8 Fiber MPO to 4 x LC Duplex Singlemode Breakout Cable | 40G QSFP+ PSM4 Breakout Harness (G.657.A1)

Product Overview

Engineered for 40G QSFP+ PSM4 long-range parallel optics. This high-performance 8-fiber MPO to 4 x LC Duplex breakout cable provides a low-loss, high-efficiency pathway to split a 40G signal into four discrete 10G-LR channels. It is the ideal solution for high-density interconnects between racks and devices in modern data centers.

Features

• PREMIUM SM PERFORMANCE: Built with G.657.A1 Bend-Insensitive Singlemode Fiber, designed for long-reach applications (up to 10km) and complex cable routing with minimal signal loss.
• ULTRA-LOW LOSS: Features elite MPO-APC (<0.35dB) and LC-UPC (<0.2dB) terminations for superior optical performance and network reliability.
• DATA CENTER GRADE: LSZH (Low Smoke Zero Halogen) jacket is RoHS and IEC compliant, ensuring fire safety in high-density cabling environments.
• PRECISE POLARITY: Factory-terminated to Polarity B (Type B), ensuring the QSFP+ (Tx) channels correctly map to the SFP+ (Rx) channels for plug-and-play deployment.
• 40G OPTIMIZED: Perfectly matches 40G QSFP+ PSM4 transceivers, seamlessly converting 8 parallel fibers (4x Tx, 4x Rx) into 4 x 10G LC links.

What is a 40G PSM4 Breakout?

This cable is built specifically for the PSM4 (Parallel Single Mode 4-lane) application. PSM4 uses 8 fibers within the MPO connector to create four independent, parallel singlemode links (4 for transmitting, 4 for receiving). This breakout cable "fans out" these 8 fibers into 4 industry-standard LC duplex connectors, allowing your 40G port to communicate with four separate 10G devices simultaneously, dramatically increasing port utilization and lowering total cost.

Specifications

Applications

• 40G to 10G Interconnects: Connect a 40G QSFP+ PSM4 port on a core switch to four 10G SFP+ LR/ER ports on access switches or servers.
• High-Density Backbone: Implement structured cabling between Main Distribution Areas and Equipment Distribution Areas (EDA).
• Direct Equipment-to-Equipment: High-bandwidth direct connections between routers and switches within the same or adjacent racks.
• Telecom Rooms: Suitable for carrier-grade applications requiring long reach and high reliability.

Our Commitment to Quality

Every cable is 100% factory-tested to exceed industry standards before it ships.

• 3D Interferometer Tested: Ensures perfect MPO and LC end-face geometry (radius of curvature, apex offset, etc.).
• End-Face Inspection: Guarantees all optical surfaces are free of scratches and contaminants.
• IL/RL Tested: Every fiber core is individually tested, and a full test report is available.

Need a Different Configuration? We Can Build It.

We offer complete customization services, including:

• Custom lengths
• MPO Gender (Male/Pinned or Female/Unpinned)
• Different Polarities (Type A, B, or C)
• Custom fan-out staggering or lengths
• Other connector types

Shenzhen Ruiara Co., Ltd. is a professional manufacturer dedicated to the research, development, and production of high-performance fiber optic solutions. With advanced facilities in Shenzhen and Changde, Ruiara integrates fiber coating, polishing, injection molding, assembly, and testing into a complete and efficient manufacturing system — ensuring stable quality and fast delivery.

Our main product lines include Plastic Optical Fiber (POF) cables, Quartz Fiber Cables, MPO/MTP trunk and patch cables, optical fiber audio cables, and fiber sensor solutions. These products are widely used in data centers, industrial automation, communication systems, power transmission, and sensing applications.

Committed to technological innovation and strict quality control, Ruiara provides customers worldwide with reliable, customizable, and high-performance fiber interconnection solutions.