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SC-SC Duplex Flange Fiber Optic Adapter – High-Precision Zirconia Sleeve for Singlemode & Multimode Networks
Duplex SC‑female to SC‑female flange configuration for secure, high‑density panel mounting.
Precision zirconia ceramic alignment sleeve ensures low insertion loss (≤ 0.2-0.3 dB) and high return loss (≥ 50 dB).
Compatible with both singlemode (G652D, G657A) and multimode fiber systems.
Durable nickel‑plated metal or flame‑retardant plastic housing, available in full‑flange or reduced‑flange designs.
Rated for over 1,000 mating cycles with excellent mechanical durability and minimal performance drift.
Color‑coded housings (blue for SM, beige/black for MM) for quick identification.
Ideal for telecom ODFs, data center patching, FTTH access panels, and LAN/WAN networks.
What is an SC‑SC Duplex Flange Fiber Optic Adapter?
The SC‑SC duplex flange fiber optic adapter is a panel‑mount coupler that provides a precise, low‑loss optical connection between two SC duplex connectors. It integrates a zirconia ceramic alignment sleeve within a rugged flange housing, enabling secure, high‑density patching for both singlemode and multimode fiber networks in telecom central offices, data centers, and FTTx distribution points.
SC‑SC Duplex Flange Fiber Optic Adapter Specification parameters
- Specification parameters
- OPTICAL CHARACTERISTICS
| Name | Adapter / Coupler / Flange |
| Adapter Type | SC, LC, FC, ST, E2000 |
| Polishing Type | UPC, APC |
| Fiber Type | Single-mode, Multi-mode |
| Port Type | Single, Double |
| Sleeve Material | Ceramic / Bronze |
| Attenuation Value | 3 ~ 25 dB |
| Insertion Loss | ≤ 0.2 dB |
| Plug and Unplug Force | 200 - 600 g/f |
| Mating Durability | 1000 times, 0.2 dB |
| Repeatability | 0.1 dB |
| Interchangeability | 0.2 dB |
| Wavelength Range | 1260 ~ 1650 nm |
| Operating Temperature | -40℃ ~ +80℃ |
Product Structure & Composition
Duplex SC Interface: The adapter features two SC receptacles (female‑to‑female) on each side, supporting bidirectional transmission over two fibers. Both ports use a standard push‑pull latching mechanism for quick, secure connections.
Zirconia Alignment Sleeve: A precision ceramic split sleeve ensures micron‑level alignment of the SC connector ferrules, delivering low insertion loss and high return loss across all mating cycles.
Flange Housing: The integrated flange (full or reduced design) allows easy screw‑ or snap‑in mounting to patch panels, ODFs, and enclosures, with durable metal or plastic construction for long‑term reliability.
Benefits of SC‑SC Duplex Flange Fiber Optic Adapter
High‑Density Panel Integration
The duplex flange design combines two SC connections in a single compact housing, effectively doubling port density compared to simplex adapters. The reduced‑flange option further optimizes space, allowing up to 24 or more duplex ports in a 1U panel—perfect for data centers and telecom cabinets where real estate is at a premium.
Precision Low‑Loss Optical Performance
The zirconia ceramic alignment sleeve guarantees consistent ferrule alignment, achieving insertion loss as low as 0.2–0.3 dB and return loss above 50 dB. This ensures high‑signal integrity for 10G/40G/100G Ethernet and other bandwidth‑intensive applications, minimizing bit errors and power penalties.
Durable Construction and Long Mating Life
Engineered with robust materials—nickel‑plated metal or high‑grade plastic—the adapter withstands over 1,000 mating cycles with negligible performance change. Its flame‑retardant housing (UL94‑V0) enhances safety, while the secure flange mounting prevents accidental dislodgement during cable management.
Versatile Compatibility and Easy Identification
Supporting both singlemode and multimode fiber systems, the adapter is available with blue (SM) or beige/black (MM) housings for instant visual recognition. The standard SC interface ensures interoperability with all compliant SC connectors, simplifying inventory and maintenance across mixed‑fiber environments.
Engineering Applications SC‑SC Duplex Flange Fiber Optic Adapter
Telecom Optical Distribution Frames (ODFs)
In carrier central offices, the adapter is widely used in ODFs to terminate and interconnect SC‑based trunk and distribution cables. Its flange mounting provides a stable, organized patching field, facilitating rapid cross‑connections and circuit provisioning.
High‑Density Data Centers
For data center environments, the adapter's duplex, space‑efficient design supports top‑of‑rack switching and high‑density patching areas. Its low‑loss characteristics are essential for maintaining signal quality in high‑speed optical interconnects between servers and aggregation switches.
FTTH Access Panels and Distribution Boxes
In FTTH projects, this adapter is used in outdoor/indoor terminal boxes to connect drop cables to distribution fibers. The robust flange and durable housing ensure reliable service even in challenging environmental conditions, supporting high‑bandwidth services to subscribers.
LAN/WAN and CATV Networks
For enterprise LANs, campus networks, and CATV headends, the adapter provides a flexible patching solution. Its duplex capability simplifies bidirectional links, while the SC interface's push‑pull mechanism allows fast, tool‑less changes during network reconfiguration
Shipping & Packaging
Product Comparison：
| Feature / Dimension | SC-SC Duplex Flange Adapter | LC-LC Duplex Adapter | FC-FC Duplex Adapter |
|---|---|---|---|
| Connector Type | SC (Standard Connector) - standard form-factor, 2.5mm ferrule | LC (Lucent Connector) - small form-factor, 1.25mm ferrule | FC (Ferrule Connector) - standard form-factor, 2.5mm ferrule, threaded coupling |
| Port Configuration | Duplex - supports one transmit/receive pair | Duplex - supports one transmit/receive pair | Duplex - supports one transmit/receive pair |
| Typical Applications | Telecom central offices, FTTH ODF frames, enterprise LAN, CATV systems, test equipment, lower-speed (1G/10G) links | High-density data centers, enterprise LAN, SFP/SFP+ transceivers, 10G/25G/40G/100G links | Legacy telecom networks, test & measurement equipment, high-vibration industrial environments, CATV headends |
| Space / Port Density | Moderate - standard footprint | Very high - roughly twice the port density of SC in the same panel space | Low - threaded mechanism requires more clearance for finger access |
| Housing Material | Plastic or metal (nickel-plated); flange mount | Plastic or metal | Metal (nickel-plated) - corrosion-resistant |
| Sleeve Material | Ceramic (zirconia) or phosphor bronze | Ceramic or phosphor bronze | Ceramic (zirconia) - precision alignment |
| Fiber Mode Support | Singlemode (9/125μm) and multimode (50/125μm, 62.5/125μm) | Singlemode and multimode | Singlemode and multimode |
| Polish Type Support | UPC and APC versions available | UPC and APC versions available | UPC and APC versions available |
| Relative Cost | Low - mature, widely manufactured | Medium - compact but precise manufacturing | Medium - metal housing and precision machining add cost |
| Engineering Pros | ① Robust, durable construction with audible click locking ensures secure connection; ② Widely available and familiar to technicians; ③ Flange mount provides secure panel mounting; ④ Larger end face easier to clean and maintain; ⑤ Tool-less snap-in installation with stainless steel clips; ⑥ Color-coded per TIA/EIA-568-C.3 for rapid fiber management | ① Highest port density - doubles connections per rack unit vs. SC; ② Standard for modern transceivers (SFP, SFP+); ③ Push-pull latching for fast patching; ④ Available in ceramic or phosphor bronze sleeves; ⑤ Smaller size reduces cable management bulk | ① Excellent vibration resistance - threaded coupling provides the highest mechanical stability; ② Robust metal housing withstands harsh environments; ③ Corrosion-resistant body; ④ Extremely accurate key alignment; ⑤ Ideal for test equipment and industrial networks |
| Engineering Cons | ① Bulky for high-density environments; ② Lower port count per panel vs. LC; ③ Not compatible with SFP transceivers (requires adapter cable); ④ Larger ferrule more exposed to dust contamination | ① Smaller size makes cleaning more delicate; ② More expensive than SC; ③ Plastic clip can break if mishandled; ④ Less robust for high-vibration environments | ① Threaded screw mechanism is slower to connect/disconnect - not suitable for frequent patching; ② Larger footprint limits port density; ③ Declining in modern networks - being phased out in favor of smaller connectors; ④ Higher cost than SC |
SC‑SC Duplex Flange Fiber Optic Adapter Selection Guide
Choose the SC-SC Duplex Flange Adapter when:
Deploying telecom central offices, FTTH ODF frames, or enterprise LANs where SC connectors are already the installed standard.
The environment involves moderate-density patching where port density is not the primary constraint.
A robust, durable connection is needed - the larger SC housing is less prone to breakage and the audible click ensures secure mating.
Field maintenance and cleaning are priorities - the larger 2.5mm ferrule end face is easier to inspect and clean than LC.
Budget is a constraint - SC adapters are more economical per port than LC.
Flange mounting is required for secure panel installation in ODFs or optical cabinets.
Choose the LC-LC Duplex Adapter when:
Deploying high-density data centers, server rooms, or modern equipment rooms where space is at a premium. LC supports roughly twice the port density of SC in the same panel area.
The environment involves frequent patching and reconfiguration - the push-pull latching mechanism allows fast, tool-less insertion and removal.
New greenfield installations are being built - LC is the industry-accepted default for high-speed networks and modern fiber management systems.
Connecting to SFP, SFP+, or QSFP transceivers - LC is the standard interface for these form factors.
Choose the FC-FC Duplex Adapter when:
Deploying in high-vibration or industrial environments (factory floors, mobile networks, outdoor cabinets) - the threaded coupling provides the highest mechanical stability among common fiber connectors.
Connecting test and measurement equipment where FC connectors remain common on instruments.
Operating legacy telecom networks where FC-based termination panels are already installed.
Requiring maximum corrosion resistance - FC's metal housing with nickel-plated finish withstands harsh conditions.
Critical Note on Polish Matching: All three adapter types are available in both UPC (Ultra Physical Contact, flat polish) and APC (Angled Physical Contact, 8° angled polish) versions. Never mix UPC and APC connectors through the same adapter - the angled ferrule of APC will not align properly with the flat ferrule of UPC, causing high insertion loss and permanent damage to the ceramic ferrule end-faces. Always verify the polish type on both connectors before selecting the adapter. Color coding helps: Blue/UPC, Green/APC.
Engineering Best Practices:
| Factor | SC-SC Duplex Flange | LC-LC Duplex | FC-FC Duplex |
|---|---|---|---|
| Best for | Telecom ODF, enterprise LAN, FTTH | Data centers, high-density patching | Industrial, test equipment, legacy |
| Port Density | Moderate | Highest | Low |
| Vibration Resistance | Good (snap-in) | Moderate (latch) | Excellent (threaded) |
| Connection Speed | Fast (push-pull) | Fastest (push-pull) | Slow (threaded) |
| Ease of Cleaning | Easy (larger ferrule) | Moderate (smaller ferrule) | Moderate |
| Cost per port | Lowest | Medium | Medium-High |
| Flange Mount | Yes (standard) | Optional | Optional |
Mixed deployment strategy (recommended for large-scale networks):
Use SC-SC duplex flange adapters in telecom ODF frames and FTTH distribution panels where SC is the installed standard.
Use LC-LC duplex adapters for all new server-to-switch and switch-to-switch connections in data center environments.
Use FC-FC duplex adapters only where legacy equipment or high-vibration requirements demand them - for new installations, standardize on a single connector type (LC for data centers, SC for telecom) to avoid hybrid adapters entirely.
Installation Instructions SC‑SC Duplex Fiber Adapter
Panel Mounting
Choose the appropriate cutout in your patch panel based on the flange type (full or reduced). Insert the adapter from the front until the flange is flush, then secure with screws or snap‑clips as provided. Ensure the orientation aligns with the panel's keying to maintain consistent port labeling.
Connecting Cables
Inspect SC connector end‑faces and clean if necessary. Insert the SC connector into each port with a firm push until you hear a "click," confirming latch engagement. For duplex cables, align the polarity (A‑B) according to your system's transmit/receive mapping.
Cable Management and Labeling
Route cables with gentle bends (>30 mm radius) and secure with management bars. Apply clear labels on the panel indicating port numbers and fiber pairs for future maintenance. The color‑coded housing (blue/beige) provides an immediate visual check of fiber type.
Download YRTFIBER Product Catalog
Factory Real Shot
Frequently Asked Questions & Quick Inquiry
SC‑SC Duplex Flange Fiber Optic Adapter FAQ
Q1: Is this adapter compatible with both singlemode and multimode fiber?
A1: Yes-it supports both singlemode (G652D/G657A) and multimode fiber types.
Q2: What is the insertion loss performance of this SC‑SC adapter?
A2: Typical insertion loss is ≤ 0.2–0.3 dB, and return loss is ≥ 45–50 dB, depending on polishing.
Q3: What mounting options are available?
A3: Available in full-flange (screw mount) or reduced-flange (snap-in), suitable for patch panels or adapter plates
Q4: How durable is the connector alignment sleeve?
A4: The zirconia ceramic sleeve delivers consistent alignment for over 1.000 mating cycles with minimal degradation
Q5: Can OEM customization be requested?
A5: Yes-we support OEM/ODM, including custom flange types, connector modes, and fiber compatibility.
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