LSiS MC-100a 3-Pole Contactor, 100A, 55kW, 24V DC Coil, 1NO+1NC Auxiliary Contacts

The LSiS MC-100a is a robust 3-pole magnetic contactor engineered for demanding industrial motor control and power switching tasks. With a rated current of 100A and a power capacity of 55kW at 400V, this device provides reliable performance in heavy-duty electrical environments. It features a 24V DC control coil and includes integrated 1NO+1NC auxiliary contacts, facilitating smooth integration into complex automated systems and industrial control panels.

Advantages

This contactor stands out due to its high switching capacity and durable construction, which ensures long-term operational stability under frequent load cycles. The inclusion of auxiliary contacts allows for versatile feedback and interlocking configurations, making it a flexible component for various control logic setups. Its compact design optimizes space within electrical enclosures, while the 24V DC coil provides a safe and standard control voltage for modern automation architectures.

Suitable for

• Industrial motor control systems
• Power switching in manufacturing machinery
• Heating, ventilation, and air conditioning (HVAC) control panels
• Automated production lines
• Electrical distribution systems

When it may not be suitable

This contactor is not intended for use in high-voltage applications exceeding its rated specifications or in environments with extreme corrosive gases that could damage the internal contacts. It is also not suitable for residential AC-only control circuits that require a 230V coil voltage without an external power supply conversion.

Key specifications

• Number of poles: 3
• Rated operational current: 100A
• Power capacity: 55kW at 400V
• Control coil voltage: 24V DC
• Auxiliary contacts: 1NO + 1NC

How to use

Installation should be performed by a qualified electrician in accordance with local electrical codes. Mount the contactor on a standard DIN rail or directly to the panel backplate. Connect the main power cables to the primary terminals and ensure the 24V DC control signal is wired to the coil terminals. Verify that the auxiliary contacts are correctly integrated into your control circuit logic before applying power to the system.

What to consider before purchase

• Verify that your control system provides a stable 24V DC power supply.
• Ensure the motor or load current does not exceed the 100A rating.
• Check the available space in your control panel for mounting dimensions.
• Confirm that the 1NO+1NC auxiliary contact configuration meets your interlocking requirements.

Usage recommendations

Regularly inspect the terminal connections for tightness and check for any signs of debris or dust accumulation within the contactor housing to maintain optimal electrical conductivity and prevent overheating.