How do you identify genuine discontinued Siemens S7-300 parts versus counterfeit 'new old stock' when your entire legacy production line depends on them?

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I totally get your concern - when your whole production line depends on these legacy S7-300 parts, you can't afford to gamble with counterfeits. Here's what I've found about spotting genuine parts:

First, check for the hologram seal of authenticity. Siemens puts this on the long side of S7-300 modules between the housing parts. It's a special hologram film that gets destroyed if someone tries to open the module, so if it looks tampered with or missing, that's a red flag.

Second, always verify through Siemens technical support. They recommend emailing them the serial numbers of any parts you're unsure about. Their support team can check their records and confirm if the parts are genuine.

For some modules like CP343-1 and CP443-1, you can actually check the manufacturer certificate and copyright entry through STEP 7 software or web diagnostics. There's an MD5 hash value that should match Siemens' official records.

Also, be wary of deals that seem too good to be true. Genuine discontinued parts from reputable suppliers like Critical Spare Parts or IDE Electronics might cost more, but they're worth it for reliability.

Have you come across any suspicious parts recently, or are you just being cautious before making a purchase?

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How do you identify genuine discontinued Siemens S7-300 parts versus counterfeit 'new old stock' when your entire legacy production line depends on them?

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