What are the types of SC-type fiber optic patch cords

SC fiber optic patch cords are available in simplex and duplex configurations, and in single-mode or multimode fibers, each suited for specific network applications.

Overview of SC Patch Cords

SC (Subscriber Connector or Square Connector) patch cords are widely used in fiber optic networks due to their low cost, ease of installation, and reliable plug-in design. They feature a 2.5mm ferrule and a rectangular snap-in connector, commonly used in FTTH, CATV, and PON networks . SC connectors do not require rotation to secure, unlike ST or FC connectors, making them user-friendly for field installations .

Types by Fiber Mode

1. Single-Mode SC Patch Cord (SM, OS1/OS2)

   • Core diameter: ~9µm
   • Supports long-distance transmission with low attenuation
   • Typically has a yellow jacket
   • Ideal for telecom, long-haul networks, and data center interconnects

2. Multimode SC Patch Cord (MM: OM1/OM2/OM3/OM4/OM5)

   • Core diameters: 50µm or 62.5µm
   • Supports short-distance, high-bandwidth applications
   • Jacket colors vary: OM1/OM2 = orange, OM3 = aqua, OM4 = violet, OM5 = lime green
   • Commonly used in LANs, data centers, and intra-building networks

Types by Cable Configuration

1. Simplex SC Patch Cord

   • Contains one fiber for one-way transmission
   • Used when only a single connection is needed between devices

2. Duplex SC Patch Cord

   • Contains two fibers for bidirectional communication (Tx/Rx)
   • Most Ethernet and PON links use duplex SC patch cords
   • Often comes in a zipcord design for easy pairing

Specialized SC Patch Cords

• Bend-Insensitive SC Patch Cord (G.657A1/A2): Designed for tight spaces and FTTH installations, reducing signal loss in sharp bends
• Armored SC Patch Cord: Provides extra protection for harsh environments
• Plenum (OFNP), Riser (OFNR), LSZH Jackets: For fire safety and low-smoke applications in buildings
• Hybrid SC Patch Cords: SC connector on one end and another type (LC, FC) on the other for mixed equipment compatibility

Summary

SC fiber optic patch cords are versatile and come in single-mode or multimode, simplex or duplex, and with specialized jackets or bend-insensitive fibers. Choosing the right type depends on distance, network environment, and device compatibility, making SC patch cords a reliable choice for both residential and enterprise optical networks .