140MT-D9T-B10

Overview of Allen Bradley 140MT-D9T-B10

The Allen Bradley 140MT-D9T-B10 is a motor protection circuit breaker engineered for precise control and dependable protection of small motors. This device offers both manual on/off motor starting and overload protection, making it suitable for a broad range of industrial and process automation environments. The 140MT-D9T-B10 is rated for current settings between 0.63 to 1.0 A and features a fixed high magnetic trip function, designed to provide rapid disconnection in the event of short-circuit or severe fault conditions. With its compact design and DIN rail mounting, the unit integrates seamlessly into modern control panels and motor control centers. The circuit breaker's Trip Class 10 response is ideal for standard motor applications where speed of reaction and reliability are critical.

Key Features of Allen Bradley 140MT-D9T-B10

• Current adjustment range: 0.63 – 1.0 A
• High magnetic trip protection (set at 18–22 x Ie)
• Trip Class 10 motor overload protection
• Manual motor starting and control
• D Frame with high breaking capacity
• Short-circuit protection up to 100 kA at 400V AC
• DIN rail mounting for fast installation
• IP20 housing for enhanced safety
• UL, CE, and global certifications for industrial compliance

Technical Specs of 140MT-D9T-B10

• Operating current: 0.63–1.0 A adjustable
• Rated operating voltage: up to 690V AC
• Trip Class: 10
• High magnetic trip: 18–22 x Ie
• Short-circuit breaking capacity: 100 kA at 400V AC
• Frame type: D Frame
• DIN rail mount (EN 60715)
• Degree of protection: IP20
• Operating temperature: -25°C to +55°C
• Certifications: UL 60947-1, UL 60947-4-1, CE, EAC, cULus

Applications / Use Case

The Allen Bradley 140MT-D9T-B10 is designed primarily for motor branch circuit and control circuit protection in industrial environments. It excels in panelboards or motor control centers where reliable manual starting and overload protection of small motors is essential. Typical use cases include material handling equipment, conveyor drives, compact pump or fan controls, packaging line motors, and similar process machinery encountered in manufacturing, building automation, and utility facilities. The high magnetic trip capability ensures that motors are safeguarded against short-circuit and high inrush current events, thereby minimizing unplanned downtime and equipment damage. With fast installation and broad compatibility, this circuit breaker is well suited for OEM integrators and plant maintenance teams seeking consistent circuit protection combined with straightforward panel integration.

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