Eaton Z-MS-0,40/2 Motor Protection Circuit Breaker, 2-Pole, 0.40A

The Eaton Z-MS-0,40/2 is a high-quality 2-pole motor protection circuit breaker engineered to ensure the safe operation and precise control of electrical motors. With a rated current of 0.40A, this device serves as a critical component for safeguarding motor-driven systems against the risks of overloads and short circuits. Its compact and durable construction makes it an ideal solution for integration into standard distribution boards, providing reliable performance in both industrial and commercial electrical environments.

Advantages

This motor protection circuit breaker offers exceptional reliability by providing precise thermal and magnetic protection tailored to the specific needs of small motors. Its 2-pole configuration allows for efficient circuit management, while the robust design ensures long-term operational safety and durability even under demanding conditions. The compact form factor facilitates straightforward installation, saving valuable space in electrical cabinets and distribution panels.

Suitable for

• Small industrial motor control systems
• Commercial ventilation and pump applications
• Protection of single-phase motor circuits
• Integration into standard distribution boards

When it may not be suitable

This device is not intended for use in high-current applications exceeding its 0.40A rating, as it will cause nuisance tripping. It is also not suitable for 3-phase motor protection, as it is specifically designed as a 2-pole unit.

Key specifications

• Rated current: 0.40A
• Number of poles: 2
• Protection type: Overload and short-circuit protection
• Mounting type: DIN rail

How to use

The device should be installed by a qualified professional within a standard distribution board on a DIN rail. Ensure that the supply voltage matches the specifications of the motor being protected. Once mounted, connect the incoming power lines to the top terminals and the motor load lines to the bottom terminals. After installation, verify the connections and toggle the switch to the ON position to energize the circuit.

What to consider before purchase

• Verify that the motor's full-load current matches the 0.40A rating
• Ensure the installation environment is compatible with the device's protection class
• Confirm that a 2-pole configuration meets your specific circuit requirements

Usage recommendations

Regularly inspect the circuit breaker for signs of wear or thermal damage and perform periodic testing of the switching mechanism to ensure continued operational safety.