Allen-Bradley 1768-PA3 | CompactLogix AC/DC Power Supply Module

Overview

The Allen-Bradley 1768-PA3 is a CompactLogix power supply module designed to energize backplane modules efficiently. It accepts dual inputs of 85–265VAC or 108–132VDC, ensuring reliable power delivery across industrial applications. The module features integrated overcurrent protection of 15A to safeguard connected components.

Technical Specifications

• Manufacturer / Brand: Rockwell Automation / Allen-Bradley

• Part Number: 1768-PA3

• Product Line / Type: CompactLogix / Power Supply Module

• Module Type: AC Power Supply Module

• Input Power: 85–265V AC; 108–132V DC

• Input Frequency: 47–63 Hz (AC)

• Maximum Input Power: 120 VA / 120 W

• Efficiency: 75% Typical

• Isolation Voltage: 30 V Continuous

• Inrush Current, Nominal / Max: 25 A @85–132V AC, 50 A @195–265V AC; 25 A @108–132V DC, 80 A @195–265V AC

• Backplane Current: 1.4 A @ 24 V

• Power Dissipation: 30 W Max, 7.5 W typical

• Internal Overcurrent Protection: Soldered non-replaceable fuse

• Recommended External Protection: 4–6 A @ 28.5–36.7 A² S

• Enclosure: Open-style

• Mounting: DIN Rail or Panel Mount

• Shipping Weight / Dimensions: 2 lbs / 8 x 8 x 5 in

• UPC: 10612598307569

Connectivity and Performance

The 1768-PA3 supplies consistent backplane current to CompactLogix modules while supporting efficient AC/DC conversion. LED indicators provide real-time status, enabling easy monitoring and troubleshooting. Its wiring category 1 ports accept 14–22 AWG stranded or solid copper wire rated at 167°F, ensuring secure connections.

Reliability and Safety

This module’s internal soldered fuse and recommended external overcurrent protection prevent electrical faults. The 75% typical efficiency and robust construction reduce energy waste while maintaining reliable operation in industrial environments.

Installation Flexibility

The 1768-PA3 features an open-style enclosure and can be mounted on DIN rails or panels. Its compact dimensions simplify integration into control cabinets while delivering high-performance power to connected modules.