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How do you identify genuine discontinued parts versus 'temporarily unavailable' components in the current supply chain chaos, especially when dealing with legacy Allen-Bradley PLC-5 systems that the OEM says are 'still supported' but have 6-month lead times?

AuroraPowell

AuroraPowell

2025-12-13

answer

That's a really smart question that hits right at the heart of the supply chain chaos we're all dealing with. I've been there myself - trying to figure out if a part is truly gone forever or just stuck in some shipping container somewhere. Here's how I approach it:

For Allen-Bradley PLC-5 specifically, you need to know that the hardware was officially discontinued in February 2022, and software support ends December 31, 2025. So when they say 'still supported,' they mean technical support exists, but manufacturing has stopped. Those 6-month lead times are likely for remaining inventory or refurbished parts.

To tell the difference between genuinely discontinued vs. temporarily unavailable parts:

1. Check for official manufacturer announcements - Rockwell Automation publishes Product Change Notifications (PCNs) and End-of-Life notices

2. Look at product lifecycle status - PLC-5 entered 'Silver Series' status back in 2008, which means active obsolescence

3. Contact authorized distributors directly - they often have more accurate availability info than general websites

4. Check multiple suppliers - if everyone has the same long lead time, it's likely discontinued

5. Monitor industry forums and communities - other maintenance folks are dealing with the same issues

The smartest inventory strategy right now? For critical PLC-5 components, consider building a small buffer stock if you can find them, but also start planning your migration path to ControlLogix. The longer you wait, the harder it gets to find those legacy parts.

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