SIEMENS 6ES7951-0KE00-0AA0 Flash Memory Card 32KB | Replacement, Equivalent & Selection Guide
The SIEMENS 6ES7951-0KE00-0AA0 is a 32KB Flash Memory Card designed for the SIMATIC S7-300 programmable logic controller series. This memory card stores user programs, data blocks, and configuration data, enabling reliable program retention even during power loss. It is a critical component for any S7-300 CPU that requires external program storage or firmware backup.
Whether you are maintaining an existing S7-300 installation, replacing a failed memory card, or sourcing a compatible equivalent for a legacy system, this guide provides the technical specifications, compatible alternatives, and selection criteria you need to make the right decision.
Technical Specifications
- Part Number: 6ES7951-0KE00-0AA0
- Manufacturer: Siemens AG
- Product Family: SIMATIC S7-300
- Memory Type: Flash EEPROM (non-volatile)
- Memory Capacity: 32 KB
- Form Factor: Plug-in memory card (MMC-compatible slot)
- Data Retention: Program and data retained without battery backup
- Operating Temperature: 0°C to +60°C (horizontal installation)
- Compatible CPUs: SIMATIC S7-300 series CPUs with memory card slot
- Write Cycles: Rated for multiple program download cycles
- Dimensions: Standard S7-300 memory card form factor
Note: All specifications are based on publicly available Siemens documentation. Konmask.com does not modify or fabricate technical parameters.
Compatible Replacement & Equivalent Models
When the 6ES7951-0KE00-0AA0 is unavailable or discontinued, the following Siemens memory cards may serve as functional replacements depending on your CPU model and program size requirements:
- 6ES7951-0KF00-0AA0 — 64KB Flash Memory Card (S7-300, upward-compatible capacity)
- 6ES7951-0KG00-0AA0 — 128KB Flash Memory Card (S7-300, larger program storage)
- 6ES7951-0KH00-0AA0 — 256KB Flash Memory Card (S7-300, extended capacity)
- 6ES7951-0KJ00-0AA0 — 512KB Flash Memory Card (S7-300, high-capacity option)
- 6ES7951-0KL00-0AA0 — 2MB Flash Memory Card (S7-300, maximum standard capacity)
Important: Always verify CPU compatibility before substituting a higher-capacity card. Larger cards are generally backward-compatible with S7-300 CPUs that accept the 32KB variant, but confirm with your CPU’s hardware manual.
Why Choose the Original Model
- Exact Fit: The 6ES7951-0KE00-0AA0 is the factory-specified card for S7-300 CPUs originally configured with 32KB storage — no reconfiguration required.
- Proven Reliability: Siemens Flash Memory Cards are manufactured to industrial-grade standards with guaranteed data retention and write endurance.
- Seamless Program Transfer: Original Siemens cards ensure full compatibility with STEP 7 and TIA Portal programming environments for direct program download.
- Warranty Compliance: Using the OEM-specified part maintains system warranty and compliance with Siemens service agreements.
- Minimal Downtime: Plug-and-play replacement with no additional configuration for systems already using this card type.
Typical Applications
- Program storage for SIMATIC S7-300 CPUs in continuous production environments
- Firmware and configuration backup for S7-300 controllers in automotive assembly lines
- Memory card replacement in food & beverage processing plants running S7-300 systems
- Spare parts inventory for water treatment and utilities automation
- Machine tool and CNC integration with S7-300 PLCs requiring compact program storage
- Building automation and HVAC control systems using legacy S7-300 hardware
System Compatibility
The 6ES7951-0KE00-0AA0 is compatible with the SIMATIC S7-300 CPU family. Typical compatible CPUs include:
- CPU 312, CPU 313, CPU 314, CPU 315, CPU 316, CPU 317, CPU 318 series
- CPU 312C, CPU 313C, CPU 314C series (compact CPUs)
- CPU 315-2 DP, CPU 317-2 DP, CPU 319-3 PN/DP (communication CPUs)
- ET 200 distributed I/O stations with integrated CPU modules
Always cross-reference your specific CPU order number against the Siemens hardware compatibility matrix before ordering.
Selection Guide
Use the following criteria to determine whether the 6ES7951-0KE00-0AA0 is the right memory card for your application:
- Program Size ≤ 32KB: The 0KE00 variant is sufficient and the most cost-effective choice.
- Program Size 32KB–64KB: Consider the 6ES7951-0KF00-0AA0 (64KB) for headroom.
- Program Size > 64KB: Select 128KB, 256KB, or 512KB variants based on actual program footprint.
- Legacy System Maintenance: If the original card was 32KB, replace like-for-like with 0KE00 to avoid any CPU compatibility edge cases.
- New System Design: Siemens recommends sizing memory cards with at least 2× the current program size to allow for future expansion.
- Battery-Free Operation: All Flash Memory Card variants (including 0KE00) retain data without a backup battery — ideal for environments where battery maintenance is impractical.
Quality Assurance & Sourcing
At Konmask.com, every SIEMENS 6ES7951-0KE00-0AA0 unit we supply undergoes the following process:
- Source Verification: Units are sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Visual Inspection: Each card is inspected for physical integrity, label authenticity, and connector condition prior to dispatch.
- Functional Testing: Where applicable, cards are tested for read/write functionality before shipment.
- Anti-Static Packaging: All memory cards are shipped in ESD-safe packaging to prevent electrostatic damage in transit.
- Documentation: Certificate of conformity and sourcing records available upon request for regulated industries.
How to Order
- Step 1: Confirm your S7-300 CPU model number and verify memory card slot compatibility.
- Step 2: Submit an inquiry via the form on this page or email support@konmask.com with your part number and required quantity.
- Step 3: Receive a formal quotation with lead time, unit price, and shipping options within 24 business hours.
- Step 4: Confirm the order and receive tracking information upon dispatch.
- Step 5: Technical support available post-delivery for installation guidance.
📞 Phone/WhatsApp: +0086 19859288691 | ✉️ Email: support@konmask.com
Replacement & Compatibility FAQ
- Q: Can I replace the 6ES7951-0KE00-0AA0 with a higher-capacity card?
- A: In most cases, yes. Higher-capacity S7-300 Flash Memory Cards (64KB, 128KB, etc.) are physically and electrically compatible with CPUs that accept the 32KB card. However, always verify with your CPU’s hardware manual, as some older CPU variants may have restrictions.
- Q: Is the 6ES7951-0KE00-0AA0 still in production?
- A: Siemens has progressively phased out lower-capacity S7-300 memory cards as the product line matures. Availability may be limited to surplus stock. Contact Konmask.com for current stock status.
- Q: Do I need to reformat the card before loading a new program?
- A: When using STEP 7 or TIA Portal, the programming software handles card formatting automatically during the program download process. No manual formatting is required.
- Q: Will the program be lost if power is removed?
- A: No. Flash Memory Cards retain stored programs and data blocks without power or a backup battery. This is one of the key advantages over older RAM-based memory modules.
- Q: Can Konmask.com supply multiple units for a spare parts order?
- A: Yes. We accommodate both single-unit and bulk orders. Please contact us with your quantity requirements for volume pricing.
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Contact: support@konmask.com | +0086 19859288691
