1768-PA3 Allen-Bradley CompactLogix Power Supply Module

Allen‑Bradley 1768‑PA3 CompactLogix Power Supply – Technical Overview

Key Technical Specifications

• Manufacturer: Allen‑Bradley
• Part Number: 1768‑PA3 – CompactLogix Power Supply Module
• Input Voltage Range: 85…265V AC or 108…132V DC (selectable)
• Input Frequency: 47…63 Hz (for AC operation)
• Backplane Current: 1.4 Amps @ 24 Volts DC
• Max Input Power: 120 VA / 120 W
• Efficiency: 75% typical
• Power Dissipation: 30 W (maximum)
• Inrush Current (Nominal): 25 A @ 85…132V AC; 50 A @ 195…265V AC; 25 A @ 108…132V DC
• Inrush Current (Max): 50 A @ 85…132V AC; 80 A @ 195…265V AC
• Isolation Voltage: 30 Volts continuous
• Internal Protection: Non‑replaceable soldered fuse
• Recommended External Fuse: 4…6 A @ 28.5…36.7 A²S
• Enclosure: Open‑style (no IP rating)

Frequently Asked Questions (FAQ)

• Q: Is the 1768‑PA3 a new and original module?
  A: Yes, we supply 100% new, original Allen‑Bradley power supplies. No refurbished or counterfeit products.
• Q: Can I use the 1768‑PA3 with 1769 Compact I/O modules?
  A: Yes, it supports up to eight 1769 modules in the same bank when paired with a 1768 controller.
• Q: What is the maximum inrush current I should plan for?
  A: The maximum inrush reaches 80 A at 195‑265V AC – size your circuit breaker accordingly.
• Q: How do I know if the internal fuse has blown?
  A: The fuse is soldered and non‑replaceable. If the LED stays off and input power is good, replace the entire 1768‑PA3.
• Q: Does the 1768‑PA3 provide output power to field devices?
  A: No, it only supplies backplane power to internal logic – field outputs need separate power supplies.
• Q: What is the efficiency rating of this power supply?
  A: The typical efficiency is 75%, which minimizes wasted heat in the cabinet.
• Q: Is the enclosure suitable for outdoor or washdown areas?
  A: No – the open‑style enclosure requires installation inside a NEMA/IP rated cabinet.
• Q: Do you have stock for immediate shipment?
  A: Yes, we maintain ample stock of the 1768‑PA3. Orders ship within 5 business days.

Contact Information Inquiries: sales@nex-auto.com ， +86 153 9242 9628

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