140MT-D9T-C16

Overview of Allen Bradley 140MT-D9T-C16

The Allen Bradley 140MT-D9T-C16 is a Motor Protection Circuit Breaker designed for reliable motor starting and overload protection in industrial applications. This D-Frame device provides adjustable current settings from 10 to 16 amperes with Trip Class 10 performance, ensuring fast response to overload conditions. Built with high breaking capacity and a fixed high magnetic trip set at 18 to 22 times the rated current, this circuit breaker delivers robust short-circuit protection for motors operating at voltages up to 690V AC. The device features phase loss sensitivity protection, making it suitable for both single-phase and three-phase motor installations. Manufactured to meet UL 60947-4-1 and IEC standards, the 140MT-D9T-C16 combines disconnect functionality with comprehensive motor protection in a compact, DIN rail-mountable package. Its IP20 housing rating and wide operating temperature range from -25°C to +55°C make it adaptable to demanding industrial environments.

Key Features of Allen Bradley 140MT-D9T-C16

• Adjustable current range: 10-16A with high magnetic trip fixed at 18-22x rated current
• D-Frame construction with high breaking capacity for enhanced short-circuit protection
• Trip Class 10 overload protection with phase loss sensitivity
• Rated for operation up to 690V AC, 50/60 Hz frequency
• DIN rail mounting with side-by-side group installation capability
• Mechanical endurance: 100,000 cycles; Electrical: 100,000 cycles (0.1-16A)
• IP20 housing protection with disconnect function per IEC/EN 60947-2

Technical Specs of 140MT-D9T-C16

• Current Rating: 10-16A adjustable
• Voltage Rating: 690V AC maximum operating voltage
• Frame Size: D-Frame
• Trip Class: Class 10A
• Magnetic Trip: High magnetic trip (fixed 18-22x rated current)
• Power Ratings: 4 kW at 230V, 7.5 kW at 400/415V, 10 kW at 500V, 13 kW at 690V
• Breaking Capacity: High breaking capacity per IEC 60947-4-1
• Operating Temperature: -25°C to +55°C (compensated), -25°C to +70°C (open)
• Protection Rating: IP20 housing, IP10 main terminals
• Certifications: UL 60947-1, UL 60947-4-1, CSA C22.2, CE, IEC, cULus

Applications / Use Case

The Allen Bradley 140MT-D9T-C16 serves motor protection requirements across manufacturing, process control, and material handling systems. This circuit breaker excels in applications requiring manual motor starting with on/off control for non-severe duty cycles. The high magnetic trip setting makes it particularly effective for motors with challenging starting characteristics or applications where nuisance tripping must be minimized. Common installations include conveyor systems, pump stations, compressor units, and HVAC equipment operating in industrial facilities. The device's phase loss sensitivity protection prevents single-phasing damage to three-phase motors, extending equipment life in applications where supply stability may vary. Its compatibility with group motor installations allows multiple motors to share branch circuit protection while maintaining individual motor circuit protection. The circuit breaker's wide voltage range and international certifications make it suitable for global installations, from North American 480V systems to European 400V networks and specialized 690V industrial applications. With DIN rail mounting and compact footprint, it integrates efficiently into control panels and motor control centers where space optimization matters.

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