The JBX43561 ST/APC to FC/UPC Simplex Fiber Patch Cable represents the gold standard in telecommunications infrastructure connectivity. Designed specifically for applications requiring precise fiber optic signal transmission, this 50-meter cable delivers the performance characteristics demanded by modern data centers, telecommunications facilities, and enterprise networks. **Superior Fiber Technology** Constructed with 9/125 singlemode fiber and G.657.A1 glass composition, this cable provides optimal light transmission with minimal signal degradation. The simplex configuration (one strand) makes it ideal for unidirectional applications or paired with complementary cables for bidirectional communication. **Exceptional Performance Specifications** With insertion loss of ≤0.35dB typical (0.15dB average) and return loss of ≥20dB, this cable exceeds industry standards for signal integrity. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm ensure reliable performance across multiple wavelength windows, supporting both standard and long-wavelength applications. **Safety and Compliance** The OFNR (Optical Fiber Non-conductive Riser) jacket rating ensures safe installation in building risers and vertical runs. Full RoHS/ELV compliance and TAA certification make this cable suitable for government and regulated installations. Manufactured globally in Taiwan, the United States, and China, each unit maintains consistent quality standards. **Practical Features** The distinctive yellow jacket simplifies cable identification and management in complex installations. The 1.8mm outside diameter provides flexibility for routing through conduit and cable trays. Standard straight-through polarity ensures straightforward connectivity without signal inversion. **Customization and Value** While this product ships as a standard 50m length, custom lengths are available to meet specific installation requirements. Free standard shipping on orders over $99 provides exceptional value, and the 90-day limited warranty protects your investment. **Applications** Perfect for data center interconnects, telecommunications networks, laboratory equipment, test and measurement systems, and any application requiring reliable singlemode fiber connectivity. The ST/APC connector provides superior return loss characteristics, making it ideal for sensitive optical applications.