Noark EX9SN25B Motor Circuit Breaker, 2.5-4A, Push-Button, DIN Rail Mount

The Noark EX9SN25B motor circuit breaker is a high-quality protective device engineered to safeguard electric motors from the risks of overloads and short circuits. This compact unit features an adjustable current range of 2.5 to 4 amperes, allowing for precise calibration to match the specific requirements of your motor. Designed for seamless integration into electrical control panels, it utilizes a standard DIN rail mounting system for quick and secure installation. The intuitive push-button interface ensures straightforward operation and manual control, making it an essential component for maintaining the safety and reliability of industrial and commercial electrical systems.

Advantages

This motor circuit breaker offers robust protection by effectively interrupting power during fault conditions, which prevents damage to motor windings and associated equipment. Its adjustable thermal release mechanism provides flexibility, enabling the user to fine-tune the protection settings to the exact nominal current of the motor. The durable construction ensures long-term performance in demanding environments, while the standardized DIN rail mounting simplifies the assembly process within distribution boards. By providing both overload and short-circuit protection in a single compact housing, it optimizes space and reduces the complexity of electrical installations.

Suitable for

• Industrial motor control centers
• Commercial HVAC systems
• Conveyor belt motor protection
• Pump and compressor control panels
• General machinery automation

This device may not be suitable for applications requiring extremely high breaking capacities beyond its rated limits or for environments with extreme chemical exposure that could degrade the housing. It is also not intended for use in circuits where the motor current falls outside the specified 2.5-4A adjustment range.

Key specifications

• Current adjustment range: 2.5-4A
• Mounting type: DIN rail
• Operation interface: Push-button
• Protection type: Overload and short-circuit

To use the Noark EX9SN25B, first ensure the power supply is disconnected. Mount the device onto a standard 35mm DIN rail until it clicks into place. Connect the input power cables to the top terminals and the motor cables to the bottom terminals, ensuring all connections are tightened to the manufacturer's torque specifications. Once installed, use the adjustment dial to set the current to the motor's rated value. The push-button interface allows for manual switching and resetting after a trip event.

What to consider before purchase

• Verify that the motor's nominal current falls within the 2.5-4A range
• Ensure the DIN rail space is sufficient for the unit dimensions
• Confirm compatibility with the existing electrical control system
• Check that the environmental conditions are within the operating temperature limits

For optimal performance and safety, always ensure that the current setting is calibrated precisely to the motor's nameplate data and that all electrical connections are inspected periodically for tightness.