Eaton 101073735-001 LEG Module Board with 100A Rating

The 101073735-001 is a LEG (Load Exchange Gateway) module board manufactured by Eaton for use in PENT series power distribution assemblies. It is rated for 100A continuous current and serves as a switching and protection module within modular electrical panels. The board integrates power semiconductor devices, control logic, and diagnostic interfaces to enable remote monitoring and control of branch circuits. It is designed for industrial environments requiring high reliability and maintainability.

Electrical Specifications

• Rated Current: 100 A continuous (derate to 80 A at 50°C ambient)

• Rated Voltage: 600 VAC, 50/60 Hz (3-phase or single-phase)

• Short-Circuit Withstand: 10 kA for 1 second

• Switching Elements: Solid-state relay or mechanical contactor (depending on variant)

• Control Voltage: 24 VDC (from PENT backplane)

• Dielectric Strength: 2.5 kV RMS for 1 minute (input to output)

Physical and Mechanical Characteristics

The PCB measures 200 mm × 150 mm and is constructed from FR4 material with 2 oz copper traces. It features gold-plated edge connectors for insertion into a PENT chassis. The board includes a heatsink on the back side for power dissipation (up to 50 W). Dimensions including heatsink: 220 mm × 160 mm × 45 mm. Weight: 1.2 kg. Mounting: vertical in a 19-inch rack or PENT enclosure.

Protection and Monitoring

Integrated protection includes overcurrent (electronic trip set at 110% of rated), overvoltage (clamping varistor), and overtemperature (thermostat at 90°C). The module provides status feedback via LEDs (Power, Run, Fault) and an optocoupler output for connection to PLC. A built-in current transformer (CT) measures actual load current with ±2% accuracy, accessible via a serial EEPROM interface (I²C).

Compatibility and Installation

This LEG module is compatible with Eaton PENT series power distribution systems, including PENT-600 and PENT-800 chassis. It plugs into a dedicated slot and communicates with the PENT master controller via a proprietary backplane bus. Field replacement requires no wiring disconnection (hot-swappable in some configurations). The module is UL 60950-1 recognized and CE marked.

Applications

Typically deployed in data center power distribution units (PDUs), industrial control panels, and modular UPS systems. The 101073735-001 can be used as a branch circuit controller for feeding motors, heaters, or lighting loads. For higher current ratings, consider 200A or 400A LEG modules in the same family. The module’s control interface allows integration with building management systems via Modbus or BACnet gateway.