140MT-D9N-B63

Overview of Allen Bradley 140MT-D9N-B63

The Allen Bradley 140MT-D9N-B63 is a compact and reliable motor circuit protector designed for industrial motor protection in automated environments. With a rated operational current of 6.3 A and a high breaking capacity of 100 kA at 400 V AC, this model safeguards motors against short circuits and downstream faults. The 140MT-D9N-B63 belongs to the 140MT motor protection series and features a D frame construction for high durability. This unit utilizes a magnetic-only trip mechanism, set at 14 times the nominal current, making it suitable for installations where external overload protection is provided. With its IEC and regional certifications, the Allen Bradley 140MT-D9N-B63 is engineered for long operational life, reliable performance, and compatibility with international standards, ensuring it integrates smoothly into various control systems for dependable protection of valuable industrial assets.

Key Features of Allen Bradley 140MT-D9N-B63

• Rated operational current: 6.3 A (magnetic only, no thermal protection)
• High breaking capacity: 100 kA at 400 V AC
• Fixed magnetic trip at 14 × Ie for short-circuit protection
• D frame size for industrial installation
• IEC 60947 compliance and global certifications
• Simple turn handle operation and screw connections
• IP2X protection for enhanced user safety
• Compatible with DIN rail mounting

Technical Specs of 140MT-D9N-B63

• Rated permanent current (Iu): 6.3 A
• Operational voltage (Ue): up to 690 V AC
• Short-circuit breaking capacity (lcu at 400 V): 100 kA
• Rated operation power at AC-3, 400 V: 2.2 kW
• Pole configuration: 3 poles
• Switch off technique: Magnetic (fixed at 14 x Ie)
• Dimensions (H x W x D): 96.3 x 45 x 93.7 mm
• Weight: 0.39 kg
• Degree of protection: IP2X
• Connection type: Screw terminal

Applications / Use Case

The Allen Bradley 140MT-D9N-B63 is ideally suited for motor branch circuit protection in demanding industrial settings such as manufacturing, material handling, and processing plants. It provides reliable short-circuit protection for pump, conveyor, fan, and compressor motors, typically where overload protection is managed separately by dedicated relays or electronic overload devices. This arrangement is especially useful in systems with integrated control panels or motor control centers, supporting operational continuity and safety requirements. The unit’s high breaking capacity and magnetic trip response make it valuable in environments with frequent motor cycling or where high inrush currents are present, reducing nuisance tripping and downtime.

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