The Schneider Electric C166TM125 is a thermal magnetic trip unit designed for the ComPacT NSX160/250 circuit breaker series. This trip unit provides essential overcurrent protection for electrical distribution systems. It is specifically engineered for applications requiring reliable thermal and magnetic tripping mechanisms to safeguard equipment from faults.

Technical details

• Series: ComPacT NSX160/250
• Trip Unit Type: TM125D
• Number of Poles: 4
• Neutral Protection: Not Protected (3D configuration)
• Protection Type: Thermal Magnetic
• Current Rating: 125 Amperes
• Functionality: Provides adjustable thermal overload protection and fixed magnetic short-circuit protection.
• Compatibility: Designed for integration with Schneider Electric ComPacT NSX160 and NSX250 frame circuit breakers.

Applications & compatibility

This trip unit is commonly employed in industrial electrical distribution panels, motor control centers, and power distribution units. It is suitable for protecting circuits in manufacturing facilities, data centers, and commercial buildings where reliable circuit breaker performance is critical for operational continuity and safety.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the C166TM125 or contact our technical team for cross-reference assistance with compatible ComPacT NSX components.