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Siemens 6ES7951-1AK00-0AA0 — PLC Accessories

Siemens 6ES7951-1AK00-0AA0 SIMATIC S7-300 RAM Memory Card, 1

MPN6ES7951-1AK00-0AA0

Siemens SIMATIC S7-300, RAM Memory Card, short design, 1 Mbyte memory size, spare part designation.

$468.63Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6ES7951-1AK00-0AA0 — Specifications
ParameterValue
Memory size1 Mbyte
Type of memoryRAM
Weight, approx.39 g
Belongs to productS7-300

Product details

The Siemens 6ES7951-1AK00-0AA0 is a RAM memory card for the S7-300 programmable logic controller family, offering 1 Mbyte of volatile storage for program blocks and data. This is the short-design variant, intended as a spare part for existing S7-300 racks where the CPU uses an external memory card slot rather than integrated memory.

What the memory type means for your application

Because this is RAM (volatile memory), the card does not retain its contents when the CPU loses power or when it is removed. Program and data must be loaded from the engineering station (STEP 7) after every power cycle or card insertion. This is standard for S7-300 RAM cards — they are used for runtime execution, not for permanent backup. If you need non-volatile storage for booting without a download, a Flash (FEPROM) memory card is the correct choice.

Frequently asked questions

What is the memory size and type?

The card provides 1 Mbyte of RAM memory for program and data storage on S7-300 CPUs.

Will this card work in a panel specified around 6ES7136-6AB00-0CA1?

No. The 6ES7136-6AB00-0CA1 is an ET 200SP analog input module, not an S7-300 CPU. This memory card only fits S7-300 CPUs with a short-design memory card slot — it has no compatibility with the ET 200SP distributed I/O system.

What compliance documentation is available?

The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC) for this order code. As a Siemens SIMATIC spare part, it typically carries CE marking and is designed for industrial environments per IEC 61131-2, but the exact documentation set should be confirmed at time of order.

MPN
6ES7951-1AK00-0AA0