What is a 12-Core SC/UPC to LC/UPC Fiber Optic Patch Cord?
A 12-core SC/UPC to LC/UPC fiber optic patch cord is a pre-terminated multi-fiber cable assembly that consolidates twelve individual singlemode or multimode fibers into a single round jacket. One end is terminated with twelve SC UPC connectors (2.5 mm ceramic ferrule, push-pull latching), while the opposite end carries twelve LC UPC connectors (1.25 mm small-form-factor ferrule). The hybrid SC–LC design bridges legacy ODF and patch-panel ports with high-density SFP/SFP+ transceiver interfaces in a single plug-and-play cable, eliminating the need for twelve separate duplex jumpers.
Key Specifications
| Parameter | Unit | FC, SC, LC / Armoured fiber patch cord | ST, MU | MT-RJ, MPO | E2000 | ||||||||
| SM | MM | SM | MM | SM | MM | SM | |||||||
| PC | UPC | APC | PC | UPC | PC | UPC | PC | APC | |||||
| Insertion loss(typical) | dB | ≤0.3 | ≤0.2 | ≤0.3 | ≤0.2 | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.3 |
| Return loss | dB | ≥45 | ≥50 | ≥60 | ≥30 | ≥45 | ≥50 | ≥30 | ≥45 | ≥50 | ≥35 | ≥55 | ≥75 |
| Operating wavelength | nm | 1310, 1510 | 1310, 1510 | 1310, 1510 | 1310, 1510 | ||||||||
| Exchangeability | dB | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 | ||||||||
| Vibration | dB | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 | ||||||||
| Operating temperature | °C | -40~75 | -40~75 | -40~75 | -40~75 | ||||||||
| Storage temperature | °C | -45~85 | -45~85 | -45~85 | -45~85 | ||||||||
| Cable diameter | mm | φ3.0, φ2.0, φ0.9 | φ3.0, φ2.0, φ0.9 | φ3.0, φ2.0, φ0.9 | φ3.0, φ2.0, φ0.9 | ||||||||
Connectivity Solutions
SC-to-LC Hybrid Interface - One Cable, Two Port Standards
This 12-fiber assembly is purpose-built for networks that combine SC-interface equipment (OLT line cards, PLC splitter distribution frames, CATV headend) with LC-interface gear (SFP/SFP+ transceivers, high-density patch panels, Ethernet switches). Instead of routing six separate duplex jumpers, a single 12-core patch cord delivers the same channel count with far less cable volume. Available in singlemode 9/125 µm (OS2) and multimode 50/125 µm (OM3/OM4), with PVC or LSZH jacket options, the cable adapts to riser, plenum, or general indoor environments. Custom lengths and color-coded breakout pigtails can be specified on request.
Features
≥50 dB Return Loss (UPC)
UPC flat-arc polish minimizes back reflection to ≥50 dB on every core, ensuring stable signal quality for bidirectional WDM and PON systems.
12-Fiber Consolidation
Replaces six duplex jumpers with one round cable, significantly reducing pathway congestion and simplifying moves, adds, and changes inside the fiber optic terminal box or distribution cabinet.
Wide Temperature & Aramid Yarn Reinforcement
Aramid-reinforced cable construction provides high tensile strength, while operating reliably from −40 °C to +75 °C - suitable for unheated telecom shelters and rooftop cabinets.
100 % Per-Core Tested
Every fiber is interferometer-inspected for insertion loss (≤0.2 dB typical) and return loss before shipping - no sampling, no exceptions.
Engineered for High-Density, Low-Loss Fiber Networks
The SC–LC UPC hybrid configuration pairs a 2.5 mm push-pull SC interface with a 1.25 mm latch-style LC interface, allowing direct patching between ODF frames and SFP-based switches without intermediate adapters. Its UPC flat-arc end-face suits networks where insertion loss matters more than extreme back-reflection suppression - such as Gigabit Ethernet, 10G SFP+ links, and enterprise LAN backbone runs.
Application Scenarios
FTTX Central Office - OLT to Switch Interconnect
Patches 12 fibers between OLT SC ports and Ethernet aggregation switch LC SFP+ bays in one cable run, reducing cross-connect tray clutter and speeding up subscriber provisioning.
Enterprise Data Center - ODF to Top-of-Rack Switch
Routes twelve singlemode channels from a wall-mount distribution frame to LC-dense ToR switches in a single 3.0 mm round cable - ideal for structured cabling builds that follow TIA-568 standards.
CATV Headend - Optical Receiver to Distribution Hub
Connects SC-terminated optical receivers to LC-based edge QAM or IP video platforms. The ≥50 dB return loss keeps back-reflections low enough for stable analog and digital signal transmission.
Campus LAN Backbone - Telecom Room to Floor Switch
Links SC patch panels in the main telecom room to LC SFP ports on floor-level access switches. Consolidating twelve fibers into one sheathed cable keeps riser pathways organized across multi-story buildings where fiber optic patch cords serve as the backbone.
Custom Options
| Customization Category | Options | Description / Notes |
|---|---|---|
| Fiber Type | Singlemode (SM) 9/125 OS1 / OS2 | High-speed, long-distance transmission, suitable for singlemode networks |
| Multimode (MM) 50/125 / 62.5/125 | Suitable for short-distance, LAN environments | |
| Fiber Polish / Grade | PC | Standard physical contact polish, commonly used for multimode |
| UPC | Ultra low return loss polish, commonly used for singlemode | |
| APC | 8° angled polish, ideal for long-distance singlemode transmission | |
| Fiber Core Count | 12-Core | Default, can be customized (1, 2, 4, 8, 12, 24 cores, etc.) |
| Connector Type | SC → LC | Default, can be customized to SC→SC / LC→LC / LC→SC |
| SC UPC / SC APC | SC end polish type | |
| LC UPC / LC APC | LC end polish type | |
| Cable Rating | Riser (OFNR) | For vertical floor-to-floor cabling |
| Plenum (OFNP) | For air-handling spaces, high fire safety rating | |
| Cable Diameter | φ0.9 mm | High-density cabling, space-saving |
| φ2.0 mm | Standard cabling | |
| φ3.0 mm | Durable, suitable for environments with mechanical stress | |
| Duplex / Simplex | Simplex | Single fiber |
| Duplex | Dual fiber, commonly used for SC-LC pairings | |
| Operating Environment | Operating Temp: -40~75℃ | Suitable for industrial environments |
| Storage Temp: -45~85℃ | Safe for long-term storage | |
| Optional Services | OEM / ODM customization | Labels, colors, lengths, special packaging |
| Custom Fiber Length | Standard 0.5m ~ 100m, can be customized | |
| High-Density SFP/XFP/SFP+ Compatible | Compatible with high-density transceivers |
FAQ
Q: What is the difference between UPC and APC polish on this 12-core patch cord?
A: UPC (Ultra Physical Contact) uses a flat-arc end-face that delivers ≥50 dB return loss - sufficient for Gigabit/10G Ethernet, LAN, and most CATV systems. APC (Angled Physical Contact) adds an 8° angle to achieve ≥60 dB return loss, which is required by back-reflection-sensitive protocols such as GPON and DWDM. If your network uses SC APC interfaces on the OLT side, choose the APC variant instead.
Q: Can I order this cable in multimode OM3 or OM4 for short-reach data center use?
A: Yes. The 12-core SC/UPC–LC/UPC assembly is available in singlemode OS2 (9/125 µm) and multimode OM3 or OM4 (50/125 µm, aqua jacket) grades. Specify fiber grade and desired length when placing your order.
Q: How does a 12-core assembly compare to using six individual duplex SC–LC jumpers?
A: A single 12-fiber cable significantly reduces pathway volume compared to six loose duplex cords, which lowers airflow obstruction and simplifies cable management. It also cuts installation time because you route and dress one cable instead of six. Optical performance is identical - the same precision zirconia ferrules and UPC polish are used on every connector.
Q: What jacket materials and flammability ratings are available?
A: Standard options include PVC (OFNR riser-rated) and LSZH (low-smoke zero-halogen) jackets. LSZH is recommended for enclosed plenum spaces, tunnels, or any environment where halogen-free, low-smoke performance is required by local fire codes. Both versions use aramid yarn strength members.
Q: Are custom configurations supported - such as different core counts or connector combinations?
A: Absolutely. Evolux Fiber offers OEM/ODM service for various core counts, alternative connector pairings (e.g., SC/APC to LC/UPC), custom lengths, and breakout-style fan-out sub-cables. Contact our engineering team with your specification for a tailored solution.
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