Siemens - Marq 21 - Breaker MCC Bucket - 125 A, 600 V, 9" Height, 3 P | AmpState

Introducing the Siemens Marq 21 Breaker MCC Bucket from AmpState — a purpose-built, OEM-grade solution tuned for industrial motor control applications that demand a 125 A, 600 V, 3-Pole configuration. Designed to integrate seamlessly with Siemens Marq 21 MCC lineups, this bucket enables reliable OEM replacement and straightforward retrofits, helping you maintain protection coordination and system performance with minimal downtime.

Key specifications and fit

• Brand: Siemens
• Series: Marq 21
• Configuration: Breaker MCC Bucket
• Rating: 125 A, 600 V, 3-Pole
• Bucket height: 9 inches
• Application: OEM replacement and retrofit for Marq 21 MCC panels

Why this bucket matters

When you choose the Siemens Marq 21 MCC Breaker Bucket, you’re selecting a component engineered to preserve the exact electrical characteristics your protection schemes rely on. The 125 A, 600 V rating aligns with common industrial motors and feeders, while the 3-Pole design ensures synchronized control of all three phases. Its compact 9-inch bucket height fits into standard Marq 21 enclosures without sacrificing robust mechanical support or clearances, making field installation or replacement straightforward.

Use cases — where it shines

• OEM replacement: Swap in a genuine Siemens bucket to restore original performance, ensuring compatible trip curves, contact ratings, and protection coordination.
• Retrofit projects: Update older or mismatched MCC sections with a confirmed Marq 21-compatible bucket to maintain reliability and uniformity across your control panels.
• Maintenance planning: Keep a ready-to-install spare on hand to minimize downtime during scheduled or unexpected outages.
• System expansion: Add or reconfigure additional MCC buckets in existing Marq 21 architectures without re-engineering protective logic.

Installation tips and compatibility

• Verify that the enclosure and busbar interfaces align with the Marq 21 MCC specifications to ensure smooth installation.
• Tighten terminals to the manufacturer’s torque recommendations to maintain secure connections and reliable protection signaling.
• Pair this bucket with matching Siemens protection devices and accessories to preserve coordinated protection across the drive and motor circuit.
• Consider having a spare bucket on hand for rapid replacements during maintenance windows or critical production hours.

Ideal for

Electrical engineers, maintenance technicians, OEM system integrators, and plant engineers who operate Siemens Marq 21 MCC panels and require dependable, directly compatible replacement components that keep motors protected and uptime high.

Why AmpState

AmpState is a global source for Siemens MCC components, delivering genuine parts with reliable availability. The Marq 21 Breaker MCC Bucket combines Siemens’ engineering precision with AmpState’s commitment to quick, worldwide fulfillment, making it a practical choice for both new builds and retrofits.