The Airpax LUX & LEX Series is the lowest-depth hydraulic-magnetic circuit breaker family from Sensata, specifically developed for modern rack Power Distribution Units (PDUs) and high-density data centers. Its compact design creates additional space for equipment, power cabling and airflow while delivering reliable branch circuit protection with interrupt ratings up to 10kA.
The LUX & LEX Series is based on the proven Airpax LEG platform while introducing an ultra-low-depth design optimized for modern rack power distribution systems. By reducing the breaker footprint inside the enclosure, it allows more space for equipment, power conductors and improved airflow, helping engineers maximize rack utilization without compromising electrical protection.
Additional advantages include:
Modern data centers demand increasing power density while minimizing the space occupied by electrical protection devices. The LUX & LEX Series was developed specifically to reduce circuit breaker intrusion into valuable rack space, allowing more room for servers, network equipment, cable management and cooling airflow.
Typical applications include:
Both the LUX and LEX Series are built on the same low-depth hydraulic-magnetic platform and are designed for high-density power distribution applications. Both offer reliable overcurrent protection, compact dimensions and ratings of up to 30A with interrupting capacities of up to 10kAIC.
The primary differences are the available contact material options and interrupt ratings.
LUX Series
LEX Series
| Parameter | Value |
|---|---|
| Technology | Hydraulic-Magnetic |
| Poles | 1 or 2 |
| Current Rating | 2A to 30A |
| Voltage | Up to 240VAC |
| Interrupt Rating | 5kAIC or 10kAIC |
| Certifications | UL489, IEC 60947-2 (pending) |
| Mounting | Panel Mount |
| Conductors | Brass or All Copper (LEX) |
| Terminals | Screw Terminals |
| Delay Curves | 61, 62, 63, 69 |
The LUX & LEX platform offers a variety of configuration options to simplify integration into OEM equipment and power distribution systems.
Available options include:
The LUX & LEX Series is designed for space-constrained electrical systems requiring reliable branch circuit protection.
Typical applications include:
Amironic provides engineering support for selecting the appropriate interrupt rating, current rating, trip curve and conductor configuration for your application. Whether you are designing a Rack PDU, upgrading a data center or developing industrial power equipment, our engineers can help you choose the most suitable LUX or LEX circuit breaker.
Contact our engineering team for technical assistance, availability and pricing.
Space inside modern Rack Power Distribution Units (PDUs) is extremely limited. A low-depth circuit breaker reduces the amount of rack space occupied by the protection device, leaving more room for power cabling, equipment and airflow. This helps improve system integration while supporting higher equipment density.
The LEX Series is available with optional all-copper conductors, which provide lower electrical resistance than standard copper-and-brass conductors. Lower resistance helps reduce power losses and heat generation, making this option particularly beneficial for high-efficiency data centers and other demanding power distribution applications.
The required interrupting capacity depends on the maximum prospective short-circuit current at the installation point. Applications with higher available fault current require a higher interrupt rating. The LUX & LEX Series is available in both 5kAIC and 10kAIC versions, allowing engineers to select the appropriate protection level for their system.
Both series share the same low-depth hydraulic-magnetic design and are intended for high-density power distribution applications. The primary difference is the conductor material. LUX models use standard brass conductors, while LEX models are also available with optional all-copper conductors for lower electrical resistance and improved efficiency.
A circuit breaker designed with a reduced installation depth, allowing more usable space inside electrical enclosures such as Rack PDUs. This design helps maximize equipment density and improve cable management and airflow.
A power distribution unit installed inside a server rack that distributes electrical power to servers, storage systems and networking equipment while providing branch circuit protection.
Internal current-carrying conductors manufactured entirely from copper to reduce electrical resistance, minimize power losses and improve efficiency in high-performance power distribution systems.
The maximum short-circuit current that a circuit breaker can safely interrupt without being damaged. The LUX & LEX Series is available with interrupt ratings of 5kAIC or 10kAIC, depending on the selected model.
The North American safety standard for branch circuit protection circuit breakers used in commercial and industrial electrical systems.
A circuit breaker that combines magnetic sensing with a hydraulic delay mechanism to provide stable and repeatable trip performance with minimal influence from ambient temperature.
Protection of individual electrical circuits against overloads and short circuits, helping improve equipment safety, reliability and system availability.
