Allen-Bradley 140M 140-CMN-6300 Motor Protection Breaker

Overview
The 140-CMN-6300 is a motor protection circuit breaker from Allen-Bradley’s 140M series. It provides combined overload, short-circuit, and branch-circuit protection for motors and associated circuits, ensuring safe and reliable operation across industrial environments. CE marked and CSA certified, it meets global standards for electrical safety and performance.

Technical Specifications

• Brand & Model: Allen-Bradley 140-CMN-6300

• Product Type: Motor Protection Circuit Breaker

• Series: 140M Circuit Breakers

• Max Current: 90 A

• Trip Setting Range: 40–63 A

• Current Rating: 16–90 A

• Operating Voltage: 230–690 VAC

• Short-Circuit Protection: Yes

• Overload Protection: Thermal and Magnetic

• Wire Size (Copper): #8–14 AWG

• Wire Insulation Rating: 75°C

• Standard Magnetic Trip: Yes

• High Magnetic Trip: Yes

• Torque: 6–10 Nm (55–90 lb-in)

• Ultimate Short-Circuit Breaking:

• 230/240 VAC: 50 A

• 400/415 VAC: 20 A

• 500 VAC: 10 A

• 690 VAC: 4 A

• Trip Class: 10

• Mechanical Operations: 30,000

• Electrical Operations (Max): 5,000

• Magnetic Release Current: 890 A

• Switching Frequency: 20 operations/hour

• Rated Frequency: 40–60 Hz

• Standards Compliance: IEC/EN 60947-1,-2, UL508, CSA C22.2 No.14

• Weight: 4.31 lbs (1.96 kg)

Applications
Designed for motor branch circuit protection, short-circuit interruption, manual switching, and overload control. Suitable for industrial motors, pumps, and machine control panels.

FAQ

Q: What is the maximum operating voltage for the 140-CMN-6300?
A: The breaker supports voltages from 230 to 690 VAC.

Q: Does it provide short-circuit protection?
A: Yes, it offers both magnetic short-circuit and thermal overload protection.

Q: Can it handle motors up to 90 A?
A: Yes, the maximum current rating is 90 A, adjustable via the trip setting.