140MT-D9E-C16

Overview of Allen Bradley 140MT-D9E-C16

The Allen Bradley 140MT-D9E-C16 is a motor protection circuit breaker designed to provide comprehensive protection for industrial motor applications. This D-frame device features an adjustable thermal current range of 10 to 16 amperes, making it suitable for protecting motors in the mid-power range. Built with high breaking capacity, this circuit breaker combines overload protection with short-circuit protection in a single compact unit. The device incorporates Trip Class 10A overload protection and phase loss sensitivity, ensuring motors are safeguarded against a wide range of electrical faults. With a standard magnetic trip fixed at 14 times the rated current (12 times for certain contactor combinations), the 140MT-D9E-C16 delivers reliable protection while minimizing nuisance tripping. Factory-assembled and rated for operation up to 690V AC with a maximum UL rating of 600V, this motor protection circuit breaker meets global safety standards including UL 60947-4-1, CSA C22.2, IEC, and CE certifications.

Key Features of Allen Bradley 140MT-D9E-C16

• Adjustable thermal current range: 10-16A
• High breaking capacity: 65-100 kAIC interrupt rating
• Trip Class 10A overload protection with phase loss sensitivity
• D-frame design with 40A maximum current capacity
• Standard magnetic trip protection (14 x Ie)
• Wide operating voltage range up to 690V AC
• Temperature rating: -25 to 70 degrees Celsius
• Mechanical endurance: 100,000 cycles

Technical Specs of 140MT-D9E-C16

• Adjustable Thermal Current Range: 10-16A
• Frame Size: D (40A max)
• Breaking Capacity: High (65-100 kAIC)
• Trip Class: 10A
• Rated Operating Voltage: 690V AC
• Maximum Operating Voltage (UL): 600V
• Rated Frequency: 50/60 Hz
• Power Ratings: 4 kW at 230V, 7.5 kW at 400/415V, 10 kW at 500V, 13 kW at 690V
• Rated Insulation Voltage: 690V
• Impulse Withstand Voltage: 6 kV

Applications / Use Case

The Allen Bradley 140MT-D9E-C16 motor protection circuit breaker is engineered for industrial motor control applications requiring reliable overload and short-circuit protection. It serves as an essential component in motor control centers, machine control panels, and standalone motor starters across manufacturing facilities. This device is particularly effective in protecting three-phase motors in pumping systems, conveyors, fans, and material handling equipment. The adjustable thermal range allows precise tuning to match specific motor characteristics, preventing premature tripping while maintaining adequate protection. With phase loss sensitivity, the 140MT-D9E-C16 protects motors from single-phasing conditions that can cause winding damage. The high breaking capacity makes it suitable for installations with significant available fault current. Compatible with Allen Bradley contactors from the 100-K, 100-C, and 100-E series, this circuit breaker integrates seamlessly into coordinated motor control solutions for both single motor and motor group installations. Its wide voltage rating supports global applications across various power distribution systems.

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