The JBX02404 25GBASE-BX40-D SFP28 transceiver represents cutting-edge optical networking technology, specifically engineered to meet the demands of modern data centers, service provider networks, and enterprise infrastructure. Operating at 25GB Ethernet speeds as defined by IEEE 802.3by specifications, this module delivers exceptional throughput for bandwidth-intensive applications. Key Performance Specifications: This transceiver achieves remarkable transmission distances of 40 kilometers over standard singlemode fiber (SMF) with a 9/125 micrometer core configuration. The simplex LC/UPC connector design provides single-direction, simplex communication architecture, making it ideal for bidirectional systems where separate transmit and receive channels are deployed. The module adheres to industry standards including SFF-8402 small form-factor and SFF-8472 diagnostic specifications. Design & Durability: Constructed with a protective metal case housing a precision laser transmitter, this SFP28 module maintains structural integrity in demanding environments. Compact dimensions of 5.0" × 4.0" × 2.0" enable seamless integration into existing SFP+ port configurations. The operating temperature range of -40°C to 85°C ensures reliable performance across varied climates and data center conditions. Compliance & Certification: Full RoHS and ELV directive compliance ensures environmental responsibility and regulatory adherence. Class 1 Laser certification (LN #50 7/2001), combined with TÜV, UL, and FDA 21CFR 1040.10 certifications, guarantees safety in professional deployments. These certifications validate the module's optical safety and electromagnetic compatibility. Compatibility & Integration: Direct replacement for Arista SFP-25G-ERBD-D modules ensures seamless integration with existing Arista infrastructure without firmware modifications. Custom brand programming is available for organizations requiring proprietary labeling or system integration. Value Proposition: Offered with free standard shipping on orders exceeding $99, competitive pricing, and a 90-day limited warranty, this transceiver delivers enterprise-grade reliability at accessible pricing. Ships from convenient US locations in Danville, CA and Beaufort, SC for rapid deployment. The JBX02404 represents the optimal choice for network engineers seeking proven, standards-compliant 25GB optical connectivity.