Product Overview

SIMATIC S7 Micro Memory Card – 512 kB (6ES7953-8LJ31-0AA0)
A compact, high-reliability micro memory card designed for backup and storage in SIMATIC S7-300, C7, and ET 200 automation controllers. Features 512 kB N-Flash (3 V) memory.
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Technical Specifications
Attribute Details
Memory Type Flash-EPROM (N-Flash)
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Memory Size 512 kB
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Endurance ≥ 100,000 write/erase cycles
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Data Retention ≥ 10 years after final programming
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Dimensions 24 mm (W) × 32 mm (H) × 1.4 mm (D)
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Weight ~ 2 g
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Operating Context Compatible with S7-300, C7, and ET 200 systems
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Product Lifecycle & Ordering Info

Lifecycle Status: Phase-out announced, effective since October 1, 2023
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Standard Lead Time: ~5 working days ex works
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Net Weight: 0.017 kg (17 g)
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Packaging Dimensions: 9.2 × 11.5 × 0.32 cm
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Country of Origin: Germany
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Compliance & Classification

RoHS Compliance: Since October 4, 2016
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WEEE Take-Back: Applicable (subject to waste electrical & electronic equipment regulations)
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REACH Article 33: Duty to inform; no SVHC (Substances of Very High Concern) reported as of now
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Classification Codes:

eClass 9.1 (and earlier): 27-24-22-12

ETIM 8/9: EC000192

UNSPSC 15: 43-20-14-02
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Engineering Insight

Highly Durable Storage
With at least 100,000 write/erase cycles and a minimum 10-year data retention, this MMC suits long-term program backup and field deployment in harsh industrial settings.

Compact & Lightweight
Its slim 1.4 mm profile and 2 g weight enable seamless integration—even in tightly packaged control modules.

Cross-System Compatibility
Designed for versatile use across SIMATIC S7-300, C7, and ET 200 controllers, simplifying maintenance and spare-part management.

Legacy Consideration
Given its phase-out status, engineering teams should evaluate current stock and future requirements—potential successors or alternatives may be advisable for long-term reliability.

Suggested Product Page Description

SIMATIC S7 Micro Memory Card – 512 kB (6ES7953-8LJ31-0AA0)
Ensure reliable program backup and data retention in SIMATIC S7-300, C7, and ET 200 systems with this durable micro memory card. Featuring 512 kB N-Flash memory, it supports at least 100k write/erase cycles and 10 years of data retention. At just 2 g and 1.4 mm thick, installation is effortless even in space-constrained environments.

Lifecycle Info
Phase-out initiated on October 1, 2023—secure current inventory or explore successor products now to avoid future deployment gaps.

Key Features

Flash-EPROM memory, 512 kB

Extremely durable: ≥ 100,000 cycles, ≥ 10 year retention

Ultra-compact: 24 × 32 × 1.4 mm, ~ 2 g

RoHS-compliant (since 2016), WEEE-returnable, REACH-informed

Origin: Germany; Standard lead time: ~5 days