MDC Sr.
Duplex density,
redefined.
The US Conec ELiMENT® MDC Sr. packs LC-class optical performance into half the footprint — tripling duplex port density without changing the chassis.
What is the MDC Sr. Connector?
The ELiMENT® MDC Sr. is a miniature duplex fiber connector built on the same 1.25 mm zirconia ceramic ferrule as the industry-standard LC — delivering identical optical performance in a body roughly half the size. The DirectConec™ push-pull boot makes individual port access fast even in the densest panels.
Built on a ferrule you already trust.
The same 1.25 mm ferrule that made LC the global standard — now in a form factor that triples what fits in a rack unit. The optical reliability is proven; only the footprint is new.
The DirectConec™ boot gives clean single-port access in dense panels, and reverses polarity without exposing fibers: pull the boot, rotate 180°, snap back.
What makes the MDC Sr. different.
216 duplex ports per 1RU — 3× what LC manages in the same chassis. Ideal for switches, patch panels, blade servers, and storage systems where every millimeter of panel space counts.
The integrated DirectConec™ pull tab lets you insert or remove a single connector without disturbing neighbors — a real advantage in dense panels where standard LC bodies block access to adjacent ports.
Precision 1.25 mm zirconia ceramic ferrule delivers ≤ 0.15 dB typical insertion loss and <−65 dB typical back reflection — the same optical standard as LC, ready for 400G transmission.
Pull the boot, rotate 180°, snap back — polarity is reversed without exposing any fibers. No tools, no fiber risk, no downtime.
Available in OS2 singlemode (UPC and APC) and OM3/OM4 multimode — one connector platform covering the full range of modern data center and enterprise fiber types from 10G to 400G.
Rated for ≥ 500 mating cycles per IEC 61754, −40°C to +85°C operating range. Built for environments where reliability across frequent patching and demanding conditions is non-negotiable.
Optical & mechanical specs.
US Conec ELiMENT® MDC Sr. Connector — singlemode OS2 (8.33/125 µm) configuration. All figures per IEC 61754.
| Insertion Loss (Typical) | 0.15 dB |
| Insertion Loss (Max) | 0.3 dB |
| Back Reflection (Typical) | <−65 dB |
| Back Reflection (Max) | <−55 dB |
| Operating Temp. | −40°C to +85°C |
| Ferrule Diameter | 1.25 mm Zirconia Ceramic |
| Max Cable OD | 2.0 mm |
| Mating Cycles | ≥ 500 (IEC 61754) |
| Humidity | 0%–95% non-condensing |
| Network Speeds | 10G / 25G / 40G / 100G / 400G |
Where the MDC Sr. is deployed.
Wherever ultra-high port density, push-pull accessibility, and LC-class optical performance must coexist in the same compact infrastructure.
Switch and server connections where MDC triples usable port density versus LC — supporting 400G spine-leaf architectures without expanding panel footprint.
Central office and backbone terminations requiring reliable high-density connectivity with fast, clean patching in congested distribution frames.
Dense patching fields where miniature duplex connectors increase port count per rack unit — maximizing fiber density without adding rack space.
Hyperscale environments where every connector, port, and rack unit is optimized — LC performance at half the size for maximum switching capacity.
Structured cabling across buildings and campuses where limited rack space and growing bandwidth demands make MDC the ideal upgrade from LC.
Ultra-high-density fiber infrastructure for government data centers — available through iFiber Optix's active GSA contract for direct federal procurement.
Configurable to your exact spec.
iFiber Optix builds MDC Sr. assemblies to your exact requirements — fiber type, length, jacket rating, and polarity all configurable.
Short 1m patch runs to custom-length trunk assemblies — any length to match your exact rack, room, or campus routing requirements.
OS2 singlemode for long-reach backbone links. OM3/OM4 multimode for shorter-reach data center and enterprise connections with 10G–400G transceivers.
PVC (OFNR), plenum (OFNP), or LSZH jacket options to meet fire codes, building regulations, and environmental requirements for any installation space.
Assemblies configured to match your polarity requirements — confirm transceiver type before ordering to ensure correct polarity on first installation.
Connector type, fiber mode, length, polarity, jacket rating — iFiber Optix has built custom fiber assemblies since 2000.