1492-SP1C040 | Allen Bradley | 1492-SP Miniature Circuit Breaker

Product Overview

The Allen Bradley 1492-SP1C040 functions as a high-performance supplemental protector within the 1492-SP wiring system. This single-pole miniature circuit breaker provides critical overcurrent protection for control circuits, solenoids, and PLC I/O points. We supply this component as 100% Brand New and Factory Original, ensuring that the internal thermal-magnetic trip mechanisms meet strict factory calibration for equipment safety.

Technical Specifications

The 1492-SP1C040 utilizes precision-engineered components to handle 1-phase AC voltage ranges efficiently:

Engineering Advantages

• C-Curve Magnetic Response: The C-curve characteristic manages moderate inrush currents typical of inductive loads like small motors and transformers. It prevents nuisance tripping during startup while providing instantaneous protection against high-level short circuits.

• Dual Trip Functionality: The breaker employs a bimetal element for long-time thermal overload protection and an electromagnetic solenoid for instantaneous short-circuit response. This "LI" (Long-time/Instantaneous) capability safeguards downstream components from both gradual overheating and catastrophic faults.

• Space-Efficient Feed-Through Design: The 0.4-inch (10mm) slim profile maximizes rail density in crowded control cabinets. This allows engineers to fit more protection points into restricted enclosure footprints without compromising thermal dissipation.

• Finger-Safe Terminals: The housing design guards against accidental contact with live parts. The 2.4 N-m torque rating ensures a high-pressure wire connection that resists loosening caused by machine vibrations or thermal expansion cycles.

FAQs

• Is this 1492-SP1C040 unit 100% Brand New?

  Yes. We supply only 100% Brand New original Allen Bradley stock. Each breaker features the original factory markings and has undergone no prior installation or use.

• What is the primary application for a C-Curve breaker?

  Engineers typically specify the C-curve for general-purpose industrial circuits. It handles the initial surge of inductive loads better than a B-curve, making it ideal for PLC power supplies and solenoid valves where a slight delay in magnetic tripping is required.

• Can I use this breaker as a primary branch circuit protector?

  The 1492-SP series serves as a Supplemental Protector (UL 1077). You should use it for protection inside an appliance or control panel where branch circuit protection (UL 489) already exists upstream.

• What wire size does the terminal accommodate?

  The terminal accepts standard industrial copper wiring. To maintain the 10 kA AIC rating and prevent hotspots, always use a calibrated torque wrench to tighten the screw terminals to exactly 2.4 Newton-meters.