Siemens - Marq 21 - Breaker MCC Bucket - 25 A, 480 V, 18" Height, 3 P | AmpState

Engineered for demanding industrial motor-control environments, the Siemens Marq 21 Breaker MCC Bucket is a precise, reliable solution for 25 A, 480 V, 3-Pole protection within Siemens Marq 21 MCC lineups. With an 18-inch bucket height, this unit is designed to drop into standard MCC enclosures, delivering a seamless OEM replacement or retrofit option that minimizes downtime and preserves system integrity.

Specifications at a glance

• Brand: Siemens
• Series: Marq 21
• Configuration: Breaker MCC Bucket
• Rating: 25 A, 480 V, 3-Pole
• Bucket Height: 18 inches
• Application: Suitable for OEM replacement and retrofit in Marq 21 MCC systems

Why this bucket stands out

What makes this MCC bucket unique is its precise compatibility with the Siemens Marq 21 family. It’s not a generic replacement — it’s a purpose-built component designed to drop into existing Marq 21 installations without reengineering the enclosure or wiring harness. The 25 A, 480 V, 3-Pole rating aligns with common motor-control protections for drives, pumps, and conveyors, helping you maintain reliable protection for three-phase equipment in industrial settings.

Ideal use cases

• OEM replacements for aging Marq 21 MCC assemblies to restore original performance and protection standards.
• Retrofit upgrades in manufacturing lines where modular Marq 21 buckets are standard, enabling quick maintenance cycles and reduced downtime.
• New installations that require a proven, Siemens-engineered breaker bucket sized for typical 18-inch MCC modules.

Practical benefits and outcomes

• Predictable fit: Specifically designed for Marq 21 MCC enclosures, ensuring correct mounting, wiring alignment, and electrical clearances.
• Consistent protection: 25 A, 480 V, 3-Pole configuration provides balanced three-phase protection for motors and drives in standard industrial drives.
• Restored reliability: OEM-grade construction from Siemens minimizes compatibility issues and extends the life of your MCC system.
• Global support: AmpState delivers Siemens MCC components with worldwide availability, helping you source parts quickly wherever you operate.

Tips for a smooth replacement or retrofit

• Verify your existing MCC enclosure dimensions and mounting pattern to ensure a seamless, bolt-in replacement.
• Confirm the wiring harness and interconnects align with the Marq 21 bucket specifications to avoid post-installation adjustments.
• Keep a spare bucket on hand for proactive maintenance and to minimize downtime during unplanned outages.
• Leverage AmpState as a trusted source for Siemens MCC components to ensure authentic parts and regional availability.