The Siemens 6ES7951-1KK00-0AA0 is a SIMATIC S7 memory card designed for the S7-300 series of programmable logic controllers. It uses 5V Flash EPROM technology with a capacity of 1 MB, providing non-volatile storage for user programs and configuration data in the compact "short design" form factor.
This memory card serves as external load memory for S7-300 CPUs, allowing the user program to be stored independently of the CPU's internal RAM. The Flash EPROM technology retains data without requiring a backup battery, making it suitable for applications where program integrity must be maintained through power cycles.
Item No :
6ES7951-1KK00-0AA0Order(MOQ) :
1Payment :
EXWProduct Origin :
GermanyShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.031kgOverview
6ES7951-1KK00-0AA0 SIMATIC PLC Module
New in stock
Origin from Germany
Payment Method: TT.Western Union
Shipping Method: DHL\UPS\Fedex\EMS\Others
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| Part Number | Description | Key Difference |
|---|---|---|
| 6ES7951-1KK00-0AA0 | S7-300 Memory Card, 1 MB Flash EPROM (this item) | Discontinued; no replacement |
| 6ES7953-8LF20-0AA0 | Micro Memory Card (MMC), 64 KB | Different card type for S7-300/C7/ET 200 |
| 6ES7953-8LG20-0AA0 | MMC, 128 KB | Higher capacity MMC |
| 6ES7953-8LJ20-0AA0 | MMC, 512 KB | Higher capacity MMC |
| 6ES7953-8LL20-0AA0 | MMC, 2 MB | Higher capacity MMC |
Important Compatibility Note: This card (6ES7951 series) is a Flash EPROM memory card for S7-300, distinct from the Micro Memory Card (MMC) series (6ES7953) used in later S7-300 CPUs and other SIMATIC systems. Verify your CPU's required memory card type before ordering.
1 × Siemens 6ES7951-1KK00-0AA0 SIMATIC S7-300 Memory Card (1 MB)
Note: CPU and programming software are sold separately.
In Stock – Limited remaining stock available
Tested – Each unit verified for functionality
Warranty Included – Purchase with confidence
Technical Support – S7-300 compatibility assistance available
Q1: What is the Siemens 6ES7951-1KK00-0AA0?
It is a SIMATIC S7 memory card for the S7-300 series PLCs, featuring 1 MB of 5V Flash EPROM storage in the compact "short design" form factor .
Q2: Is this product still available from Siemens?
No. It was cancelled effective October 1, 2022 (PM500 status) and deleted without a direct replacement . It is available only through remaining stock, refurbished units, or third-party suppliers.
Q3: What is the difference between this card and the 6ES7953 MMC series?
The 6ES7951 series are Flash EPROM memory cards for older S7-300 CPUs. The 6ES7953 series are Micro Memory Cards (MMC) used in later S7-300 CPUs and other SIMATIC systems. They are not interchangeable—verify your CPU's required card type before ordering.
Q4: Does this card require a backup battery to retain data?
No. The Flash EPROM technology is non-volatile and retains data without battery backup. This is a key advantage over RAM-based memory modules.
Q5: What is the storage capacity of this card?
The capacity is 1 MB .
Q6: Can I use this card in an S7-1200 or S7-1500 system?
No. This card is designed specifically for the S7-300 series. S7-1200 and S7-1500 systems use different memory card formats (SIMATIC Memory Cards) that are not compatible with this card.
Q7: What should I verify before ordering?
Always verify the exact part number (6ES7951-1KK00-0AA0), confirm your CPU model is an S7-300 series that accepts this card type (not an MMC-based CPU), check the condition and warranty terms of the specific unit offered, and consider whether a refurbished unit is acceptable for your application given the lack of new stock.
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