑pole setup. Use the bucket’s 30" height as a baseline for cabinet clearance and downstream connections. For retrofit scenarios, map existing wiring and protective devices to ensure seamless integration with current protection schemes and control circuits. Regularly inspect contact surfaces and interlocks during routine maintenance to preserve reliable switching performance.

What you get

• Siemens Marq 21 Breaker MCC Bucket, 250 A, 480 V, 3-Pole
• Bucket height: 30 inches
• Designed for OEM replacement and retrofit within Siemens Marq 21 MCC lineups
• Available through AmpState, a global supplier of Siemens MCC components