INFRALAN optical fiber cable U-DQ(ZN)BH OS2 12E (1x12) LSZH black G657A1 7.5mm

INFRALAN optical fiber cable U-DQ(ZN)BH OS2 12E (1x12) LSZH black G657A1 7.5mm is a single-mode ribbon distribution cable designed for backbone and distribution installations where bend-insensitive OS2 fibres are required. The cable contains twelve G.657.A1 fibres in a single 12-core ribbon (1x12) within a 7.5 mm diameter sheath. Its LSZH outer jacket and Eca reaction-to-fire classification make it suitable for many indoor routes while the construction supports limited outdoor routing where low-smoke, halogen-free performance and mechanical reliability are needed.

Advantages

The cable combines bend-insensitive G.657.A1 single-mode fibres with a compact 7.5 mm diameter ribbon design, enabling high-density splicing and efficient distribution in patch panels and splice enclosures. The LSZH jacket reduces toxic gas and smoke in case of fire and the Eca classification provides compliance with common building safety requirements. A rated tensile strength of 3000 N and robust construction ensure mechanical stability during installation and in routed segments.

Suitable for

• Indoor backbone and horizontal distribution in commercial buildings
• Data centre fiber runs requiring high-density ribbon splicing
• Fiber-to-the-room or fiber-to-the-desk installations with tight bend requirements
• Short outdoor ducts or risers where LSZH and Eca classification are required

When it may not be suitable

This cable is optimized for single-mode distribution and ribbon splicing workflows; it is not intended for multi-mode applications. For long outdoor aerial spans, harsh direct burial or environments requiring higher mechanical armor or UV-resistant outer sheaths, a dedicated outdoor or armored fiber cable would be more appropriate. The Eca fire class and LSZH jacket are suitable for many indoor deployments but may not meet specific fire-code or outdoor exposure requirements in all jurisdictions.

Key specifications

• Fiber type: single-mode G.657.A1 (bend-insensitive)
• Core count and format: 12 cores in a single ribbon (1x12)
• Diameter: 7.5 mm
• Jacket material: LSZH (low smoke zero halogen)
• Reaction to fire class: Eca
• Tensile strength (installation rating): 3000 N
• Typical use: indoor backbone, distribution and short duct routing

How to use

Route the cable through planned conduits, trays or ducts and secure it following site bend-radius and tensile limits. When preparing the ribbon for splicing, strip the LSZH jacket carefully to expose the ribbon assembly, cleave individual fibres or ribbons according to the chosen fusion splicing or mechanical splice process, and terminate in compatible adapters or patch panels. Maintain manufacturer-recommended minimum bend radii during and after installation to preserve optical performance, and avoid exceeding the 3000 N tensile load during pulling operations.

What to consider before purchase

• Confirm single-mode G.657.A1 fibres meet network optical link and bend requirements
• Verify 12-core ribbon format suits your splicing and termination equipment
• Ensure LSZH and Eca classification comply with local building and fire codes
• Check required cable length, routing method and whether additional armored or outdoor-rated cable is needed

Usage recommendations

Use this cable where compact ribbon distribution, bend insensitivity and LSZH properties are required. During installation, respect minimum bend radii, use controlled pulling equipment to avoid exceeding tensile ratings, and perform optical loss testing after splicing and termination to verify link performance.