Siemens 6GK5991-1AF00-8AA0 Fibre Optic Transceiver
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Key Product Information
Core fields for model confirmation and RFQ routing. Detailed product narrative remains below.
- Brand
- Siemens
- Primary Part Number
- 6GK5991-1AF00-8AA0
- Product Type
- Fibre Optic Transceiver
- Series / Family
- SIMATIC
- Manufacturer
- Siemens AG
- Country of Origin
- DE
- Catalog Category
- Communication
- Operating Temp.
- −40 °C to +70 °C
Siemens 6GK5991-1AF00-8AA0 — Procurement Strategy for Industrial Network Infrastructure
When a plant engineer or procurement manager evaluates optical interface components for a SCALANCE X deployment, the decision extends well beyond unit price. The Siemens 6GK5991-1AF00-8AA0 is a multimode fibre optic transceiver engineered specifically for the SCALANCE X managed switch family — a platform that underpins PROFINET, PROFIBUS, and IEC 61850 communication backbones across automotive, energy, water treatment, and process industries worldwide. Sourcing this module through a verified third-party specialist like siemensplc.com gives procurement teams a measurable edge: faster access to stock, transparent pricing, and a supply chain that does not depend on a single OEM distribution channel.
This is a high-velocity component in active SCALANCE X installations. Plants running X-200, X-200IRT, X-300, or XR-300 series switches consume these transceivers during expansion projects, port upgrades, and emergency replacements. Demand is consistent, lead times from OEM channels can stretch to 8–14 weeks during allocation periods, and the cost of a single unplanned network outage in a continuous-process facility routinely exceeds the annual procurement budget for this component category. siemensplc.com maintains forward stock of the 6GK5991-1AF00-8AA0 to serve exactly this operational reality — in-stock units ship within 1–3 business days from Xiamen, with express DHL or FedEx options available for urgent requirements.
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Procurement Specifications
| Part Number | 6GK5991-1AF00-8AA0 |
| Manufacturer | Siemens AG |
| Product Series | SCALANCE X Accessories |
| Module Function | Plug-in Fibre Optic Transceiver (BFOC/ST-type) |
| Fibre Mode | Multimode (MM) — 62.5/125 µm or 50/125 µm |
| Optical Wavelength | 1300 nm |
| Data Rate | 100 Mbps Fast Ethernet |
| Max. Link Distance | 3000 m (multimode fibre) |
| Connector Interface | BFOC/2.5 (ST duplex) |
| Operating Temperature | −40 °C to +70 °C |
| Supply Voltage | 3.3 V DC (via host switch backplane) |
| Protection Rating | IP20 (module); host enclosure governs system rating |
| Certifications | CE, UL, cUL, ATEX Zone 2, IECEx |
| Compatible Platforms | SCALANCE X-200, X-200IRT, X-300, XR-300 series |
| Country of Origin | Germany |
| Unit Weight | Approx. 34 g |
| Standard Lead Time (In Stock) | 1–3 business days ex-Xiamen; express air freight available |
| Lead Time (Bulk / Special Order) | Contact siemensplc.com for confirmed allocation schedule |
Total Cost of Ownership (TCO) Analysis
Procurement teams that evaluate the 6GK5991-1AF00-8AA0 purely on unit cost are measuring the wrong variable. The true financial exposure lies in downtime risk, reactive sourcing premiums, and the compounding maintenance burden of a poorly managed optical infrastructure. A structured TCO framework reveals why partnering with siemensplc.com for this component delivers quantifiable savings across three cost dimensions.
Downtime Risk Reduction. A failed fibre transceiver in a SCALANCE X backbone switch can isolate an entire production cell or process segment. In automotive body-in-white lines, a 30-minute network outage can cost USD 50,000–150,000 in lost throughput and rework. Maintaining a consignment stock of 6GK5991-1AF00-8AA0 units — sourced at competitive wholesale pricing from siemensplc.com — converts a potential catastrophic event into a 15-minute swap. The capital tied up in two or three spare units is recovered within the first avoided incident.
Reactive Sourcing Premium Elimination. When procurement teams source this module under emergency conditions through spot markets or grey channels, they typically pay a 40–120% premium over catalogue price, accept unknown provenance, and waive any meaningful warranty. siemensplc.com offers pre-negotiated wholesale pricing with volume tiers, allowing maintenance and engineering teams to build a defensible spare-parts budget rather than absorbing unpredictable emergency expenditure.
12-Month Warranty and Maintenance Cost Containment. Every 6GK5991-1AF00-8AA0 supplied by siemensplc.com carries a 12-month warranty against manufacturing defects, with DOA replacement or full refund within 30 days of receipt. For OPEX-sensitive operations, this warranty structure eliminates the cost of carrying a separate insurance provision for optical component failures. It also simplifies the asset lifecycle model: procurement, deployment, and warranty coverage are consolidated under a single supplier relationship, reducing administrative overhead and audit complexity.
CAPEX Efficiency Through Verified Compatibility. Deploying a non-OEM transceiver in a SCALANCE X switch risks firmware-level port lockout — a scenario that forces an unplanned switch replacement or firmware rollback, both of which carry significant CAPEX and engineering labour costs. The 6GK5991-1AF00-8AA0 is the OEM-specified module; using it eliminates compatibility risk entirely and preserves full TIA Portal diagnostic visibility, which is itself a maintenance cost multiplier when troubleshooting optical link degradation.
Quality & Compliance Assurance
- 100% Genuine Product Commitment: All units are sourced from authorised Siemens distribution channels or verified industrial surplus with full batch traceability. Holographic Siemens labels, date codes, and CoC documentation are retained for every shipment.
- Pre-Shipment Inspection Protocol: Visual inspection, label authentication, and functional power-on verification are performed before dispatch. ESD-safe packaging — original Siemens blister or equivalent anti-static enclosure — is standard.
- Xiamen Customs Compliance: All export shipments are processed through Xiamen Customs with full commercial invoice, packing list, and HS code declaration. Documentation packages meet the import requirements of the EU, US, Southeast Asia, and Middle East markets.
- Multi-Currency Payment Support: USD, EUR, HKD, CNY, and other major currencies accepted. T/T bank transfer, PayPal, and trade finance arrangements available for qualified buyers.
- Certificate of Conformance (CoC): Available upon request for all shipments. Supports ISO 9001 procurement audit requirements.
Strategic Sourcing from Xiamen
Xiamen is one of China’s five Special Economic Zones and a designated international logistics hub with direct sea freight connections to over 60 countries and daily air cargo services through Xiamen Gaoqi International Airport. For industrial automation components, this geographic position translates into concrete procurement advantages.
Express air freight from Xiamen reaches Frankfurt, Dubai, Singapore, Los Angeles, and Sydney within 3–5 business days under normal conditions. DHL Express and FedEx International Priority services operate daily from Xiamen, with real-time tracking integrated into siemensplc.com’s order management workflow. For buyers in Southeast Asia — a region with rapidly expanding industrial automation investment — Xiamen offers some of the shortest transit times available from any China-based supplier.
Sea freight consolidation (LCL/FCL) is available for bulk orders, with competitive rates to major ports in Europe, the Americas, and the Middle East. EXW Xiamen and CIF destination terms are both supported, giving procurement teams flexibility to align with their existing incoterms framework. All shipments include full export documentation: commercial invoice, packing list, bill of lading or airway bill, and Certificate of Origin where required for preferential duty treatment.
siemensplc.com’s Xiamen base also provides direct access to the Pearl River Delta and Yangtze River Delta manufacturing ecosystems, enabling rapid sourcing of complementary SCALANCE X accessories, SIMATIC components, and industrial networking hardware from a single regional supplier relationship.
Contact Information
Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
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Confirmation Process
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